The Bigen Powder Permanent Hair Color serves two main purposes: it provides complete grey hair coverage and it deepens existing hair color. The powder formula of this product has proven itself for thirty years by delivering effective results through its water-activated deposition of natural-looking color into resistant gray hair. The deposit-only color formula of this product provides rich color and optimum shine to all hair types without requiring ammonia regardless of your natural hair color or consistency or length or style. Designed to gently deposit color that lasts! Bigen Permanent Powder functions as a deposit-only hair color which does not need lifting (lightening) action to darken hair. The Bigen coloring system avoids unnecessary hair damage by performing only coloring actions instead of both lifting and coloring. Bigen Permanent Powder Hair Color produces hair that becomes smooth while maintaining natural appearance and achieving shiny results. Features Excellent Grey Hair Coverage Enhance Natural Hair Color Just Add Water No Ammonia No Harsh Odor