Pigment-based aqueous inks combine a powdered substance similar to chalk dust with the water carrier. Since the pigment sits on top of the paper instead of staining it, pigment inks scatter light and slightly more muted colors than dye-based inks. However, the dot size is only minimally larger than dye inks, and the final product will be waterproof. Pigment Green 7 inks are also stable in (resistant to) UV light.