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chemical hair servic

cosmetology-milady 2010

the tough exterior layer of the hair structure is called the: cuticle
to change the natural wave pattern of hair, the side bond of what layer of hair must be broken? cortex
the cortex layer of the hair structure is responsible for the hair's: strength and elasticity
another term that is used to described the medulla of the hair structure is the: core
the range of numbers used in the pH scale is: 0 to14
chemical hair texturizers temporarily raise the pH of the hair in order to: soften and swell the shaft
in the restructuring process, coarse, resistant hair w/ a strong compact cuticle requires a chemical solution that is: highly alkaline
chains that are formed by peptide bonds that are linked together are: polypeptide
long, coiled, polypeptide chains that make up approximately 97% of the hair's structure are: keratin proteins
a correct permanent wave service alters only what bonds? side
the building blocks of proteins are: amino acids
chemical-based side bonds that are formed when two sulfur-type chains are joined together are: disulfide
weak physical side bonds that are the result of an attraction between negative and positive electrical charges are: salt
hydrogen bonds are easily broken by water or heat and are re-formed when the hair is: dried
more than any other single factor what determines the ability of the hair to hold a curl? elasticity
in permanent waving, the shape and type of curl are determined by the shape and type of rod and the: wrapping method
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
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 angel at which a permanent wave rod is positioned on the head is referred to as: base direction
the two methods of wrapping the hair around a perm rod are: croquignole and spiral
in the croquignole method of wrapping, the hair is wound from: ends to scalp
once in the cortex the waving solution breaks the disulfide bonds through a chemical 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: ammonium 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
an acid w/ a low pH that is the primary reducing agent in acid waves is: glyceryl monothiolycolate
most acid waves have a pH value between: 7.8 and 8.2
all acid waves have three components consisting of the waving lotion, neutralizer, and: activator
waves that are activated from and outside heat source are considered: endothermic
the most common reducing agents used in thio-free waves are mercaptamine or: cysteamine
hair that has too many disulfide bonds broken and will not hold a firm curl is considered: over-processed
the process of stopping the action of permanents waves and hardening the hair into its new form is: neutralization
two important functions performed during the neutralization process are: deactivates solution and rebuilds disulfide bonds
in a basic perm wrap all rods within a panel move in the same direction, and the base control is: half off
partings and panels that radiate through out the curved areas of the head are used in: curvature perm wraps
the bands of permanent wave rods should be smooth and fastened: straight across the top of the rod
the process of rearranging the basic structure of extremely curly hair into a straighter or smoother form i: chemical hair relaxing
the neutralizer used in thio relaxers is an oxidizing agent, usually: hydrogen peroxide
the active ingredient in all hydroxide relaxers is the: hydrogen ion
hydroxide relaxers remove one atom of sulfur from a disulfide bond, converting it into a(n): lanthionine bond
unlike thio neutralization, the neutralization process of hydroxide relaxers does not involve: oxidation
the application of a sodium hydroxide relaxer causes the hair to; swell and soften
relaxers that contain only one component and are used w/o mixing are: metal hydroxide relaxers
sodium hydroxide relaxers are commonly called: lye relaxers
relaxers that contain two components and must be mixed immediately prior to use are: guanidine hydroxide
relaxers are often marketed and sold as no-mix-no-lye relaxers are: potassium hydroxide
the difference in the strength of most chemical hair relaxers is determined by the concentration of: hydroxide
prior to sodium hydroxide relaxer retouch serve, the hair should never be: shampooed
during a retouch relaxer application, to avoid over-processing or hair breakage, do not: overlap the relaxer
a combination of a thio relaxer and a thio permanent wrapped on large rods is a: soft curl perm
hair that is treated w/ hydroxide relaxers mus not be treated w/: thio relaxers
Created by: angellalf