Hair Bonds & Chemistry
What type of bond connects amino acids end-to-end to form polypeptides?
Peptide Bonds
A solution with a pH of 6 is considered (acidic, neutral, or alkaline)?
Acidic
What ingredient is found in most alkaline relaxers?
Sodium Hydroxide (Lye)
What process rearranges straight hair into curly or wavy form?
Permanent Waving
Wrapping hair at an angle other than parallel to the rod is called what?
Spiral Wrap
Which bond is responsible for strength and elasticity in the hair?
Side bonds (Cross Bonds)
What does pH stand for?
Potential Hydrogen
What is the process of chemically restoring disulfide bonds called?
Rebonding
Which type of wave is processed with heat and has a pH range of 4.5-7?
True Acid Waves
What is the position of the perm rod in relation to its base section called?
Base Direction
Which bond can only be broken by chemical solutions?
Disulfide Bonds
When a substance cannot mix with another, it is called what?
Immiscible
What type of relaxer is advertised as "no-lye" and gentler for sensitive skin?
Guanidine Hydroxide
Which perm rod creates uniform curls with the same diameter along the entire length?
Straight Rod
Which wrap technique uses two rods on one strand of hair?
Piggyback Wrap (Double Rod Wrap)
Occupational disease in cosmetology is usually caused by what?
Overexposure to products or ingredients
What type of shampoo is used to remove any remaining chemicals after a relaxer?
Neutralizing shampoo
Which relaxer uses ammonium thioglycolate?
Thio relaxers (Ammonium Thioglycolate)
Which rod is long, plastic, and used to create spiral curls?
Circle Rods
What term describes the hair's ability to absorb liquid?
Porosity
What type of bond reforms when hair cools or dries?
Hydrogen Bond
What is the protective cream applied to the scalp before chemical relaxers called?
Base cream
What chemical is flammable, pungent, and present in many beauty products but can be dangerous?
Formaldehyde
Which wave requires heat and has a main ingredient of glycerol monothioglycolate?
True Acid Waves
What perm wrap consists of partings that follow the guest's head shape?
Curvature Perm Wrap