Characteristics and Structure of Hair
indication of the strength of the cortex
Elasticity
the system for understating color relationships
the laws of color
the nonoxidizing hair color that washes out with one shampoo
temporary color
tints must be mixed with what ingredient to activate the chemical reaction known as oxidation
hydrogen peroxide
chemical compounds that lighten the hair by dispersing, dissolving and decolorizing the natural hair pigment
lighteners
the diameter of the individual hair strand that can be classified as fine, medium, or coarse
texture
the strongest and the only cool primary color
blue
the non oxidizing hair color that fades within a few weeks
semipermanent hair color
Henna is this type of permanent haircoloring that is still commonly used but should be used with caution
Vegetable tints
the amount of change from a hair lightener depends on the following:
natural pigment, strength of the lightener, length of time the lightener is left on the hair
the numbers of hair per square inch on the scalp
density
how to get secondary colors
mix EQUAL amounts of two primary colors
the oxidizing hair color that is designed to deposit color without lifting color.
demipermanent colors
the metallic ingredients such as lead acetate or silver nitrate react with the ______________ in the hair turning it brown
keratin
the most popular type of on-the-scalp lightener
cream lightener
the hairs ability to absorb moisture
porosity
tertiary colors are created by mixing equal amounts of the primary color with one adjacent secondary color. Also known as ____________ colors.
quaternary
an oxidizing hair color that is mixed with developers and remain in the hair permanently. Also known as tint
permanent hair color
When metallic dyes are combined with a vegetable tint the result is a ______________
compound dye
The mildest form of lighteners and is u sed when only one or two levels of lift are desired
oil lighteners
the natural color ranges produce these two types of melanin
eumelanin and pheomelanin
these colors are positioned directly opposite each other on the color wheel
complementary colors
the haircoloring ingredient that requires a patch predisposition test
aniline
oxidation tints are also known as _____________
aniline derivative tints
what contributes to the lightening of the hair
the underlying pigment