{"product_id":"ultramarine","title":"Ultramarine","description":"\u003cp\u003eUltramarine is part of the Keystone Formula fountain pen ink line, our traditional dye-colorant ink. This hue will produce a sheening effect when saturated on high-quality papers like Tomoe River and Rhodia. Our writing sample in this listing was made on 68 gsm Tomoe River paper. Color will pull toward a strong medium blue with more sorbent papers.\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe 50mL volume will provide approximately 62 standard converter refills assuming a 0.8mL draw. \u003c\/span\u003e\u003cspan\u003eEnjoy Ultramarine as a standalone fountain pen ink, or blend it with other Birmingham Pen Co. fountain pen inks to craft your personalized shade.\u003c\/span\u003e \u003c\/p\u003e","brand":"Fountain Pen Ink","offers":[{"title":"Default Title","offer_id":44524682019058,"sku":"PN100171","price":17.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1237\/1088\/files\/Ultramarine_5c02da86-543a-4ed3-8841-846f39035e92.jpg?v=1738248694","url":"https:\/\/www.birminghampens.mom\/products\/ultramarine","provider":"Birmingham Pen Company","version":"1.0","type":"link"}