Compounds made up of carbon, oxygen, hydrogen, nitrogen, and sulfur.
amino acids
Strong chemical side bonds formed when the sulfur atoms in two adjacent protein chains are joined together.
Disulfide bonds
Weak physical side bonds that are the result of an attraction between opposite electrical charges.
Hydrogen bonds
Long, coiled polypeptide chains.
keratin proteins
Chemical bonds that join amino acids together, end-to-end, in long chains.
Peptide bonds
Long chains of amino acids joined together by peptide bonds.
polypeptide chains
Adding wave or curl to the hair is called:
Permanent waving
The tough exterior layer of the hair structure is called the:
cuticle
Which of these is NOT one of the three types of side bonds that cross-link the polypeptide chains that make up the cortex?
Nitrogen
In the restructuring process, coarse, resistant hair with a strong compact cuticle requires a chemical solution that is:
highly alkaline
Which of the side bonds is strongest?
Disulfide bonds
Hydrogen bonds can be broken by:
water or heat
During the client consultation, Citra identifies Holly's hair as mildly porous. With this in mind, which type of perm would be an appropriate choice for Holly?
Acid balanced wave
During the client consultation, Citra discussed the different types of curls that they could achieve, and Holly decided that she would prefer curls that are tighter in the center and looser on the ends. With this in mind, which type of perm rod should Cit
Concave rod
Citra is using the basic permanent wrap method to perm Holly's hair. As Citra divides Holly's hair into panels, how wide should she make them?
Equal to the length of the rod
As Citra perms Holly's hair, she should:
check the nape of the neck for excess moisture prior to neutralizing the hair.
About how long should it take for Holly's hair to process?
Less than 20min
Kimi has moderately long hair. About how long should it take Chelsea to complete Kimi's keratin straightening treatment?
About 2 hours
Although Kimi's hair is curly, it is not tightly coiled. How long should the effects of the keratin straightening treatment last?
3-5 months
After applying the keratin treatment to Kimi's hair and blowdrying it, Chelsea should set her flat iron to what temperature?
450 degrees Fahrenheit
After the service, Chelsea should instruct Kimi to wait _____ before taking a shower.
72 hours
After the service, Chelsea should instruct Kimi to wait _____ before taking a shower.
Hydrogen peroxide
A hydroxide relaxer used in hair straightening is MOST likely to have a pH of:
13.5
When should you perform a strand test for a relaxing service?
Periodically throughout the process
Keratin straightening treatments work by:
fixing the keratin in place in a semipermanent manner
When performing a thio relaxer application to virgin hair,
the hair and scalp must be completely dry.
When performing a thio relaxer retouch, where do you usually begin application of the relaxer?
At the back of the head
Before applying hydroxide relaxer to virgin hair, you part the hair into ____ sections.
Four