color and BKT
The color should always be done the same day as the Treatment, the BKT will seal the color, it keeps it sealed and wont fade as fast. When doing touch-ups as often as every 2 weeks, is possible. You are only treating the "new" growth...there is no keratin to strip, you are only treating roots.
When "changing" color Marcia recommends waiting 2-3 weeks, after shampooing at least 4 times, this will give you even coverage, the BKT seales the cuticle of the hair and coloring hair too soon will give you "patchy" results.
When you apply color you open the cuticle and you will loose most of the BKT.
It is important to repeat the BKT inmmediately after a color process. Coordinate with your stylist your color service, do it the same day you plan your BKT, retouch roots as often as necessary and every 3-4 months when you "refresh" color from roots to ends or re-do highlights it can coincide with your repeat treatments of BKT.