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Color additives used in cosmetics are generally inorganic pigments, which are powders that color other substances and which are insoluble in water, oil and solvents. Color precipitates are dyes or pigments that are insoluble in water and are formed mainly by precipitating water-soluble acidic dyes through metal salts or by making these metal salts adsorb to water-resistant pigments. Inorganic pigments are stronger in coloring power, covering power, solvent resistance and durability than color precipitates and are widely used in cosmetics such as lipstick, rouge and foundation. The main inorganic pigments used in cosmetics are white pigments such as titanium dioxide and zinc oxide; colored pigments such as ferric oxide (red), chromium oxide (cyan), purple ultramarine (purple), ferrous hydroxide (yellow) and chromium oxide (green); black pigments such as carbon black and ferric tetroxide; pearlescent pigments such as fish scale flakes, titanium oxide, bismuth hydroxide and mica.
Colorants are compounds added to cosmetics in order to give color to the cosmetic or its application area. Colorants are added to cosmetics mainly to make them play a beautifying and finishing role, which can give the skin a natural and healthy make-up effect; the use of colorants can adjust the impact of the unpleasant color feeling of certain ingredients in cosmetics on the overall tone of the product to better attract consumers' eyes; by adding different colors of colorants can also be used to distinguish the types of products, etc. Colorants are mainly used in beauty cosmetics, such as lipstick, lip gloss, eye shadow, eyeliner, mascara, nail polish, rouge, powder products, hair dye products, etc., to color the skin, nails and hair, and to make the contours of the form bright and the skin tone even with the help of the interplay and coordination of colors, so as to achieve the purpose of beautification and modification.