Questions and Answers
What must be done with the mixed tint immediately after combining the products?
What do metallic dyes react with when applied to hair?
What type of tint can be considered a natural haircolor?
What is one characteristic of hydrogen peroxide as a developer?
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What does the coating action of vegetable tints help to prevent?
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What is the pH range of permanent haircolor products?
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What is a line of demarcation?
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What is required before using oxidation tints?
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Which of the following describes oxidation tints?
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How do permanent haircolor products affect the hair after processing?
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What component is necessary for activating oxidation tints?
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Which of the following statements about permanent haircolor is true?
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What happens to permanent haircolor over time?
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Study Notes
Overview of Permanent Haircolor
- Permanent haircolor products have an alkaline nature, typically with a pH between 9.0 and 10.5.
- After application, hair typically returns to its normal pH as it dries, leading to the shrinkage of the cortex and closure of the cuticle, which helps trap color molecules.
- Permanent haircolor is resistant to washing out; however, it may fade over time and require reapplication.
- A line of demarcation forms between new hair growth and previously colored hair, requiring retouch applications to the new growth.
- Best product type for effectively covering gray hair, seamlessly blending gray and non-gray areas for full coverage.
Types of Permanent Haircolor
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Oxidation Tints
- Also referred to as aniline derivative tints, penetrating tints, synthetic-organic tints, and amino tints.
- Capable of both lightening and depositing color in a single step; available in a wide spectrum of shades.
- Includes toners designed for use on pre-lightened hair; these are pale, delicate shades that are also aniline derivative products.
- Most formulations contain aniline derivatives, necessitating a predisposition (patch) test before use.
- Compatible with other professional chemical services like chemical waves and relaxers, assuming hair is in good condition.
- Available in various forms, including semiliquid or cream, packed in bottles, canisters, or tubes.
- Requires mixing with hydrogen peroxide to initiate the oxidation chemical reaction, which starts immediately upon mixing.
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Description
This quiz delves into the chemistry and processes involved in permanent haircolor. It covers the pH levels, the interaction of color molecules with hair structure, and how the hair reacts post-processing. Test your knowledge on how permanent haircolor works and its effects on hair.
