Copic Ink R37 is a high-quality, alcohol-based ink that is perfect for use with Copic markers. This ink is specially formulated to provide vibrant, long-lasting colour that is both fast-drying and blendable. The R37 shade is a dark pink colour, perfect for adding a pop of colour to your artwork or illustrations. Copic Ink is also refillable, so you can use the same marker for years to come. It is suitable for use on paper, cardstock, and other porous surfaces. This ink is non-toxic and acid-free, making it safe for use by artists of all ages.