Perm and relaxer chemistry, hair coloring processes, and chemical safety precautions tested on cosmetology state board exams.
40 cards · basic cards · AI-written, checked twice. Edit anything.
- What is the normal pH range of healthy hair and skin?
- 4.5 to 5.5
- On the pH scale, ____ is considered the neutral point.
- 7
- What is the typical pH range of alkaline (cold wave) perm solutions?
- 8.0 to 9.5
- What is the main active ingredient in alkaline perm solutions?
- Ammonium thioglycolate
- What is the typical pH range of true acid perm solutions?
- 4.5 to 7.0
- What is the main active ingredient in true acid perm solutions?
- Glyceryl monothioglycolate
- What chemical process breaks the hair's disulfide bonds during a perm?
- Reduction
- What is the purpose of the neutralizer step after a perm?
- It rebuilds (re-oxidizes) the disulfide bonds in their new curved shape
- Name a common oxidizing agent used in perm neutralizers.
- Hydrogen peroxide (or sodium bromate)
- How does an exothermic perm generate processing heat?
- A chemical reaction within the solution itself produces heat
- How does an endothermic perm generate processing heat?
- From an outside heat source, such as a hood dryer or processing machine
- What is the purpose of a pre-perm test curl?
- To determine the correct processing time and expected curl result
- How does higher hair porosity affect perm processing time?
- It shortens processing time because the cuticle absorbs solution faster
- What is a concentric wrapping pattern used for?
- Base sections that curve around the head, suited to round or oval head shapes
- Sodium hydroxide relaxers are also known as ____ relaxers.
- lye