{"product_id":"ploughmans-pebble","title":"Ploughman's Pebble","description":"\u003cp\u003e\u003cspan\u003ePloughman's Pebble is one of two new inks that portray a characteristic we've never observed in our ink formulation adventures. Depending on the type of light in proximity to the ink it can change from a muddy classic brown all the way to a red shifted sepia. We're not certain what wavelength of light causes this unique phenomenon as yet. In our experience the ink shifts to the sepia tone in daylight, and back to the muddy brown tone in most (\u003cem\u003ethough not all\u003c\/em\u003e) indoor lighting.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003ePloughman's Pebble\u003c\/span\u003e 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":47365908332786,"sku":"PN100739","price":17.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1237\/1088\/files\/Ploughmans_Pebble_60d2570b-4679-48e6-b25a-d94f57ebadeb.jpg?v=1740689504","url":"https:\/\/www.birminghampens.mom\/products\/ploughmans-pebble","provider":"Birmingham Pen Company","version":"1.0","type":"link"}