From: Tommy (188.8.131.52)
In Reply to: Demi permanent color before BKT? suggestions pls posted by rhea on September 18, 2007 at 6:15 pm:
The BKT will actually help to lock your color in just as it locks the keratin in your hair. Your hair cuticle is most open immediately after color, so the keratin is able to penetrate better. It is not absolutely necessary but it is a good idea. Also you have to wait 2 weeks after the BKT for color, so why not have fresh color for longer.