From: Tommy Maness (VincentJ)
In Reply to: Lisa posted by Are there different 'strengths' of TR chemicals? on October 14, 2008 at 5:10 pm:
Most TR systems have different strengths of solutions because there are so many hair types and porosities. If hair is color-treated, you will most likely need a solution for color-treated hair because the hair is more porous and will process faster than virgin hair. Usually it has nothing to do with the TR solution used, it is the expertise of the stylist doing the service. Perhaps in some cases the hair was not fully processed or not pressed correctly. An experienced TR stylist will know exactly what type of solution to use on what type of hair. Hope this helps to answer your question.