TIL a trick for stubborn gray coverage at a seminar in Boise.

The instructor had us mix a demi-permanent with the permanent color, adding 10 minutes to the process. Has anyone else tried this method on resistant clients?

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lucas2067mo ago

That Boise trick works on level 10 resistant grays for me.

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gibson.eva7mo ago

Are you sure that's not just luck? Level 10 grays are built to ignore those cheap tricks. You probably just got a random glitch in the system.

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