Koh-i-noor Artist Drawing Ink are high quality, shellac based, water dispersion pigments in a solution of natural resin with high pigmentation , brilliance of shades, resistance to water and light permanency. Ideal for use in technical pens, airbrush or dip pen. Suitable for drawing, skeching and illustration. Inks are temperable and produced using first class organic and inorganic pigments. Before use, it is necessary to shake thoroughly because sediments form with standing, which is-most noticeable with white, silver and gold; creates a water-resistant film when dry.