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Cosmo Ch. 18

Chemical Texture Services

QuestionAnswer
Chemical services performed on overly porous hair require solutions that are: low pH
More than any other single factor, what determines the ability of the hair to hold curl? elasticity
In permanent waving, the shape and type of curl are determined by the shape and type of rod and the: wrapping method
Rods that produce a tighter curl in the center and looser curl on either side of the strand are: concave rods
The wrapping technique that provides the most control over hair ends and keeps them evenly distributed over the entire length of the rods is a: double flat wrap
The wrap that is used on endpaper folded in half over the hair ends like an envelope is a(n): bookend wrap
All perm wraps begin by sectioning the hair into: panels
In permanent waving , panels of hair are divided into smaller subsections called: base sections
The angle at which a permanent wave rod is positioned on the head is referred to as: base direction
Caution should be used with on-base rod placement to avoid additional: stress and tension on the hair
The two methods of wrapping the hair around a perm rod are: croquignole and spiral
In the croquinole method of wrapping, the hair is wound from: ends to scalp
Once in the cortex, the waving solution breaks the disulfide bonds through a chemcal reaction called: reduction
In permanent waving, the reduction reaction is due to the addition of: hydrogen
The most common reducing agents used are: thioglycolic acids
The main active ingredient or reducing agent in alkaline permanent waves is: ammoium thioglycolate
Most alkaline permanent waves have a pH between: 9.0 and 9.6
Exothermic waves create a chemical reaction that heats the solution and speeds up: processing
Created by: mmosley
 

 



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