Biotouch Yellow 3ml, Bottle, BioTouch pigments are formulated with Iron Oxides which are known to be safe for cosmetic use, colorants, and micropigmentation to the face and body. Because our pigments have more of these particles in every drop, they absorb into the skin much more effectively. All pigments are formulated with the premium ingredients in the industry to ensure optimum results with High Color Retention and stay true to color.