Crafted with expertise, Jacques Herbin Writing & Drawing Ink is a high-quality water-based ink perfect for both writing and drawing. This specially formulated ink is made with all natural dyes, ensuring it is non-toxic and pH neutral. Its smooth flow and fast drying time make it ideal for use in fountain pens, roller and glass pens, nib holders, or with a brush. Each 30 ml bottle even comes with an integrated pen rest, making it a must-have for any writer or artist. These inks are also known as "D" bottle pen inks, a nod to their origins in the old French unit of measure "la Demi Courtine".