Cosmetology and Beauty Cosmetology and Beauty Chemical Treatments & Formulations 2

Question 1

What is the pH range of the hair and scalp at its natural state?

Accepted Answer

4.5–5.5

Answer

The hair and scalp naturally have a slightly acidic pH of 4.5–5.5, which keeps the cuticle closed and the hair healthy.

Question 2

In a perm service, what is the role of the neutralizer?

Accepted Answer

To re-form disulfide bonds and lock in the wave pattern

Answer

The neutralizer (typically hydrogen peroxide) re-oxidizes the broken disulfide bonds, permanently setting the hair into the new wave shape.

Question 3

Which type of hair bleach provides the highest lift for lightening services?

Accepted Answer

Off-scalp powder lightener with 40-volume developer

Answer

Off-scalp powder lighteners mixed with 40-volume developer provide the maximum lift, ideal for techniques like highlights and balayage.

Question 4

What is a strand test used to determine before a chemical service?

Accepted Answer

Processing time, color results, and hair integrity

Answer

A strand test checks how the hair will respond to a chemical service by evaluating timing, color outcome, and structural integrity beforehand.

Question 5

Toners in hair coloring are typically applied after lightening to achieve which result?

Accepted Answer

Neutralize unwanted warm or brassy tones

Answer

Toners are semi- or demi-permanent colors applied to pre-lightened hair to cancel brassy, yellow, or orange undertones.

Cosmetology and Beauty Practice Test