Solvent dyes are organic dyes that are soluble in organic solvents but insoluble in water. These dyes work by dissolving in the material being colored, rather than forming a bond with it. Because of this, solvent dyes are commonly used in non-polar environments where traditional water-soluble dyes fail. They are mainly used to color hydrophobic substances such as plastics, fuels, oils, waxes, and synthetic resins.
