#1
Which layer of the hair shaft contains the pigment that gives hair its color?
Cortex
ExplanationCortex contains the pigment responsible for hair color.
#2
Which layer of the hair shaft is composed of overlapping, scale-like cells?
Cuticle
ExplanationCuticle is the layer with overlapping, scale-like cells in the hair shaft.
#3
Which layer of the hair shaft contains the protein keratin?
Cortex
ExplanationCortex contains the protein keratin in the hair shaft.
#4
What chemical process breaks disulfide bonds in the hair?
Relaxing
ExplanationRelaxing is a chemical process that breaks disulfide bonds in the hair.
#5
Which of the following is a common reducing agent used in chemical texture services?
Ammonium thioglycolate
ExplanationAmmonium thioglycolate is a common reducing agent in chemical texture services.
#6
What is the function of a neutralizer in a chemical relaxing service?
To restore pH balance and re-harden the hair
ExplanationNeutralizer restores pH balance and re-hardens hair in chemical relaxing services.
#7
What is the primary ingredient in alkaline permanent wave solutions?
Ammonium thioglycolate
ExplanationAmmonium thioglycolate is the primary ingredient in alkaline permanent wave solutions.
#8
What role does heat play in chemical hair straightening treatments?
It helps break disulfide bonds
ExplanationHeat aids in breaking disulfide bonds during chemical hair straightening treatments.
#9
Which of the following is a potential side effect of chemical texture services?
Hair breakage
ExplanationHair breakage is a potential side effect of chemical texture services.
#10
Which type of hair texture is typically more resistant to chemical services?
Coarse
ExplanationCoarse hair texture is more resistant to chemical services.
#11
What is the purpose of a porosity test before a chemical texture service?
To determine the hair's ability to absorb moisture
ExplanationPorosity test assesses the hair's ability to absorb moisture before chemical texture service.