HERE SI SOME INFORMATION JOICO VERO  K- PAK PERMANENT CREME COLOR WITH INCREDIBLE SHINE AND COVERAGE THE GRAY HAIR,VERO K- PAK COLOR DOES NOT NEED TO BE SHAMPOOED OUT AFTER PROCESSING SIMPLY RINSE ,TOWEL DRY AND APPLY K-PAK PROFESSIONAL CUTICLE SEALER FOR 5 MINUTES RINSE,TOWEL DRY AGAIN FOR MORE INFORMATION CHECK DESCRIPTION INSIDE THE BOX.