What is a sodium hydroxide relaxer?
A – Sodium hydroxide (lye) relaxer – used to straighten tightly curled hair. This type of relaxer is alkaline in pH (11.5 to 14), which forces the cuticle to open so that the relaxer can penetrate in the cortex layer of the hair. Once there, the sodium hydroxide breaks down the cross bonds (sulfur and hydrogen).
What is the pH of a hydroxide relaxer?
The pH of a hydroxide relaxer is typically 13 or higher which is considered a high alkaline concentration. Therefore an acid-balanced shampoo must be used to neutralize the hydroxide, and to return the hair and scalp to a normal pH level.
What is important to know before performing a hydroxide relaxer on a client?
– Do not shampoo client’s hair to application of hydroxide relaxer. – Client’s hair and scalp must be completely dry and free from perspiration prior to application of hydroxide relaxer. – Apply a protective base cream to avoid scalp irritation. – wear gloves during the relaxer application.
What are the types of relaxers?
There are three types of relaxers; sodium hydroxide, calcium hydroxide and ammonium thioglycolate. Sodium hydroxide relaxers are commonly called lye relaxers. Lye relaxers can be used on wavy, curly or coily hair.
What pH is lye?
Sodium hydroxide lye has a pH of about 14, putting it at the very top of the pH scale.
How do relaxers work?
Hair relaxers use chemicals to straighten hair by breaking the di-sulfide bonds found in the cortex layer of hair and re-forming them while hair is being held in a straight pattern. The cortex is the layer under your cuticle. It’s made up of twisted ‘cables’ of protein, and it’s this layer on which hair relaxers work.
What is the pH of an acid balanced wave?
Ch. 20 Vocab
| Term | Definition |
|---|---|
| Acid-Balanced Waves | Permanent waves that have a 7.0 or neutral pH; because of their higher pH, they process at room temperature, do not require the added heat of a hair dryer, process more quickly, and produce firmer curls than true acid waves. |
What are the steps to a relaxer?
Terms in this set (13)
- hair/scalp analysis.
- drape client for chemical service.
- divide hair in 4 using clips.
- apply protective cream (entire scalp if sensitive)
- put gloves on both hands.
- begin applying relaxer to back first, using 1/4-1/2 inch partings, apply relaxer to new growth, not touching scalp, no overlap.
What are the 3 types of relaxers?
There are three types of relaxers; sodium hydroxide, calcium hydroxide and ammonium thioglycolate. Sodium hydroxide relaxers are commonly called lye relaxers.
How do hydroxide relaxers straighten the hair?
How do hydroxide relaxers straighten the hair? In lanthionization, the process by which hydroxide relaxers permanently straighten the hair, the relaxers remove a sulfur atom from a disulfide bond and convert it into a lanthionine bond.
What is the main function of sodium hydroxide?
Sodium hydroxide is useful for its ability to alter fats. It is used to make soap and as a main ingredient in household products such as liquid drain cleaners. Sodium hydroxide is usually sold in pure form as white pellets or as a solution in water.
What are metal hydroxide relaxers?
Metal hydroxide relaxers are ionic compounds formed by a metal, sodium (Na), potassium (K), or lithium (Li), which is combined with oxygen (O) and hydro- gen (H). Metal hydroxide relaxers include sodium hydroxide (NaOH), potassium hydroxide (KOH), and lithium hydroxide (LiOH).
What chemicals are in a relaxer?
In this process, lye is the active ingredient. Lye is a mixture of sodium hydroxide, water, petroleum jelly, mineral oil and emulsifiers. This relaxer is absorbed by the hair’s proteins and weakens the bonds rather than breaking them. The curls are then loosened as the hair fibre swells open.
What are low pH waves?
Low pH waves. Perms that use sulfates, sulfites, and bisulfites as an alternative to ammonium thioglycolate; they have a low pH. Metal Hydroxide Relaxers. Ionic compounds formed by a metal (sodium, potassium, or lithium) which is combined with oxygen and hydrogen. Permanent waving.
What is the pH of perm solution?
Alkaline perm has a pH balance of between 8.2 and 9.6 while Acid perm has a pH balance of between 4.5 and 6.5. 5. Alkaline perm is stronger and is good for coarse and thick hair while Acid perm is gentler and good for damaged hair.