Hair Coloring Flashcards
Local Brand Shares of Colourants: % Value 2020
- Loreal
- Kolours
- Revlon
28.4%
Loreal
17.2%
Kolours
14.5%
Revlon
add lighter or darker
color to the hair
Hair dyes
lighten the hair without adding a new color to it
hair bleaches
penetrate the cuticle and cortex, contain an oxidizing agent, and have a more alkaline pH
Demi-permanent dyes
affects outside of hair fibers by weak chemical bonds
Temporary dyes
adhere to outside
of hair fiber and partially penetrate the cuticle layer
Semi-permanent dyes
penetrate both cuticle and cortex, contain higher amount of oxidizing agent and have highly alkaline pH
Permanent dyes
remove hair color through chemical reaction
Hair bleaches
Non-Oxidizing Products
- Temporary Dyes (Color Rinses)
- Semi-Permanent Dyes
- Progressive Hair Dyes
▪ Coating on hair cuticle easily washed out after first shampooing
▪ Contain azo compounds, triphenylmethane-based dyes, indoamines, and indophenols
Temporary Dyes (Color Rinses)
- Used to add slight tone, brighten hair, refresh colored hair, or try out a hair color
▪ Liquids, shampoos, mousses, gels, and sprays
Temporary Dyes (Color Rinses)
temporary dyes: ideal for patients with _____ gray hair
15%
▪ Use dyes that penetrate the hair cuticle
▪ Used on natural, unbleached hair to cover gray, add highlights, and cover up unwanted tones
▪ Has slightly alkaline pH (7-9)
Semi-Permanent Dyes
▪ Contains dye, alkalizing agent, solvent, surfactant,
thickener, fragrance and water
▪ Applied to hair and left for 20-30 minutes
Semi-Permanent Dyes
Semi-permanent dyes: ideal for patients with ____ gray hair
30%
▪ Known as gradual hair dyes or metallic hair dyes
▪ Contain water soluble metal salts like lead acetate
Progressive Hair Dyes
Progressive hair dye: Metal interact with _____ in the cuticle to form ______ which deposit and accumulate on the cuticle
cysteine; metal sulfides
▪ Commonly used ingredient is lead acetate
▪ Change hair color from gray to yellow-brown to black
Progressive Hair Dyes
Commonly used ingredient in progressive hair dyes
lead acetate
- often permanent in effects and has a two component system
- first component in highly alkaline formulation, and developer or activator like hydrogen peroxide
Oxidizing Products
(Two-component system) First component: highly alkaline formulation
- colorless dye intermediates
- couplers
colorless dye intermediates
- p-phenylenediamine (PPD)
- p-toluene diamine (PTD)
- p-aminophenols
Couplers
- resorcinol
- m-aminophenols
Second component:
developer or activator: hydrogen peroxide
Oxidizing Products
- Demi-Permanent Dyes
- Permanent Dyes
(they differ in conc. of hydrogen peroxide and alkalizers)
▪ Washed out after 20-24 shampooing
Demi-Permanent Dyes
Demi permanent dye: Contain _______ hydrogen peroxide and lower levels
of alkalizers like __________
2%; monoethanolamine
- Used to enhance and brighten natural hair color
▪ Used to add red highlights to brown hair
▪ Can cover up gray hairs up to 50%
Demi-Permanent Dyes
▪ Used to cover entire gray hair and produce new color
Permanent Dyes
Permanent hair dye: Contain ______ hydrogen peroxide and ______
as alkalizer to attain pH of ______
6%; ammonia; 9.0-10.5
Permanent Dyes (tint)
dye intermediates, couplers, and alkalizer,
Permanent Dyes (Developer)
hydrogen peroxide
red shades fades faster than other colors (t or f) in terms of permanent colors
T
- no new color
- Chemical process that involves removal of natural hair pigment or
artificial hair color
▪ Remove color in an irreversible chemical reaction
Hair bleaches
Hair Bleaches: Removed by _______ to reset pH to normal level
acidic shampoo
Hair bleaches: Alkaline solutions containing hydrogen peroxide with boosters like
_____ or ______
ammonium persulfate or potassium sulfate
PERFORMANCE PARAMETERS
SHINE AND COLOR INTENSITY
is a fast polarimetric video camera with high polarization
contrast
SAMBA®
is used to study hair luster, and hair surface properties like cuticle height, cuticle angle, and surface roughness
Atomic force spectroscopy
