Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
40 Cards in this Set
- Front
- Back
|
Oxidation is?
|
A chemical reaction that takes place when mixing a chemical with a oxidative liquid.(eg) H2O2
|
|
|
colour + colour=
|
multi tonal colours or a double process colour
|
|
|
ammonia is important in chemicals because?
|
Its most important function is to open the cuticle to allow even absorption of liquids
|
|
|
Permanent colour is?
|
a analine derivative or oxidizing colour that creates a permanent change
|
|
|
Semis and Demis are different from permanent colour because?
|
they are acid based colours that do not have or have a limited oxidation reaction
|
|
|
What is double process colour?
|
when a product is used that can both lift and deposit colour
|
|
|
What happens when oxidation occurs?
|
a oxygen molecule attatches itself to a hydrogen molecule and changes the structure of a element
|
|
|
Why is pH important to know in chemical services?
|
to understand what happens to hair when chemicals are used.
good pH means healthy hair. |
|
|
What is the pH of hair and skin?
|
4.5-5.5
|
|
|
What is emulsion?
|
a water and oil mixture that does not seperate(eg) conditioner
|
|
|
What is a virgin colour application?
|
When colour is applied at midshaft to ends first and than roots, to ensure even coverage and eliminate hot roots.
|
|
|
It is important to mix colour when ready because?
|
the oxidation process begins as soon as H2O2 and colour is mixed
|
|
|
What are the most important things to know before beginning a
chemical service? |
In consultation, elasticity, porosity, medication, prior chemical services and thorough history.
|
|
|
What is a catalyst?
|
a product or chemical that is mixed to change a reaction or add strength to a colour.(eg) 4.0% or 1.9% or H2O2
|
|
|
When can chemical services not be done?
|
When the integrity of the hair is poor or when a scalp analysis shows abrasions or open wounds.
|
|
|
What is meant by lifting?
|
When the level of colour is removing pigment.
|
|
|
How would you describe the level system?
|
A international system developed to describe lightness or darkness of hair colour.
|
|
|
Describe eumelanin and pheumelanin.
|
Eumelanin= dark browns and black
Pheumelanin=reds gingers and some blondes. |
|
|
What are the different lightening systems?
|
Powders, creams and oil based bleaches.
|
|
|
What is the difference between on the scalp and off scalp lighteners?
|
Off the scalp lighteners are stronger and do not require heat from the scalp, on the scalp lighteners are safe for on scalp.
|
|
|
In tint back applications what are the rules to remember?
|
Don't panic, take 1 step at a time, don't promise anything, never quote a exact price.
|
|
|
Why is porosity important to determine before a colour is done?
|
Porosity helps to determine the health of the hair. The more porous the more damaged the less likely a colour will look good or last.
|
|
|
What is a metallic salt?
|
A metallic salt is what is used to make store bought colour.
|
|
|
Why do metallic salts and professional colour not mix well together?
|
Metallic salts create a coating on the hair and because of the large colour molecules, they are difficult to remove.
|
|
|
Is a Henna a mettalic salt?
|
Sometimes yes sometimes no.
It depends on where they are purchased. |
|
|
Can a Henna be removed from the hair to create a change in colour?
|
No
|
|
|
What is the maximun amount of lift a bleach or high lift colour can safely remove pigment?
|
It depends on the H2O2 strength you use. In most cases 4-5 levels.
|
|
|
What is the difference between a permanent colour and a high lift colour.
|
A high lift colour requires a higher amount of ammonia in the colour in order to temove the appropriate amount of colour. Also higher H2O2 %.
|
|
|
How long does a semi and demi colour last?
|
semi= 4-6 shampoos
demi=4-6 weeks |
|
|
What is the difference between a permanent and semi/demi colour?
|
permanent=analine derivatives
semi and demi colours are acid based colour and can only be used to brighten or deepen natural colour. |
|
|
How do you know where to begin a tint retouch?
|
Most resistant part of the head.
|
|
|
List some of the ways that highlights can be put in the hair?
|
Balyage
Foils or cap |
|
|
What is required amount of time a chemical can be left on te hair?
|
Read manufacturers instructions
|
|
|
Describe underlying pigment.
|
the pigmentation that is in the cortex of the hair, remember eumelanin and peumelanin.
|
|
|
What is contributing tone?
|
The secondary or tertiary colour that is required to neutralize unwanted tone.
|
|
|
What is the importance of the colour wheel.
|
It is what determines the Law of Colour. It is used in all aspects of art.
|
|
|
How can the colour wheel help us in our career?
|
Helps us to decide on a tone to neutralize unwanted warm ore cool tones.
|
|
|
How would you describe a warm and cool colour?
|
cool colours have blue in them warm colours have reds and yellows or golds.
|
|
|
How many levels are there in the
international level system? |
10
|
|
|
How would you describe decolourization?
|
The remaining underlying pigment becomes a predominant pigment left in the hair as we strip away layers of pigmentation.
|
