Deep repair for severely damaged hair

The client came in asking for repair. Her request sounded roughly like this: "I have burnt my hair with dye, it will not comb through at all, it breaks and comes out in handfuls when I brush it. Please do something".
With a particular combination of formulas we did a deep repair treatment. We rebuilt the structure so that the hair would break less and comb through easily. The hair became softer and more manageable.
The treatment has a cumulative effect. It needs repeating every 2 to 6 weeks.