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Cosmetology

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Term
Definition
acid-balanced waves   not true acid waves, as they have a ph between 7.8 and 8.2 and use glyceryl monthioglycolate(GMTG)as the primary reducing agent acid-balanced waves process at room temperature,do not require the added heat of a hair dryer,process more quickly  
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alkaline waves   have a ph between 9.0 and 9.6, use ammonium thioglycolate(ATG)as the reducing agent, and process at room temperature.  
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amino acids   small compounds that are made of carbon, nitrogen, oxygen, hydrogen, and sometimes sulfur  
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ammonia-free waves   perms use alkanolamines instead of ammonia, and are popular because of their low odor.  
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ammonium thioglycolate (ATG)   active ingredient or reducing agent in alkaline permanents  
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base control   position on the rod in relation to its base section, determined by the angle at which the hair is wrapped.  
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base cream   oily cream used to protect the skin and scalp during hair relaxing  
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base direction   the angle at which the tool is positioned on the head also the directional pattern in which the hair is wrapped  
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base placement   the position of the rod in relation to its base section, and is determined by the angle at which the hair is wrapped. rods can be wrapped on base, half off base, or off base.  
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base relaxers   relaxers that require the application of protective base cream to the entire scalp prior to the application of the relaxer  
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base sections   subsections of panels into which hair is divided for perm wrapping;one rod is normally placed on each base section.  
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basic permanent wrap   straight set wrap; perm wrapping pattern in which all the rods within a panel move in the same direction and are positioned on equal sized bases all the base sections are horizontal, and are the same length and width as perm rod  
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bookend wrap   perm wrap in which one end paper is folded in half over the hair ends like an envelope.  
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bricklay permanent wrap   perm wrap similar to actual technique of bricklaying; base sections are offset from each other row by row to prevent noticeable splits and to blend the flow of the hair  
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chemical hair relaxing   rearranges the structure of curly hair into a straighter or smoother form.  
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chemical texture services   hair services that cause a chemical change that permanently alters the natural wave pattern of the hair.  
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concave rods   perm rods that have a smaller diameter in the center that increases to a larger diameter on the ends.  
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croquignole perm wrap   perms in which the hair strands are wrapped from the ends to the scalp in overlapping concentric layers.  
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curvature permanent wrap   perm wrap in which partings and bases radiate throughout the panels to follow the curvature of the head  
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double flat wrap   one end paper is placed under and one end paper is placed over the strand of hair being wrapped  
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double-rod wrap   also known as piggyback wrap; a wrap technique whereby extra long hair is wrapped on one rod from the scalp to midway down the hair shaft, and another rod is used to wrap the remaining hair strand in the same direction.  
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end papers   end wraps; absorbant papers used to control the end  
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endothermic waves   perm activated by an outside heat source usually a conventional hood type hair dryer  
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exothermic waves   creates an exothermic chemical retion that heats up the solution and speeds up the processing  
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glyceryl monothioglycolate (GMTG)   main active ingredient in true acid and acid-balanced waving lotions  
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half off-base placement   base control where the hair is wrapped at an angle of 90 degrees (perpendicular) to its base section and the tool is positioned half off its base section  
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hydroxide neutralization   the neutralization of hydroxide relaxers is an acid-alkali neutralization reaction that neutralizes (deactivates) the alkaline residues left in the hair by the hydroxide relaxer and lowers the pH of the hair andd scalp.  
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hydroxide relaxers   very strong alkalis with a pH over 13. The hydroxide ion is the active ingredient in all hydroxide relaxers  
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keratin protiens   long, coiled polypeptide chains  
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lanthionization   process by which hydrogen relaxers permanently straighten hair; breaks the hair's disulfide bonds during processing and converts them to lanthioine bonds when the relaxer is rinsed from the hair  
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loop rod   Tool that is usually about 12 inches long with a uniform diameter along the entire length of the rod.  
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low-pH waves   perms that work at a low pH and use sulfates, sulfites, and bisulfites as an alternative to ammonium  
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metal hydroxide relaxers   ionic compounds formed by a metal (sodium,potassiun, or lithium) combined with oxygen and hydrogen  
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no-base relaxers   relaxers that do not require application of a protective base cream  
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normalizing lotions   conditioners that restore the hair's natural pH after a hyroxide relaxer prior to shampooing  
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off-base placement   base control in which the hair is wrapped at an angle 45 degrees below perpendicular to its base section and the tool is positioned completely off its base section  
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on-base placement   base control in which the hair is wrapped at a 45-degree angle beyond perpendicular to its base section and the rod is positioned on its base section  
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peptide bonds   The bonds connecting amino acids together to form polypeptide chains.  
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permanent waving   a two step process whereby the hair undergoes a physical change caused by wrapping the hair on perm rods and then hair undergoes a chemical change caused by the application of permanent waving solution and neutralizer  
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polypeptide chains   long chains of amino acids joined together by peptide bonds  
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single flat wrap   perm wrap similar to double flat wrap but uses only one end paper, placed over the top of the strand of hair being wrapped  
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soft bender rods   tool about 12 inches long with a uniform diameter along the entire length. These soft foarm rods hace a stiff wire inside that permits them to be bent in to almost any shape  
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soft curl permanent   combination of a thio relaxer and a thio permanent wrapped on large rods to make existing curl larger or looser  
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spiral perm wrap   hair is wrapped at an angle other than perpendicular to the length of the rod, which causes the hair to spiral along the length of the rod, similar to the grip on a tennis racket  
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straight rods   perm rods that are equal in circumference along their entire length or curling area  
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thio neutralization   stops the action of a permanent wave solution and rebilds the hair in its new curly form  
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thio relaxers   use the same ammonium thioglycolate (ATG) that is used inpermanent waving, but at a higher concentration and a higher pH (above 10)  
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thio-free waves   perm that uses cysteamine or mercaptamine instead of ammonium thioglycolate as the primary reducing agent  
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true acid waves   perms that have a pH between 4.5 and 7.0 and require heat to speed the processing, process more slowly than alkaline waves and do not usually produce as firm a curl  
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viscosity   the thickness of a fluid or a fluid's resistance to flow  
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weave technique   wrapping technique that uses zigzag partings to divide base areas  
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