Schwarzkopfs Igora Zero Amm is a permanent hair coloration that is ammoniafree offering naturallooking truetotone results with up to 100 white hair coverage features Amoniafree Odorfree Up to 3 levels of lift 28 shades available Improved coverage neutralization and highlight performance 100 recyclable tubes and caps how to use Mix Zero Amm shade of your choice with developer at 1 1 ratio Apply on hair Process for 3045 minutes Rinse Style as desired WARNING This product is intended for use by qualified persons only Use by nonlicensed persons may result in unsatisfactory performance will not be held responsible by anyone who buys andor use this product in breach of this warning Hair color related products such as demipermanent colors permanent colors toners peroxides and bleaches may cause allergic reactions which in rare instances can be severe Conduct hypersensitivity and allergic patch test 48 hours prior to each application Read and follow instructions carefully These products must not be used on eyelashes or eyebrows To do so may cause blindness Wear suitable gloves Keep out of reach of children