Hydrogen peroxide

what is 10 volume peroxide when measured as a percentage?

• 12%

• 6%

• 3%

• 9%

what can 20 volume/ 6% peroxide do? (tick all that apply)

• darken

• add tone

• cover white hair

• lighten 1 or more levels

10 volume/ 3% peroxide can deposit colour. True or false?

• True

• False

what can 30 volume/ 9% peroxide do?

• lift 1 or more levels

• darken and add tone

• covers white hair

• lift 2 or more levels

1.9%/ 7 volume is a useful oxidant for toners as it doesn't lift much but can help to darken and deposit tone. True or false?

• true

• false

why must you be careful when using 40 volume/ 12%?

• it's not very effective

• development can be slow when using it

• it is very strong and can damage the hair

what is the most suitable peroxide strength to use with quasi-permanent colour?

• 20 volume/ 6%

• 10 volume/ 3%

• 40 volume/ 12%

• 30 volume/ 9%