Veinira Black/Dark Brown Color Shampoo 200 ml Application of the special formula usually only takes 5 to 15 minutes (for most colors). The best part is that it doesn’t leave any stains on your skin. The formula has been adapted to the perfect blend of the ingredients used. We have also included the coloring shampoo and developer in one bag. This ensures a perfect mix of both ingredients so you get a perfect result every time. It also works perfectly for your beard. this will work on any hair type. Hair coloring lasts up to 30 days. Made with only the finest, premium plant-based ingredients. Veinira hair colors are made without ammonia or other chemicals. The Perfect Blend uses only the finest botanical ingredients available. It repairs and rejuvenates damaged hair. It will make your hair shiny, stronger and fully covered again.