Traditional dye colorant ink delivers rich, consistent color for professional writing
50ml bottle provides approximately 62 standard converter refills for long-lasting use
Handmade in Pennsylvania using domestic and imported ingredients for quality assurance
Swatch produced with a cotton swab on Tomoe River paper for authentic swatch representation
Summarized by Shop
GET ONE FREE bottle with Firebox in the Firebox Ink Bundle.
Firebox 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. Our ink swatch is produced with a cotton swab on Tomoe River paper. We manufacture thi
Volume
50 ml
Refill Estimation
Approximately 62 standard converter refills (0.8 ml draw)
Ink Type
Traditional dye colorant
Manufacturing Location
Pennsylvania, USA
Swatch Method
Cotton swab on Tomoe River paper
Summarized by Shop
5.0
5 ratings
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I am a bit obsessed with this colour. Its such a beautifully pigmented rust orange. So smooth and beautiful to write with.
D
Danielle · August 31, 2026
Great color. Slightly red orange and writes perfectly.
eve · November 13, 2023
Like this ink! A nice ruddy tone with some great shading.
