As I was washing out a relaxer bowl, I squirted some Nu Expressions 10 in 1 into the shampoo bowl to show the hot pink color indication when relaxer residue is detected.
Please see Relaxer tips article on this blog for September 2013 to learn more about NuExpressions 10 in 1 conditioner.
Isoplus and Elasta QP, both brands have neutralizing shampoos with color alarms. I believe the Luster haircare line has a few neutralizing shampoos with color alarms as well.
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