Diamine Fountain Pen Ink, Umber, 30 ml Each plastic bottle contains 30 ml (approximately one fluid ounce). Diamine ink is fast drying, water based, pH neutral, and non-toxic. Diamine fountain pen inks are safe for all brands of fountain pens. These all natural dyes are light fast and have a very smooth flow. Available in a variety of vibrant colors. Diamine has been making the finest quality inks since 1864.
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