Texas Cosmetology Operator Written ExamHair Care ServicesMedium
A cosmetologist is preparing to apply a permanent hair color and needs to assess the hair's ability to absorb moisture and chemicals. What characteristic of the hair is the cosmetologist testing?
- ADensity
- BPorosity
- CTexture
- DElasticity
Show answer & explanationAnswer & explanation
Correct answer: B. Porosity
Porosity refers to the hair's ability to absorb moisture and chemicals. It determines how quickly hair color will be absorbed and how long it will last.
Why the other options are wrong
- A. Density refers to the number of individual hair strands on one square inch of scalp.
- C. Texture refers to the thickness or diameter of an individual hair strand (fine, medium, coarse).
- D. Elasticity is the hair's ability to stretch and return to its original length without breaking.
Hair Porosity
The ability of the hair to absorb moisture and chemicals, determined by the condition of the cuticle layer.
- Affects color absorption
- Influences processing time
- Can be low, normal, or high
- Tested by floating a strand in water
Memory trick: Porosity is like a 'Porous' sponge, how much it soaks up.