{"title":"Fountain Pen Ink","description":"\u003cp style=\"text-align: center;\"\u003eFountain pen writing inks are manufactured at our Pennsylvania workshop.\u003c\/p\u003e","products":[{"product_id":"boiler-steam","title":"Boiler Steam","description":"\u003cp style=\"text-align: right;\"\u003eMove the iron horse.\u003c\/p\u003e\n\u003cp\u003eBoiler Steam is part of the Keystone Formula fountain pen ink line, our traditional dye-colorant ink. \u003cspan\u003eThe 50mL volume will provide approximately 62 standard converter refills assuming a 0.8mL draw.\u003c\/span\u003e\u003cspan\u003e Our ink swatch is produced with a cotton swab on Tomoe River paper.\u003c\/span\u003e\u003c\/p\u003e","brand":"Fountain Pen Ink","offers":[{"title":"50mL Glass Bottle","offer_id":47365916852466,"sku":"PN100533","price":17.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1237\/1088\/files\/Boiler_Steam_4eea0ace-f3f7-4e48-96b7-c7ce0af2436f.jpg?v=1750435394"},{"product_id":"tesla-coil","title":"Tesla Coil","description":"\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003eOne of our most popular inks, Tesla Coil is a rich cobalt blue color that will produce an iridescent magenta sheening effect when saturated on high-quality papers like Tomoe River and Rhodia. The pictured writing sample is made on 68 gsm Tomoe River paper with a cotton swab and medium nib. \u003cstrong\u003eThis colorant will produce a pure cobalt blue on sorbent papers.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cem\u003e*Fountain pen ink sheen properties are best expressed when the ink is saturated on slightly hydrophobic papers like Tomoe River or \u003cmeta charset=\"utf-8\"\u003eMidori MD. Get the best results with a wet line. \u003cmeta charset=\"utf-8\"\u003e \u003cstrong\u003eVisible coloring will vary drastically by paper type and saturation\u003c\/strong\u003e.\u003c\/em\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eTesla Coil is part of the Keystone Formula fountain pen ink line, our traditional dye-colorant ink. \u003cspan\u003eThe 45mL volume will provide approximately 56 standard converter refills assuming a 0.8mL draw.\u003c\/span\u003e\u003cspan\u003e \u003cmeta charset=\"utf-8\"\u003eWe manufacture this ink in Pennsylvania with domestic and imported ingredients.\u003c\/span\u003e\u003cmeta charset=\"utf-8\"\u003e\u003c\/p\u003e","brand":"Fountain Pen Ink","offers":[{"title":"45mL Glass Bottle","offer_id":49287870611698,"sku":"PN100162","price":25.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1237\/1088\/files\/Tesla_Coil_d50f27cb-75ea-457b-8e89-73c21477bb3a.jpg?v=1785418262"},{"product_id":"voltaic-arc","title":"Voltaic Arc","description":"\u003cp\u003e\u003cspan\u003eVoltaic is a vivid dark blue to blue-black that sparks with a rich merlot sheen in saturation for an alternating current of a finish.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003cem\u003e*Fountain pen ink sheen properties are best expressed when the ink is saturated on slightly hydrophobic papers like Tomoe River or \u003cspan\u003eMidori MD\u003c\/span\u003e. Get the best results with a wet line.  \u003cstrong\u003eVisible coloring will vary drastically by paper type and saturation.\u003c\/strong\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003ePart of the Keystone Formula fountain pen ink line, Voltaic Arc is built with \u003cmeta charset=\"utf-8\"\u003etraditional water-soluble dye colorants. Our ink color swatch is produced with a cotton swab on Tomoe River paper and writing sample with a German medium nib. \u003c\/span\u003e\u003cspan\u003eThe 45mL volume will provide approximately 56 standard converter refills assuming a 0.8mL draw. G\u003c\/span\u003elass bottles arrive prepared in our beautifully foiled Birmingham Pen Co. gift box.\u003c\/p\u003e","brand":"Fountain Pen Ink","offers":[{"title":"45mL Glass Bottle","offer_id":47365916721394,"sku":"PN100165","price":19.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1237\/1088\/files\/Voltaic_Arc_de0e44e9-3b0e-4fc6-b0e9-6145da25344c.jpg?v=1786110119"},{"product_id":"jade-inferno","title":"Jade Inferno","description":"\u003cp\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003cspan\u003eJade Inferno is a radiant teal that smolders with hints of merlot sheen* in saturation for a subtly molten finish.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003cem\u003e*While it's possible to find sheen in the Jade Inferno when saturated on slightly hydrophobic papers like Tomoe River or \u003cmeta charset=\"utf-8\"\u003e\n\u003cspan\u003eMidori MD\u003c\/span\u003e, this property may require a wet pen and broad nib to achieve in writing. \u003c\/em\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003ePart of the Keystone Formula fountain pen ink line, \u003cmeta charset=\"utf-8\"\u003eJade Inferno is built with traditional dye-colorants. \u003cmeta charset=\"utf-8\"\u003eOur ink color swatch is produced with a cotton swab on Tomoe River paper. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003eThe 50mL volume will provide approximately 62 standard converter refills assuming a 0.8mL draw. G\u003c\/span\u003elass bottles arrive prepared in our beautifully foiled Birmingham Pen Co. gift box.\u003c\/p\u003e","brand":"Fountain Pen Ink","offers":[{"title":"50mL Glass Bottle","offer_id":47877227544818,"sku":"PN100168","price":17.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1237\/1088\/files\/Jade_Inferno_50.jpg?v=1756229680"},{"product_id":"horseradish-mustard","title":"Horseradish Mustard","description":"\u003cp\u003eHorseradish Mustard is part of the Keystone Formula fountain pen ink line, our traditional dye-colorant writing ink. The 45mL volume will provide approximately 56 standard converter refills assuming a 0.8mL draw. \u003cmeta charset=\"utf-8\"\u003e\u003cspan\u003eWe manufacture Horseradish Mustard in Pennsylvania with domestic and imported ingredients.\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eEach glass ink bottle arrives in a beautiful copper-foiled paper gift box, individually wrapped in reusable cellulose wadding for cushioned protection.\u003c\/span\u003e\u003c\/p\u003e","brand":"Fountain Pen Ink","offers":[{"title":"45mL","offer_id":49962185490674,"sku":"PN100299","price":17.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1237\/1088\/files\/Horseradish_Mustard_a032da28-d676-4113-b0d3-8aa9f14917a6.jpg?v=1787772520"},{"product_id":"sterling-silver","title":"Sterling Silver","description":"\u003cp\u003eRed in the bottle, a medium rose-shifted grey when wet, and mildly tarnished silver when dried on (most) paper, expect the unexpected with Sterling Silver. This heirloom inspired hue may present materially different relative to paper type, saturation, and lighting. \u003cmeta charset=\"utf-8\"\u003e\u003cspan\u003ePhotographed color swatch was produced with cotton swab on Tomoe River paper. \u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cp\u003eFeatured writing ink is designed for a fountain pen paired with common quality writing papers. \u003cmeta charset=\"utf-8\"\u003e\u003cspan\u003eThe 45mL volume delivers approximately 56 standard converter refills with a 0.8mL draw.\u003c\/span\u003e\u003cspan\u003e We manufacture this product in Pennsylvania with domestic and imported ingredients.\u003c\/span\u003e\u003c\/p\u003e","brand":"Fountain Pen Ink","offers":[{"title":"45mL Glass Bottle","offer_id":47365916426482,"sku":"PN100326","price":17.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1237\/1088\/files\/Sterling_Silver_701315ed-efa5-4049-956e-854455f9e4fb.jpg?v=1785505948"},{"product_id":"heron","title":"Heron","description":"\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eGET ONE\u003cspan\u003e \u003c\/span\u003e\u003cspan style=\"color: rgb(231, 0, 0);\"\u003eFREE\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e bottle with Heron in the \u003ca title=\"Tiger's Eye Ink Bundle\" href=\"https:\/\/www.birminghampens.mom\/products\/tigers-eye-bundle\"\u003e\u003cstrong\u003e\u003cspan style=\"color: rgb(90, 49, 244);\"\u003eTiger's Eye Ink Bundle\u003c\/span\u003e\u003c\/strong\u003e\u003c\/a\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eHeron is part of the Keystone Formula fountain pen ink line, our traditional dye-colorant ink. \u003cmeta charset=\"UTF-8\"\u003e\u003cspan\u003eThe 45mL volume will provide approximately 62 standard converter refills assuming a 0.8mL draw.\u003c\/span\u003e\u003cspan\u003e Our ink swatch is produced with a cotton swab on Tomoe River paper. \u003cmeta charset=\"utf-8\"\u003eWe manufacture this ink in Pennsylvania with domestic and imported ingredients.\u003c\/span\u003e\u003c\/p\u003e","brand":"Fountain Pen Ink","offers":[{"title":"45mL Glass Bottle","offer_id":48251173175538,"sku":"PN100463","price":17.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1237\/1088\/files\/Heron_c963b507-1f5e-4bef-b71c-e18d8c0bed84.jpg?v=1785505798"},{"product_id":"neutron-star","title":"Neutron Star Twinkle","description":"\u003cp\u003e\u003cspan\u003eNeutron Star fountain pen ink bursts onto paper with a dazzling array of blues and sheening iridescent purple-pink, drenched in our striking Twinkle Formula pigment. Quality fountain pen papers will produce secondary sheening colors most prominently and lower-quality sorbent papers will produce coloring closer to the ink's rich dark blue base hues. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cmeta charset=\"utf-8\"\u003e \u003cem\u003e*Fountain pen ink sheen properties are best expressed when the ink is saturated on slightly hydrophobic papers like Tomoe River or Midori MD. Get the best results with a wet line. \u003cstrong\u003eVisible coloring will vary drastically by paper type and saturation.\u003c\/strong\u003e\u003c\/em\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eOur swatch and writing sample is produced on 68gsm Tomoe River paper, which strongly emphasizes the secondary colors specifically (making our samples look purple on camera.) It's difficult to display the color array of sheening inks on-screen.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eTwinkle inks require additional pen maintenance and cleaning compared to their traditional ink peers and perform best in a pen with a medium-sized nib or broader. Please don't use Twinkle inks in vintage pens or pens that cannot be completely disassembled for cleaning. Secure cap and gently agitate pigment to disperse prior to filling. \u003c\/span\u003e\u003c\/p\u003e","brand":"Fountain Pen Ink","offers":[{"title":"90mL Glass Bottle","offer_id":47452520186098,"sku":"PN100466","price":39.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1237\/1088\/products\/Neutron_Star_Macro_Swatch.jpg?v=1769706172"},{"product_id":"emerald-fusion","title":"Emerald Fusion","description":"\u003cp style=\"text-align: right;\"\u003e\u003cem\u003eGo nuclear. \u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003eEmerald Fusion is packed with colorant and will produce a striking green sheen on common fountain pen friendly papers. This highly saturated hue may write on the dry side in some pens - get the best performance in a well flowing writer equipped with a medium point grade nib or broader. Part of our \u003cmeta charset=\"utf-8\"\u003etraditional dye-colorant Keystone Formula ink line, t\u003cspan\u003ehe 45mL minimum volume will provide approximately 56 standard converter refills assuming a 0.8mL draw. \u003c\/span\u003e\u003cspan\u003eOur ink swatch is produced with a cotton swab on Tomoe River paper. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003ePrepare for an INTENSE green sheen on fountain-pen-friendly papers like Tomoe River and \u003cmeta charset=\"utf-8\"\u003e\u003cspan\u003eMidori MD\u003c\/span\u003e. \u003cmeta charset=\"utf-8\"\u003e\u003cspan\u003eWe manufacture this ink in Pennsylvania with domestic and imported ingredients.\u003c\/span\u003e\u003c\/p\u003e","brand":"Fountain Pen Ink","offers":[{"title":"45mL Glass Bottle","offer_id":47365915738354,"sku":"PN100639","price":25.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1237\/1088\/files\/Emerald_Fusion_01702b0c-9b2d-49c4-8f9a-f2cf10aec52a.jpg?v=1785418182"},{"product_id":"quantum-teal","title":"Quantum Teal","description":"\u003cp\u003e\u003cspan\u003eEngineered for chromatic complexity, Quantum Teal writes with an ultra saturated, rich teal base that dries with a metallic violet sheen on quality writing papers. \u003cem\u003e\u003cstrong\u003eThe color shifts dark teal with dryer strokes and on sorbent papers. \u003c\/strong\u003e\u003c\/em\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eQuantum Teal is part of the Keystone Formula fountain pen ink line, our traditional dye-colorant ink. \u003cspan\u003eThe 45mL volume will provide approximately 56 standard converter refills assuming a 0.8mL draw.\u003c\/span\u003e\u003cspan\u003e Our ink swatch is produced with a cotton swab on Tomoe River paper.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003cspan\u003eThis ink will produce a sheening effect on high-quality papers like Tomoe River and Midori MD. Our writing sample in this listing was made on 68 gsm Tomoe River paper.\u003c\/span\u003e\u003cmeta charset=\"utf-8\"\u003e\u003c\/p\u003e","brand":"Fountain Pen Ink","offers":[{"title":"45mL Glass Bottle","offer_id":47365915279602,"sku":"PN100640","price":25.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1237\/1088\/files\/Quantum_Teal_8d0aff60-1ef3-4a79-b877-93501cc18ce8.jpg?v=1785330996"},{"product_id":"burlywood","title":"Burlywood","description":"\u003cp style=\"text-align: left;\"\u003eWith knots of character, Burlywood is part of the Keystone Formula fountain pen ink line, our traditional dye-colorant ink. \u003cspan\u003eThe 45mL volume will provide approximately 56 standard converter refills assuming a 0.8mL draw.\u003c\/span\u003e\u003cspan\u003e Our ink swatch is produced with a cotton swab on Tomoe River paper. We manufacture this ink in Pennsylvania with domestic and imported ingredients.\u003c\/span\u003e\u003cmeta charset=\"utf-8\"\u003e\u003c\/p\u003e","brand":"Fountain Pen Ink","offers":[{"title":"45mL Glass Bottle","offer_id":47365915246834,"sku":"PN100641","price":17.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1237\/1088\/files\/Burlywood_8d601412-beec-4caf-9977-6bfe4d4cbcf2.jpg?v=1785330964"},{"product_id":"tiger-lily","title":"Tiger Lily","description":"\u003cp\u003eTiger Lily is part of the Keystone Formula fountain pen ink line, our traditional dye-colorant ink. The 45mL volume will provide approximately 56 standard converter refills assuming a 0.8mL draw. \u003cmeta charset=\"utf-8\"\u003e\u003cspan\u003eWe manufacture Tiger Lily in Pennsylvania with domestic and imported ingredients.\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eEach glass ink bottle arrives in a beautiful copper-foiled paper gift box, individually wrapped in reusable cellulose wadding for cushioned protection.\u003c\/span\u003e\u003c\/p\u003e","brand":"Fountain Pen Ink","offers":[{"title":"45mL Glass Bottle","offer_id":47346182193394,"sku":"PN100680","price":17.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1237\/1088\/files\/Tiger_Lily_ecc85a32-192b-41b0-9d39-709974cdcb1f.jpg?v=1788532491"},{"product_id":"abandoned-shipyard","title":"Abandoned Shipyard","description":"\u003cp\u003eAbandoned Shipyard is part of the Keystone Formula fountain pen ink line, our traditional dye-colorant ink. The 45mL volume will provide approximately 56 standard converter refills assuming a 0.8mL draw. \u003cmeta charset=\"utf-8\"\u003e\u003cspan\u003eWe manufacture Abandoned Shipyard in Pennsylvania with domestic and imported ingredients.\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eEach glass ink bottle arrives in a beautiful copper-foiled paper gift box, individually wrapped in reusable cellulose wadding for cushioned protection.\u003c\/span\u003e\u003c\/p\u003e","brand":"Fountain Pen Ink","offers":[{"title":"45mL Glass Bottle","offer_id":49987794043122,"sku":"PN100688","price":17.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1237\/1088\/files\/Abandoned_Shipyard_c2a6e297-b576-4703-9300-3ce696b9852b.jpg?v=1787929117"},{"product_id":"aqueduct","title":"Aqueduct","description":"\u003cp style=\"text-align: center;\"\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cstrong\u003eGET ONE\u003cspan\u003e \u003c\/span\u003e\u003cspan style=\"color: rgb(231, 0, 0);\"\u003eFREE\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e bottle with Aqueduct in the \u003ca href=\"https:\/\/www.birminghampens.mom\/products\/firebox-ink-bundle\" title=\"Angelfish\"\u003e\u003cstrong\u003e\u003cspan style=\"color: rgb(90, 49, 244);\"\u003eFirebox Ink Bundle\u003c\/span\u003e\u003c\/strong\u003e\u003c\/a\u003e. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eAqueduct is part of the Keystone Formula fountain pen ink line, our traditional dye-colorant ink. The 45mL volume will provide approximately 56 standard converter refills assuming a 0.8mL draw. \u003cmeta charset=\"utf-8\"\u003e\u003cspan\u003eWe manufacture this ink in Pennsylvania with domestic and imported ingredients.\u003c\/span\u003e\u003c\/p\u003e","brand":"Fountain Pen Ink","offers":[{"title":"45mL Glass Bottle","offer_id":47678538645746,"sku":"PN100690","price":17.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1237\/1088\/files\/Aqueduct_e3316d6c-f336-4b7c-926d-2b9b1c1ec1f1.jpg?v=1785851424"},{"product_id":"butchers-broom","title":"Butcher's Broom","description":"\u003cp\u003eButcher's Broom is part of the Keystone Formula fountain pen ink line, our traditional dye-colorant ink. \u003cmeta charset=\"UTF-8\"\u003e\u003cspan\u003eThe 45mL volume will provide approximately 56 standard converter refills assuming a 0.8mL draw.\u003c\/span\u003e\u003cspan\u003e Our ink swatch is produced with a cotton swab on Tomoe River paper. \u003cmeta charset=\"utf-8\"\u003eWe manufacture this ink in Pennsylvania with domestic and imported ingredients.\u003c\/span\u003e\u003c\/p\u003e","brand":"Fountain Pen Ink","offers":[{"title":"45mL Glass Bottle","offer_id":47502449246450,"sku":"PN100691","price":17.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1237\/1088\/files\/Butchers_Broom_35c11ed7-ac6d-4478-875a-ab4a3126722d.jpg?v=1763148925"},{"product_id":"iron-ore","title":"Iron Ore","description":"\u003cp style=\"text-align: center;\"\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cstrong\u003eGET ONE\u003cspan\u003e \u003c\/span\u003e\u003cspan style=\"color: rgb(231, 0, 0);\"\u003eFREE\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e bottle with Iron Ore in the \u003ca title=\"Angelfish\" href=\"https:\/\/www.birminghampens.mom\/products\/firebox-ink-bundle\"\u003e\u003cstrong\u003e\u003cspan style=\"color: rgb(90, 49, 244);\"\u003eFirebox Ink Bundle\u003c\/span\u003e\u003c\/strong\u003e\u003c\/a\u003e. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eIron Ore is part of the Keystone Formula fountain pen ink line, our traditional dye-colorant ink. \u003cspan\u003eThe 45mL volume will provide approximately 56 standard converter refills assuming a 0.8mL draw.\u003c\/span\u003e\u003cspan\u003e Our ink swatch is produced with a cotton swab on Tomoe River paper. \u003cmeta charset=\"utf-8\"\u003eWe manufacture this ink in Pennsylvania with domestic and imported ingredients.\u003c\/span\u003e\u003c\/p\u003e","brand":"Fountain Pen Ink","offers":[{"title":"45mL Glass Bottle","offer_id":47365913837810,"sku":"PN100874","price":17.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1237\/1088\/files\/Iron_ore_0968f866-41fa-4fff-bbb2-b9c723f02f47.jpg?v=1785851635"},{"product_id":"interstellar-bronze","title":"Interstellar Bronze","description":"\u003cp\u003eBending spacetime and testing the limits of rich colorant saturation, Interstellar Bronze is a mesmerizing fusion of cosmic curiosity. This ultra-saturated hue shows a rich bronze-brown base that's overwhelmed with galactic fluorescent green sheen on slightly hydrophobic fountain-pen-friendly papers. Curiously purple-hued in the bottle, \u003cmeta charset=\"utf-8\"\u003eInterstellar Bronze is part of our traditional dye-colorant Keystone Formula writing ink series.\u003c\/p\u003e\n\u003cp\u003eSince this is an extremely saturated ink, some pens may operate on the dry side. Frequent pen cleaning is suggested and could require extra effort, but the dye colorants are entirely water-soluble. \u003cmeta charset=\"utf-8\"\u003eThis supersaturated hue performs best with broad point-grade nibs or thicker. \u003cmeta charset=\"utf-8\"\u003e\u003cspan\u003ePhotographed color swatch was produced with cotton swab on Tomoe River paper. \u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cp\u003eFeatured writing ink is designed for a fountain pen paired with common quality writing papers. \u003cmeta charset=\"utf-8\"\u003e\u003cspan\u003eThe 45mL volume delivers approximately 56 standard converter refills with a 0.8mL draw.\u003c\/span\u003e\u003cspan\u003e We manufacture this product in Pennsylvania with domestic and imported ingredients.\u003c\/span\u003e\u003c\/p\u003e","brand":"Fountain Pen Ink","offers":[{"title":"45mL Glass Bottle","offer_id":47365908955378,"sku":"PN100707","price":25.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1237\/1088\/files\/Interstellar_Bronze_5f4a3b3b-1520-49e1-befc-ddeea135dc83.jpg?v=1785249651"},{"product_id":"firebox","title":"Firebox","description":"\u003cp style=\"text-align: center;\"\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cstrong\u003eGET ONE\u003cspan\u003e \u003c\/span\u003e\u003cspan style=\"color: rgb(231, 0, 0);\"\u003eFREE\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e bottle with Firebox in the \u003ca href=\"https:\/\/www.birminghampens.mom\/products\/firebox-ink-bundle\" title=\"Angelfish\"\u003e\u003cstrong\u003e\u003cspan style=\"color: rgb(90, 49, 244);\"\u003eFirebox Ink Bundle\u003c\/span\u003e\u003c\/strong\u003e\u003c\/a\u003e. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eFirebox is part of the Keystone Formula fountain pen ink line, our traditional dye-colorant ink. \u003cspan\u003eThe 45mL volume will provide approximately 56 standard converter refills assuming a 0.8mL draw.\u003c\/span\u003e\u003cspan\u003e Our ink swatch is produced with a cotton swab on Tomoe River paper. \u003cmeta charset=\"utf-8\"\u003eWe manufacture this ink in Pennsylvania with domestic and imported ingredients.\u003c\/span\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Fountain Pen Ink","offers":[{"title":"45mL Glass Bottle","offer_id":47347669205234,"sku":"PN100708","price":17.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1237\/1088\/files\/Firebox_03dfeb04-dea1-4f9b-a634-badd10f99557.jpg?v=1785851571"},{"product_id":"extradimensional-umber","title":"Extradimensional Umber","description":"\u003cp\u003eAn ultra-saturated quasi-sheening sepia, Extradimensional Umber bends the color wheel. With a robust sepia base and a hint of green sheen at the right angle, stretching to sandy caramel on a speedier stroke, this hue will surely be one of the most mind-bending in your collection. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWARNING\u003c\/strong\u003e: Photographing the character in this ink is difficult. I've done my best to capture the extradimensional nuance, but you're bound to find something new as you play with stronger and weaker saturations on different papers in various lighting atmospheres. \u003cmeta charset=\"utf-8\"\u003e\u003cspan\u003eOur ink swatch is produced with a cotton swab on Tomoe River paper. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eSince this is an extremely saturated ink, some pens may operate on the dry side and extra effort may be required in cleaning. Extradimensional Umber is part of the Keystone Formula fountain pen ink line, built with water soluble dye-colorants. \u003cspan\u003eThe 45mL volume will provide approximately 56 standard converter refills assuming a 0.8mL draw.\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003c\/p\u003e","brand":"Fountain Pen Ink","offers":[{"title":"45mL Glass Bottle","offer_id":49288092975346,"sku":"PN100718","price":25.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1237\/1088\/files\/Extradimensional_Umber_dd04398a-eb63-4f78-8194-2c285ed4d737.jpg?v=1786023372"},{"product_id":"blossomed-lotus","title":"Blossomed Lotus","description":"\u003cp\u003eBlossomed Lotus is part of the Keystone Formula fountain pen ink line, our traditional dye-colorant ink. The 45mL volume will provide approximately 56 standard converter refills assuming a 0.8mL draw. \u003cmeta charset=\"utf-8\"\u003e\u003cspan\u003eWe manufacture \u003cmeta charset=\"utf-8\"\u003eBlossomed Lotus in Pennsylvania with domestic and imported ingredients.\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eEach glass bottle of writing ink arrives in a beautiful copper-foiled paper gift box, individually wrapped in reusable cellulose wadding for cushioned protection.\u003c\/span\u003e\u003c\/p\u003e","brand":"Fountain Pen Ink","offers":[{"title":"45mL Glass Bottle","offer_id":47365908431090,"sku":"PN100725","price":17.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1237\/1088\/files\/Blossomed_Lotus_3a787dcb-44c1-43ae-9604-798c2fb744db.jpg?v=1786376182"},{"product_id":"mountain-thistle","title":"Mountain Thistle","description":"\u003cp\u003eMountain Thistle is a soft highland heather with complexity in saturation on fountain pen friendly papers. Color shifts from a soft lavender at dusk to a muted violet.\u003c\/p\u003e\n\u003cp\u003eMountain Thistle is part of the Keystone Formula fountain pen ink line, our traditional dye-colorant ink. The 50mL volume will provide approximately 60 standard converter refills assuming a 0.8mL draw. \u003cmeta charset=\"utf-8\"\u003e\u003cspan\u003eWe manufacture this ink in Pennsylvania with domestic and imported ingredients.\u003c\/span\u003e\u003c\/p\u003e","brand":"Fountain Pen Ink","offers":[{"title":"50mL Glass Bottle","offer_id":49110852894962,"sku":"PN100727","price":17.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1237\/1088\/files\/Mountain_Thistle_fbd4817b-e333-4c8a-af4c-1879662809e7.jpg?v=1774542350"},{"product_id":"saltmarsh","title":"Saltmarsh","description":"\u003cp\u003e\u003cspan data-sheets-userformat='{\"2\":33567427,\"3\":{\"1\":0},\"4\":{\"1\":2,\"2\":16777215},\"9\":1,\"10\":2,\"12\":0,\"15\":\"Roboto\",\"16\":12,\"28\":1}' data-sheets-value='{\"1\":2,\"2\":\"Saltmarsh\"}' data-sheets-root=\"1\"\u003eSaltmarsh is one unique hue! Depending on the type of light in proximity to the ink it can change from a marshy green all the way to a light coffee brown. In our experience the ink shifts to the coffee tone in daylight, and back to the green tone in most (\u003cem\u003ethough not all\u003c\/em\u003e) indoor lighting.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-sheets-userformat='{\"2\":33567427,\"3\":{\"1\":0},\"4\":{\"1\":2,\"2\":16777215},\"9\":1,\"10\":2,\"12\":0,\"15\":\"Roboto\",\"16\":12,\"28\":1}' data-sheets-value='{\"1\":2,\"2\":\"Saltmarsh\"}' data-sheets-root=\"1\"\u003eSaltmarsh\u003c\/span\u003e is part of the Keystone Formula fountain pen ink line, our traditional dye-colorant ink. \u003cmeta charset=\"UTF-8\"\u003e\u003cspan\u003eThe 50mL volume will provide approximately 62 standard converter refills assuming a 0.8mL draw.\u003c\/span\u003e\u003cspan\u003e Our ink swatch is produced with a cotton swab on Tomoe River paper. \u003cmeta charset=\"utf-8\"\u003eWe manufacture this ink in Pennsylvania with domestic and imported ingredients.\u003c\/span\u003e\u003c\/p\u003e","brand":"Fountain Pen Ink","offers":[{"title":"50mL Glass Bottle","offer_id":47483452424434,"sku":"PN100741","price":17.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1237\/1088\/files\/Saltmarsh_25dfaf3a-ee95-4de0-860f-bfb45ed4719b.jpg?v=1774542409"},{"product_id":"sugar-kelp","title":"Sugar Kelp","description":"\u003cp\u003e\u003cspan\u003eDive deep with Sugar Kelp to discover a spectrum of nuanced organic complexities.  Varying by saturation and paper type, this hue can range from a lighter citron to a shaded olive. \u003cspan\u003eThe 45mL volume will provide approximately 56 standard converter refills assuming a 0.8mL draw.\u003c\/span\u003e\u003c\/span\u003e\u003cspan\u003e Our ink swatch is produced with a cotton swab on Tomoe River paper. \u003cmeta charset=\"utf-8\"\u003eWe manufacture this ink in Pennsylvania with domestic and imported ingredients.\u003c\/span\u003e\u003c\/p\u003e","brand":"Fountain Pen Ink","offers":[{"title":"45mL Glass Bottle","offer_id":47860381581554,"sku":"PN100744","price":17.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1237\/1088\/files\/Sugar_Kelp_088ab16c-9e9b-4c76-8d7c-553131d7b01c.jpg?v=1774542434"},{"product_id":"moon-jellyfish","title":"Moon Jellyfish","description":"\u003cp\u003eMoon Jellyfish is part of the Keystone Formula fountain pen ink line, our traditional dye-colorant ink. This hue will produce a subtle sheening effect when saturated on high-quality papers like Tomoe River and \u003cmeta charset=\"utf-8\"\u003e\u003cspan\u003eMidori MD\u003c\/span\u003e. Our color swatch was made with a cotton swab on 68 gsm Tomoe River paper. Color will pull toward a rich blue with more sorbent papers.\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe 45mL volume will provide approximately 56 standard converter refills assuming a 0.8mL draw.\u003c\/span\u003e\u003c\/p\u003e","brand":"Fountain Pen Ink","offers":[{"title":"45mL Glass Bottle","offer_id":47373625950450,"sku":"PN100864","price":19.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1237\/1088\/files\/Moon_Jellyfish_d7409b0a-b748-4658-b518-677669811f4a.jpg?v=1786110055"},{"product_id":"suncatcher","title":"Suncatcher","description":"\u003cp style=\"text-align: right;\"\u003eLight’s favorite souvenir.\u003c\/p\u003e\n\u003cp\u003eSuncatcher is part of the Keystone Formula fountain pen ink line, our traditional dye-colorant ink. \u003cspan\u003eThe 45mL volume will provide approximately 56 standard converter refills assuming a 0.8mL draw.\u003c\/span\u003e\u003cspan\u003e Our ink swatch is produced with a cotton swab on Tomoe River paper.\u003c\/span\u003e\u003c\/p\u003e","brand":"Fountain Pen Ink","offers":[{"title":"45mL Glass Bottle","offer_id":47443705528562,"sku":"PN100915","price":17.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1237\/1088\/files\/Suncatcher_6116b606-e495-4e16-bb85-622f3951d303.jpg?v=1774542458"},{"product_id":"biophoton-twinkle","title":"Biophoton Twinkle","description":"\u003cp\u003e\u003cspan\u003e\u003cstrong\u003e\u003cspan style=\"color: rgb(231, 0, 0);\"\u003eSAVE\u003c\/span\u003e\u003c\/strong\u003e\u003cstrong\u003e on Biophoton Twinkle\u003c\/strong\u003e in the \u003ca title=\"Twinkle Pair\" href=\"https:\/\/www.birminghampens.mom\/products\/twinkle-pair-pn100993\/\"\u003e\u003cstrong\u003e\u003cspan style=\"color: rgb(90, 49, 244);\"\u003eTwinkle Pair\u003c\/span\u003e\u003c\/strong\u003e\u003c\/a\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eBiophoton Twinkle is a deep emerald green fountain pen ink infused with a shimmering silver pigment for a radiant, high-energy finish that captures the brilliance of bio-illumination.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eThis ink is a shimmering spectacle jam-packed with dyes and pigment. A broad nib point grade or larger is recommended to carry the thick viscosity. This supersaturated hue offers approximately 112 standard converter refills from its generous 90mL minimum volume assuming an 0.8mL draw.\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003eA small amount of headspace is intentionally left above the liquid in the jar to help with agitation and pigment dispersion.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eOur swatch was produced on 68gsm Tomoe River paper, which emphasizes the secondary colors specifically. It's challenging to display the color array of sheening inks on-screen.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e***Visible coloring will vary drastically by paper type and saturation.***\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eTwinkle inks require additional pen maintenance and cleaning compared to their traditional ink peers. Please don't use Twinkle inks in vintage pens or pens that cannot be completely disassembled for thorough cleaning. \u003c\/span\u003e\u003c\/p\u003e","brand":"Fountain Pen Ink","offers":[{"title":"90mL Glass Bottle","offer_id":47828628504818,"sku":"PN100942","price":39.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1237\/1088\/files\/Biphoton_Twinkle_Swatch_Macro.jpg?v=1769706148"},{"product_id":"toponium-twinkle","title":"Toponium Twinkle","description":"\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cstrong\u003e\u003cspan style=\"color: rgb(231, 0, 0);\"\u003eSAVE\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e\u003cstrong\u003e on Toponium Twinkle\u003c\/strong\u003e in the \u003ca href=\"https:\/\/www.birminghampens.mom\/products\/twinkle-pair\" title=\"Twinkle Pair\"\u003e\u003cstrong\u003e\u003cspan style=\"color: rgb(90, 49, 244);\"\u003eTwinkle Pair\u003c\/span\u003e\u003c\/strong\u003e\u003c\/a\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eNamed after a theoretical particle born from top quark collisions, Toponium Twinkle radiates with a complex teal base and \u003cmeta charset=\"utf-8\"\u003e\u003cspan\u003eiridescent magenta* accents when saturated on fountain-pen-friendly papers, irradiated in a coating of golden pigment sparkle. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cmeta charset=\"utf-8\"\u003e \u003cem\u003e*Find sheen in the Toponium Twinkle when saturated on common fountain-pen-friendly papers like Tomoe River or \u003cmeta charset=\"utf-8\"\u003eMidori MD. This property may require a wet pen and broad nib to achieve in writing. Our writing samples and swatch were made on Tomoe River paper with a medium point grade nib and cotton swab.\u003c\/em\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eTwinkle Formula inks require additional pen maintenance and cleaning compared to their traditional ink peers. A medium point grade nib or larger is suggested to permit the pigment to travel from reservoir to page. We do not recommend pigmented inks in vintage pens. With all pigmented inks, we suggest using a pen that fully disassembles for complete and thorough cleaning.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eEach 90mL volume will provide over 110 standard converter refills with an average 0.8mL draw. Rigid glass bottles arrive individually wrapped in cellulose wadding and prepared in a beautifully foiled gift box. \u003cmeta charset=\"utf-8\"\u003eWe manufacture this ink in Pennsylvania with domestic and imported ingredients.\u003c\/span\u003e\u003c\/p\u003e","brand":"Fountain Pen Ink","offers":[{"title":"90mL Glass Bottle","offer_id":47979998970098,"sku":"PN100970","price":39.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1237\/1088\/files\/Toponium_Swatch_Macro.jpg?v=1769018834"},{"product_id":"glasswing-butterfly-twinkle","title":"Glasswing Butterfly Twinkle","description":"\u003cp\u003e\u003cspan\u003e\u003cmeta charset=\"utf-8\"\u003e \u003cstrong\u003e\u003cspan style=\"color: rgb(231, 0, 0);\"\u003eSAVE\u003c\/span\u003e\u003c\/strong\u003e\u003cstrong\u003e on Glasswing Butterly Twinkle\u003c\/strong\u003e in the \u003ca title=\"Twinkle Pair\" href=\"https:\/\/www.birminghampens.mom\/products\/twinkle-pair\"\u003e\u003cstrong\u003e\u003cspan style=\"color: rgb(90, 49, 244);\"\u003eTwinkle Pair\u003c\/span\u003e\u003c\/strong\u003e\u003c\/a\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003cspan\u003eGlasswing Butterfly Twinkle features a vivid sapphire base accented with iridescent magenta sheen* when saturated on fountain-pen-friendly papers. This hue is finished with a pearlescent golden Twinkle pigment, offering a remarkable range of visual variation—from light and medium sapphire tones with golden twinkle at lean saturations, to deep sapphire with intermittent merlot sheen and golden sparkle at rich saturations.*\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cspan\u003e\u003cem\u003e*Find sheen in the \u003cmeta charset=\"utf-8\"\u003eGlasswing Butterfly when saturated on common fountain-pen-friendly papers like Tomoe River or \u003cmeta charset=\"utf-8\"\u003eMidori MD. This property may require a wet pen and broad nib to achieve in writing. Our writing samples and swatch were made on Tomoe River paper with a medium point grade nib and cotton swab.\u003c\/em\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eTwinkle Formula inks require additional pen maintenance and cleaning compared to their traditional ink peers. A medium point grade nib or larger is suggested to permit the pigment to travel from reservoir to page. We do not recommend pigmented inks in vintage pens. With all pigmented inks, we suggest using a pen that fully disassembles for complete and thorough cleaning.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eEach 90mL volume will provide over 110 standard converter refills with an average 0.8mL draw. Rigid glass bottles arrive individually wrapped in cellulose wadding and prepared in a beautifully foiled gift box. \u003cmeta charset=\"utf-8\"\u003eWe manufacture this ink in Pennsylvania with domestic and imported ingredients.\u003c\/span\u003e\u003c\/p\u003e","brand":"Fountain Pen Ink","offers":[{"title":"90mL Glass Bottle","offer_id":47980004606194,"sku":"PN100971","price":39.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1237\/1088\/files\/Glasswing_Butterfly_Swatch_Macro.jpg?v=1769018858"}],"url":"https:\/\/www.birminghampens.mom\/collections\/fountain-pen-ink.oembed?page=3","provider":"Birmingham Pen Company","version":"1.0","type":"link"}