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Powder colorants form a group of finely milled inorganic and mineral pigments intended for tinting soaps, decorative cosmetics and body products. They are insoluble (they work as dispersed particles), and they excel in very good covering power , color fastness and heat resistance in cold process soaping.
In the range you will find micas with a pearlescent effect, oxides with matte, full shades, ultramarines for blue/purple tones and two-tone pigments with changing sheen. In formulation, the particle size , dosage and proper pre-preparation/dispersion in oils or glycerin according to the product type are important.
For aqueous gels, glycerin soaps or products with an aqueous phase, also consider liquid colorants. The subcategories below are used for quick orientation among the powder types.
Pearlescent to metallic reflections, excellent for decorative cosmetics, glycerin soaps and balms. They do not color the aqueous phase, they create an optical shimmer . See the selection in MICA/MIKA.
Matte, highly covering pigments with thermal stability suitable for cold process soaps, powders and lipsticks. Ideal for blending basic shades. More in Oxides.
Intense blue, violet and pink tones. Suitable for powders, eye shadows and soaps; a fine pre-dispersion is recommended for uniform coloration. See Ultramarines.
Chameleon effect – they change shade depending on the angle of incidence of light. Great for accents in decorative cosmetics and glycerin soaps. An overview can be found in Two-tone pigments.
Common indicative usage levels are 0.05–1.0 % for make-up/powders and 0.1–2.0 % for soaps (depending on the desired intensity). Gradual addition and visual control are recommended, since the pigments are concentrated.
Before use, disperse it in a small portion of oil (oil systems) or glycerin/propylene glycol (gel and glycerin bases). Sieving and gradually mixing it into the base also helps.
The pigments are insoluble , so they typically do not color the lather or skin if correctly dosed and evenly dispersed. With excessive dosage, sediment or an intense colored “stain” can occur when wiping.
Yes, especially oxides and ultramarines excel in thermal and alkaline stability. Mica is suitable for pearlescent effects and swirls; with CP, choose the dosage conservatively and check the color after the soap has set.
In aqueous gel systems and glycerin soaps they allow quick and uniform coloring without dispersing powder. See liquid colorants.
