Classification of Hair Color Flashcards

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Questions and Answers

What is semi-permanent hair color?

Dye molecules sit on the outside of the hair and last 2-3 weeks without penetrating the cuticle.

What is demi-permanent hair color?

Dye molecules penetrate the cuticle without lifting and last 6-8 weeks.

What is permanent hair color?

Oxidative dyes that produce lift and displace melanin.

What are the three types of dyes commonly used in hair color products?

Oxidative dyes, pre-oxidized dyes, and direct dyes. Signup and view all the answers

What is oxidative dye?

Small intermediates that are colorless until mixed with hydrogen peroxide, then develop and deposit in cortex. Signup and view all the answers

What is pre-oxidized dye?

Semi to semi-permanent oxidative dyes that are partially oxidized and mixed with low volume peroxide. Signup and view all the answers

What is direct dye?

A large pre-colored molecule that deposits into hair and leaves most pigment between the cuticle and cortex layers. Signup and view all the answers

Oxidative dyes normally have a __ base and include either _ or ___ in the formula.

alkaline, ammonia, ammonia replacement Signup and view all the answers

Why is an alkaline environment required in hair coloring?

To swell hair, open cuticle layer, and allow hydrogen peroxide to liberate oxygen. Signup and view all the answers

What are the two separate components of permanent hair colors?

<ol> <li>Dye precursors and ammonia in alkaline base. 2. Stabilized solution of hydrogen peroxide.</li> </ol> Signup and view all the answers

What is a primary color?

Colors found naturally in nature that cannot be created. Signup and view all the answers

List the primary colors.

Red, yellow, blue. Signup and view all the answers

What is a secondary color?

Two equal parts of two different primaries mixed. Signup and view all the answers

List the secondary colors.

Orange, violet, green. Signup and view all the answers

What is a tertiary color?

Created when a primary and a secondary color are combined. Signup and view all the answers

List the tertiary colors.

Yellow-green, blue-green, blue-violet, red-violet, red-orange, yellow-orange. Signup and view all the answers

What do all primary colors mixed equally create?

A neutral color. Signup and view all the answers

What does it mean to control or cancel dominant pigment?

To neutralize an unwanted color result. Signup and view all the answers

How do you control or cancel a dominant pigment?

Move directly across the PM color map. Signup and view all the answers

To cancel out yellow in hair, what are the two missing primary colors?

Red and blue. Signup and view all the answers

What are the types of lighting in hair color?

<ol> <li>Incandescent light 2. Fluorescent light 3. Pure white / natural light.</li> </ol> Signup and view all the answers

Incandescent light favors what kind of tones?

Warm. Signup and view all the answers

What provides a warm reflection against hair and skin?

Incandescent light. Signup and view all the answers

Fluorescent light has a diffusing capacity that reduces and spreads .

shadows, lights Signup and view all the answers

Fluorescent lighting highlights what tones on hair and skin?

Cool tones. Signup and view all the answers

Pure white/natural light gives what tones?

Truest. Signup and view all the answers

Without light, there is no?

Color. Signup and view all the answers

Study Notes

Types of Hair Color Dyes

Semi-permanent: Sits on the hair's surface, lasting 2-3 weeks without penetrating the cuticle.
Demi-permanent: Penetrates the cuticle without lifting, lasting 6-8 weeks.
Permanent: Involves oxidative dyes that lift and displace melanin in the hair.

Categories of Dyes

Commonly used dyes include oxidative dyes, pre-oxidized dyes, and direct dyes.

Definitions of Dyes

Oxidative Dyes: Colorless until mixed with hydrogen peroxide, they develop and deposit in the cortex, creating the final color result.
Pre-oxidized Dyes: Semi to semi-permanent, partially oxidized dyes that require low-volume peroxide to complete the oxidation.
Direct Dyes: Large pre-colored molecules that deposit between cuticle and cortex, needing no oxidation.

Chemical Composition

Oxidative dyes typically have an alkaline base containing ammonia or ammonia replacements.
An alkaline environment is necessary to swell the hair and open the cuticle layer, allowing oxygen liberation from hydrogen peroxide.

Permanent Coloring Components

Permanent hair colors consist of two parts: dye precursors with ammonia in an alkaline base, and a stabilized hydrogen peroxide solution.

Color Theory

Primary Colors: Colors that cannot be created, including red, yellow, and blue.
Secondary Colors: Result from mixing two primary colors in equal parts, yielding orange, violet, and green.
Tertiary Colors: Created from combining a primary and a secondary color, such as yellow-green and blue-violet.

Mixing Colors

Equal mixing of primary colors results in a neutral color.
To control or cancel dominant pigments, one should neutralize unwanted color results by moving across the PM color map.
To eliminate yellow tones, red and blue are needed.

Lighting Types and Their Effects

Incandescent Light: Favors warm tones and creates a warm reflection against hair and skin.
Fluorescent Light: Diffuses light, reduces shadows, and highlights cool tones on hair and skin.
Pure White/Natural Light: Provides the truest tones.

Importance of Light

Light is essential for perceiving color; without it, color does not exist.

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Description

Test your knowledge on the various classifications of hair color. This quiz includes definitions and characteristics of semi-permanent, demi-permanent, and permanent dyes, aimed at helping you understand the differences. Ideal for cosmetology students and hair stylists.