Products Description Produced from naturally occurring zinc ore, super purity (free from other metals). Particle size 200-1000 nanometer (nm) or 0.2-1 micrometer (µm). Benefits USP grade Reflects sunlight (UVB rays) Has soothing effects and can be used for skin irritations Whitening effect on skin therefore also used as coverage for makeup products Application Sun care & after-sun products, soothing skin care products, diaper creams, mineral makeup. Formulation Guide Can be added to formulas as is, recommended concentration 5-25%. Maximum allowed: USA 25%, Japan no limit. Can be combined with other sun screens & pigments. For external use only.