Permanent Makeup Artists for over 25 years with beautiful outstanding results that last. We offer a complete full line of 37 colors that are the most fashionable colors requested by clients. Custom Cosmetic Colors are formulated with iron oxide. According to Dr. Zwerling; pigments, like iron oxide, rarely cause allergic reactions. "Iron oxide has been shown to be the safest pigment," he says. "Anything that is vegetable based, organic, or natural is the most risky. It's the natural products in vegetables and herbs that can cause horrible allergic reactions."