Colour type and hydrogen peroxide devoleper review Flashcards
what is a non-oxidative colour?
•Consists of temporary and semi-permanent
•A pre-coloured molecule that generally are absorbed on or near the surface of the hair
what is an oxidative colour
•formulated to deposit only
•demi-permanent (no-lift)
What are three examples of a temporary colour
-colour rinsed
-hair mascara
-spray on colour
temporary colour only makes a physical change
can semi-permanent lift the hair when colouring
no, it’s not mixed with peroxide and is deposit only
what is the pH of a demi hair colour
7.0-9.0
demi applications can also be described as _____.
no lift
demi permanent is formulated to ____ but not ______colour.
deposit
lighten
give 3 examples of why we might use a demi haircolour
-grey blending
-refreshing faded permanent colour
-great for toning
why can permanent colour lighten and deposit at the same time in a single process?
they are more alkaline than a demi-permanent colour.
what is the pH of permanent colour
9.2-10.6
what volume of peroxide should be used to achieve grey hair coverage with permanent colours?
20 vol
peroxide combined with ammonia based colour helps the molecules reach the _____ of the hair shaft
cortex
what is the pH of peroxide
2.5-4.5
how many levels can 30 volume developer used with permanent colour lift?
up to 3 levels.
what volume developers are mixed with demi colours
6-13 vol called demi lotions
What volume developer has the ability to lift up to 4 levels?
40 vol
when should you use 10 volume developer
to deposit and enhance natural colour, never on grey hair.
when should you use 20 volume developer?
20 volume with permanent hair colour must be used for complete grey coverage
when should you use 30 volume developer?
used with permanent colour on virgin hair for additional lift, up to three levels
when should you use 40 volume developer
up to four levels of lift on virgin hair when mixed with permanent colour; used with most high lift colours
when should you use 6-13 volume developer
low volume developers that are used specifically with demi-permanent hair colour, deposit colour only.