Tough exterior layer of the hair. It surrounds the inner layers and protects the hair from damage.

Middle layer of the hair, located directly beneath the cuticle layer. Is responsible for the incredible strength and elasticity of human hair.

INnermost layer of the hair, often called pith or core of the hair. Sometimes missing in fine hair.

Strong chemical side bonds formed when the sulfur atoms in two adjacent protein chains are joined together. Not broken by water.

relitively weak physical side bonds that are the result of an attraction between negative and positive electrical charges (ionic bonds) easily broken by chanes in pH, and they re-form when pH returns to normal.

weak physical side bonds that are also the result of an attraction between opposite electrical charges. Are easily broken by water (wet setting) or heat (thermal styling) and they re-form as the hair dries or cools.

two-step process whereby the hair undergoes a physical change caused by wrapping the hair on perm rods, and then the hair undergoes a chemical change caused by the application of permanent waving solution and neutralizer.

Also known as cold waves, have a pH between 9.0 and 9.6, use ammonium thioglycolate (ATG) as the reducing agent, and process at room temperature without the addition of heat.

Ammonium thioglycolate (ATG)

Is alkaline and is the active ingredient or reducing agent in alkaline perms.

Glyceryl monothioglycolate (GMTG)

The main active ingredient in true acid and acid-balanced waving lotions. Has a low pH.

HAve a pH between 4.5 and 7.0 and require heat to process. They process more slowly then alkaline waves and do not usually produce as firm a curl as alkaline waves.

Has a pH of 7.0 or neautral. Because of their higher pH, they process at room temperature, do not require the added heat of a hair dryer, process more quickly, amd produce firmer curls than true acid waves.

Create an exothermic chemical reaction that heats up the waving solution and speeds up the processing.

Absorbs heat from surroundings. Activated by an outside heat source, usually a conventional hood-type hair dryer.

Perms that use an ingredient that does not evaporate as readily as ammonia, so there is very little odor associated with their use.

use an ingredient other than ATG, such as cysteamine or mercaptamine as the primary reducing agent.

Also known as end wraps. Absorbent papers used to control the ends of the hair when wrapping and winding hair on perm rods.

Help

Options

Term

Cuticle

click to flip

focusNode

Didn't know it?
click below

Knew it?
click below

Don't know

Term

Cortex

Remaining cards (16)

Know

retry

shuffle

restart

0:00

Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

Normal Size Small Size show me how

Perm Wave

Chapter 20

Term	Definition
Cuticle	Tough exterior layer of the hair. It surrounds the inner layers and protects the hair from damage.
Cortex	Middle layer of the hair, located directly beneath the cuticle layer. Is responsible for the incredible strength and elasticity of human hair.
Medulla	INnermost layer of the hair, often called pith or core of the hair. Sometimes missing in fine hair.
Disulfied Bonds	Strong chemical side bonds formed when the sulfur atoms in two adjacent protein chains are joined together. Not broken by water.
Salt Bonds	relitively weak physical side bonds that are the result of an attraction between negative and positive electrical charges (ionic bonds) easily broken by chanes in pH, and they re-form when pH returns to normal.
Hydrogen Bonds	weak physical side bonds that are also the result of an attraction between opposite electrical charges. Are easily broken by water (wet setting) or heat (thermal styling) and they re-form as the hair dries or cools.
Permanent Waving	two-step process whereby the hair undergoes a physical change caused by wrapping the hair on perm rods, and then the hair undergoes a chemical change caused by the application of permanent waving solution and neutralizer.
Alkaline Waves	Also known as cold waves, have a pH between 9.0 and 9.6, use ammonium thioglycolate (ATG) as the reducing agent, and process at room temperature without the addition of heat.
Ammonium thioglycolate (ATG)	Is alkaline and is the active ingredient or reducing agent in alkaline perms.
Glyceryl monothioglycolate (GMTG)	The main active ingredient in true acid and acid-balanced waving lotions. Has a low pH.
True Acid Waves	HAve a pH between 4.5 and 7.0 and require heat to process. They process more slowly then alkaline waves and do not usually produce as firm a curl as alkaline waves.
Acid-Balanced Waves	Has a pH of 7.0 or neautral. Because of their higher pH, they process at room temperature, do not require the added heat of a hair dryer, process more quickly, amd produce firmer curls than true acid waves.
Exothermic Waves	Create an exothermic chemical reaction that heats up the waving solution and speeds up the processing.
Endothermic Waves	Absorbs heat from surroundings. Activated by an outside heat source, usually a conventional hood-type hair dryer.
Ammonia-free Waves	Perms that use an ingredient that does not evaporate as readily as ammonia, so there is very little odor associated with their use.
Thio-free Waves	use an ingredient other than ATG, such as cysteamine or mercaptamine as the primary reducing agent.
End Papers	Also known as end wraps. Absorbent papers used to control the ends of the hair when wrapping and winding hair on perm rods.

Created by: cochran_payton

"Know" box contains:
Time elapsed:
Retries: