Cosmetology Theory - pH

Notes on pH day of Cosmetology School

What does pH stand for?

Potential Hydrogen

What number on the scale is neutral?

7

What is the range of numbers on the scale of pH?

1-14

What is the pH of hair and skin?

4.5-5.5

With the pH of hair and skin, would you want your shampoo to be acid or alkaline?

Acid

Logarithm

Multiples of 10

The pH of lemon juice is 2.00-2.60, is it acid or alkaline?

Acid

Baking soda’s pH is 8, is it acid or alkaline?

Alkaline

The pH of hand wash is 9, is it acid or alkaline?

Alkaline

The pH of grapes is 2.90-3.82, is it acid or alkaline?

Acid

pH can only measure solutions that are…

Water Based

The protective film of oily acidic secretions coating and lubricating hair, skin, and scalp is the...

Acid Mantle

T or F? Chemically treated hair needs a more acidic solution to balance it’s internal negative charge.

True

T or F? Wet, normal hair has an equal number of positive and negative ions.

False

On average, alkaline perms carry a pH of

8.5-9.5

Peroxide is often used as an oxidizing agent in permanent tints, and carries a PH of....

3.0-4.0

A high PH causes the inner layer of the hair to swell, which forces the outer __________ layers to stretch.

Cuticle

Hair Shampoos in the 80s tended to be high in…

Alkaline.

What did high in Alkaline shampoo do for the women in the 80s.

High in pH products open up the cuticles of the hair, it swells and causes the hair to be bigger/poofy. (and DRYYY)