The solvent dye refers to dye being insoluble in water but soluble in an organic solvent. Based on the types of the solvents, it can be divided into:
Solvent dyes are used to color organic solvents, hydrocarbon fuels, waxes, lubricants, plastics, and other hydrocarbon-based nonpolar materials. Fuel dyes are one use of solvent dyes. They are insoluble in water. They form a colloidal solution in solvents. They have poor (basic dyes) to good (metal complex based) light fastness.
Solvent dyes are used for gold imitation (and other transparent metallic effects) of metallized polyester films ; used in marking inks, inkjet inks, glass coloration, and so on.
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