incompatibility test Flashcards
(4 cards)
1
Q
why
A
to test for metalichal salts in the hair
2
Q
when
A
before chemical services
3
Q
how
A
cut off some hair, use 20parts of hydrogen peroxide and 1 part of perm solution and let sit for 30 mins
4
Q
results
A
discoloration, heat, bubbles, hair breakage
