Cosmetology Test Haircolor and Lightening 4

Question 1

What is the function of hydrogen peroxide in a permanent haircolor formula?

Accepted Answer

It activates the dye intermediates and lifts natural melanin

Answer

Hydrogen peroxide (developer) oxidizes dye intermediates to form color molecules and simultaneously oxidizes melanin to lighten the hair.

Question 2

A cosmetologist is performing a color correction on a client whose hair was previously colored too dark. Which product is best used first?

Accepted Answer

A color remover or soap cap

Answer

A color remover or soap cap is typically the first step in color correction to break down and remove artificial dark pigment before re-coloring.

Question 3

The term 'single-process color' refers to:

Accepted Answer

A one-step haircolor service that lightens and deposits color simultaneously

Answer

Single-process color (permanent tint) lifts and deposits color in one application using ammonia and developer, unlike double-process services.

Question 4

Which of the following is a characteristic of semi-permanent haircolor?

Accepted Answer

It coats the outside of the hair shaft and lasts 4-6 weeks

Answer

Semi-permanent color coats the cuticle and slightly penetrates the cortex without using a developer; it fades gradually over 4-6 weeks of washing.

Question 5

What is the safest maximum time recommended for leaving bleach on the scalp?

Accepted Answer

45 minutes

Answer

Most professional bleach manufacturers recommend a maximum of 45 minutes on-scalp to prevent scalp burns and excessive hair damage.

Cosmetology Test Practice Test