Permanent Flashcards
1
Q
What are the 3 types of permanent hair colour
A
Natural vegetable die
Metallic die
Synthetic
2
Q
What is natural vegetable die
A
Most common
Gives added red and copper tones to the hair
3
Q
Synthetic
A
Man made dye
Permanent tints know as para dyes and oxidation dyes because they are always mixed with hydrogen peroxide
4
Q
How long do permanent colours last
A
Until they grow out
Re growth tints usually applied every 4-6 weeks
5
Q
What are all tints mixed with
A
Hydrogen peroxide
Often mixed in equal parts unless stated on manufactures instructions
6
Q
Molecules entering the cortex
A
Small molecules form together to make large molecules that cants get out of the cortex as they swell up making them permanent
