Chemistry Basics in Barbering

What happens when a reducing agent is applied to hair during a perm service?

• It increases the pH of the hair.

• It breaks disulfide bonds in the hair.

• It adds oxygen to the hair structure.

• It seals the cuticle layer of the hair.

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DOK Level 2: Skill/Concept

Why is it important to understand the pH level of hair products used in barbering?

• To ensure the products do not change the color of the hair.

• To prevent products from freezing.

• To maintain the health and structure of the hair.

• To increase the foaming action of shampoos.

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DOK Level 2: Skill/Concept

What is the effect of a high pH shampoo on the hair cuticle?

• It tightens and closes the cuticle.

• It has no effect on the cuticle.

• It causes the cuticle to lift and swell.

• It darkens the natural hair color.

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DOK Level 2: Skill/Concept

Which type of chemical reaction is primarily used to remove hair color?

• Oxidation

• Reduction

• Neutralization

• Polymerization

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DOK Level 2: Skill/Concept

What is the primary purpose of a neutralizer in the perming process?

• To restore the natural pH of the hair.

• To break down the hair's protein structure.

• To increase the hair's elasticity.

• To add moisture back into the hair.

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DOK Level 2: Skill/Concept

How does a high alkaline product affect the hair's physical properties?

• It makes the hair more brittle.

• It enhances the hair's natural shine.

• It decreases the hair's porosity.

• It strengthens the hair's protein bonds.

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DOK Level 2: Skill/Concept

What safety precaution should be taken when using chemical relaxers?

• Use high heat to speed up the process.

• Avoid contact with the scalp.

• Apply the product unevenly for best results.

• Rinse the hair with cold water only.

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DOK Level 2: Skill/Concept

Why is it necessary to perform a strand test before chemical texturizing?

• To determine the correct processing time.

• To check the compatibility of hair dyes.

• To test the strength of the hair dryer.

• To ensure the client likes the smell of the product.

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DOK Level 2: Skill/Concept

What role does the pH level play in the effectiveness of a hair product?

• Higher pH products are less effective.

• pH does not affect product effectiveness.

• Appropriate pH ensures the product interacts correctly with the hair.

• Lower pH always increases product effectiveness.

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DOK Level 2: Skill/Concept

What is the typical pH range of hair and scalp?

• 0 - 3

• 4.5 - 5.5

• 6 - 7

• 8 - 10

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DOK Level 2: Skill/Concept