Proclere Impression Perm Twin Normal 1000ml is an exceptional quality permanent wave and neutraliser set that has been developed to offer long lasting permanent wave results. Impression Perm works with whatever perm rod size you use and develops in 5-15 mins depending on hair type. For best results use Infatreat pre and post perm to equalise hair porosity and leave hair in great condition. This pack contains 1 Litre of Impression Normal Perm lotion and 1 Litre of Impression Neutraliser.