Multiple Choice Questions

REVIEW QUESTIONS FOR SECTION 4

I. Multiple Choice Questions

A. Progressive Hair Dyes

  1. Which of the following is NOT true for progressive hair dyes?

    • a) They have a temporary effect (Progressive dyes have a gradual, semi-permanent effect.)

    • b) They gradually color the hair if used continuously

    • c) They contain metal salts

    • d) They are more popular among men

B. Permanent Oxidative Hair Dyes

  1. What is the pH of permanent oxidative hair dyes?

    • a) 2-4

    • b) 5-6

    • c) 7-8

    • d) 9-10 (Alkaline pH is needed to open the cuticle.)

C. Temporary Hair Dyes

  1. Temporary hair dyes cannot penetrate into the hair cortex due to their:

    • a) Size (Temporary dyes have larger molecules that can't penetrate the cortex.)

    • b) Smell

    • c) Viscosity

    • d) Density

D. Cuticle Layers

  1. Which of the following is the main factor influencing the tightness/openness of cuticle layers?

    • a) Temperature

    • b) Viscosity

    • c) pH

    • d) Pressure

E. Chemical Reaction

  1. Permanent hair dyes work based on a chemical reaction called:

    • a) Reduction

    • b) Oxidation

    • c) Hydrolysis

    • d) Isomerization

F. Semi-Permanent Hair Dyes

  1. Which of the following washes out during 6-8 shampooings?

    • a) Temporary hair dyes

    • b) Hair bleaches

    • c) Permanent hair dyes

    • d) Semi-permanent hair dyes

G. Components of Permanent Hair Dyeing

  1. Which of the following is a necessary component of permanent hair dyeing products?

    • a) Couplers

    • b) Colorless dye intermediates

    • c) Alkalizer

    • d) All of the above

H. Label Requirements

  1. A warning statement has to be put on the label of hair coloring products if any hair dyes are used:

    • a) Approved

    • b) Not approved (This is a key regulatory point.)

    • c) Certified

    • d) All of the above

II. Fact or Fiction?

  • a) Henna is only approved to color the hair (and not the skin). Fact. While henna is often used for temporary tattoos, its approved cosmetic use is specifically for hair.

  • b) Bleaching temporarily lightens the hair color. Fiction. Bleaching permanently lightens the hair by breaking down melanin. The tone might shift slightly over time, but the lightening itself is permanent.

  • c) Red colors fade fastest. Fact. Red dye molecules are often smaller and more prone to fading.

  • d) Graying is caused by the production of a gray pigment. Fiction. Graying is caused by the loss of pigment (melanin), not the production of a gray pigment. The absence of pigment makes the hair appear gray or white.

Here are the correct answers for the Section 4 Review Questions:

Multiple Choice Questions

  1. a) They have a temporary effect (Progressive dyes have a gradual, semi-permanent effect.)

  2. d) 9-10 (Alkaline pH is needed to open the cuticle.)

  3. a) Size (Temporary dyes have larger molecules that can't penetrate the cortex.)

  4. c) pH

  5. b) Oxidation

  6. a) Temporary hair dyes

  7. d) All of the above

  8. b) Not approved (This is a key regulatory point.)

Fact or Fiction?

  • a) Henna is only approved to color the hair (and not the skin). Fact. While henna is often used for temporary tattoos, its approved cosmetic use is specifically for hair.

  • b) Bleaching temporarily lightens the hair color. Fiction. Bleaching permanently lightens the hair by breaking down melanin. The tone might shift slightly over time, but the lightening itself is permanent.

  • c) Red colors fade fastest. Fact. Red dye molecules are often smaller and more prone to fading.

  • d) Graying is caused by the production of a gray pigment. Fiction. Graying is caused by the loss of pigment (melanin), not the production of a gray pigment. The absence of pigment makes the hair appear gray or white.