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. What would you like to do?
What two things determine a final color result?
natural pigment + artifical pigment
What is a chemical compound or mixture of compounds that consist of many molecules in a long chain-like structure?
What two categories of color fall into nonoxidative color?
Temporary & Semi-Permanent
How long will a temporary color last?
shampoo to shampoo
Does temporary color create a chemical or physical change to the hair?
How does a temporary color change the color of the hair?
they contain large color molescules that coat only the surface of the cuticle.
Why do temporary colors not require a patch test?
because they do NOT contain aniline derivative substances
Can semi-permanent hair color lighten hair?
no, they do not use chemicals to alter the hair.
Why are retouches not required with semi-permanent hair color?
because the color will fade, leaving no line of demarcation.
When do semi-permanent hair colors require a patch test?
if it contains an aniline-derivative tint.
When do semi-permanent hair colors have the potential to alter the structure of the hair?
repeated application, especially on chemically treated hair.
What categories of hair color are oxidative?
demi-permanent & permanent
What is the difference between non-oxidative color and oxidative color?
- NonOxidative: no developer is needed, only a physical change to hair.
- Oxidative: developer is needed, both chemical and physical change to hair.
What type of developer does demi-permanent color use?
How long is a demi-permanent color expected to last?
Permanent hair color is different than other hair color because it is capable of doing what two things in a single process?
lifting & depositing
What is another term for the colorless molecules in hair color?
When do the colorless molecules become colored?
when mixed with hydrogen peroxide
What allows for the lift/lightening of the hair's natural pigment in permanent color?
ammonia & hydrogen peroxide
What are some products that can be used to remove unwanted permanent hair color?
- color removers
- decolorizer/color cleanser
Is permanent color capable of darkening and toning existing color?
If you are not able to achieve the desired amount of lift in one process, what may be required?
What are the three forms that hair color can come in and what are the pros of each?
- Liquid: good penetration
- Cream: conditioners & thickening agents
What is typically light pastel colors used to tone prelightened hair by depositing color and neutralizing unwanted pigment that remains after prelightening?
How should a toner be selected?
based on color theory
When will a toner require a patch test?
What are the two types of fillers and their purposes?
- Conditioning Filler: recondition damaged hair prior to a chemical service.
- Color Filler: used on damaged hair when there is a question as to whether or not the color will hold with such porous hair.
Why should hair never be lightened to white?
it would cause extreme damage to the hair
Why would applying a toner to over lightened hair cause the hair to look cool, ashy, gray or dull?
because most of the warm tones are missing
How is timing for lightening determined?
time will vary with every client due to natural pigmentation of hair and resistance
How many levels of decolorization are there?
What is the most commonly used oxidizing agent in developers?
What is the pH of hydrogen peroxide?
What does hydrogen need to be mixed with to become active?
Why shouldn't developers be mixed in a metal bowl and what type of bowls should developers be mixed in?
- metal bowl: may cause it to become weak
- Glass or plastic bowls are best.
What is the most common vegetable dye and what colors does it product?
henna: reddish highlights in the hair
WHy are metallic dyes known as progressive dyes?
because the hair turns darker with each application
What is a compound dye?
combination of metallic and vegetable dyes
Before performing a chemical service on hair dyed with vegetable, metallic, or compound dye, what is the best solution for removing the dye?
cut out dyed hair
What would you like to do?
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