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chapter 18
chemical texture services-exam review
| Question | Answer |
|---|---|
| permanent waving, relaxing, and curl reformation are all examples of ____ services | chemical texture |
| what is the potential hydrogen (pH) of natural hair? | 4.5-5.5 |
| true or false? carse hair with a compact cuticle layer requires a highly acidic chemical solution | false (alkaline... not acidic) |
| a ___ bond is the strongest side bond, that can only be broken by chemical services. they are the least abundant side bond | disulfide |
| ____ bonds are weak bonds that can be broken by changes in pH. there are an abundance of them | salt |
| ____ bonds are the weakest side bond. they are the most abundant, and can be broken by heat and water | hydrogen |
| a ___ bond is strong chemical bond thats formed when sulfur atoma in a adjacent protein are joined together | disulfide |
| ___ bonds are weak physical side bonds. they are a result of an attraction between negative and positive electrical charges | salt |
| ____ side bonds are weak physical bonds. they are a result of an attraction between opposite electrical charges. | hydrogen |
| each side bond accounts for ____ of the overall strength of the hair | 1/3rd |
| in order to find out why a client wants a texture service, and what results thay are expecting, what type of questions should you ask that require more than just a "yes" or "no" answer? | open ended questions |
| the condition, texture, and ____ of the hair must be evaluated in order to determine if the desired style is posible | wave pattern |
| how can you test hair for metallic salts? | mix 1oz of 20 volume peroxide with 20 dropsof 28% amonia. immerse at least 20 strands of hair int he solution for 30 mins. if the salts aren'tpresent, the hair willlighten slightly. |
| please define texture as it partains to this chapter | coarse, medium, or fine(the fabric of hair you're working with) |
| what type of hair usually requires more processing time and is usually more resistant to that processing? | coarse hair |
| what type of hair processes easily and is more susceptible to damage from chemical texture services? | fine |
| define porosity | the ability of hair to absorb moisture. it's directly related to the condition of the cuticle layer |
| what type of rods are most commonly used to produce a tighter curl in the center and looser curl on either side? | concave rods |
| ____ is the main ingredient in alkaline perms and thio relaxers | ATG |
| true or false? GMTG is the main ingredient in acid waves | true |
| describe te difference between endothermid and exothermic waves | exothermic- create an exothermic chemical reaction that heats up the solution, and speeds up the processing time endothermic- it's activated by outside heat sources; usually a conventional hood-type dryer |
| what type of hair are alkaline perms recommended for? | coarse,thick, or resistant |
| what effect can perm solution have on colored hair if not properly rinsed? | scalp irritation, and unwanted lightening of the hair |
| what is another name for a bsaic perm wrap? | straight set wrap |
| describe curvature perm | the movement curves within sectioned out panels. the parts and bases radiate throughout the panels to follow the curvature of the head |
| chemical hair relaxers rearrange the structure of curly hair into a ____ or ____ form | stright or smoother |
| the most common type of chemical relaxers are hydroxide and ____ | thio (ammonium thioglycolate) |
| true or false? disulfide bonds cannot be rebuilt with a thio relaxer | false |
| what pH does thio relaxers have on the pH scale? | 10 |
| what pH does hydroxide relaxers have on the pH scale? | 12 to 13 |
| ____ is when hydroxide relaxers remove a sulfur atom from a disulfide bond, converting it into a Ianthionine bond | Ianthionization |
| what relaxers are the oldest and most commonly used, that are also known as lye relaxers? | sodium hydroxide (NaOH) |
| which type of relaxer completely straightens the hair? | guanidine hydroxide relaxers |
| whats the difference between a base relaxer and a no base relaxer? | base relaxer require application of protective base cream to the entire scalp prior to application of the relaxer, and no base relaxer doesnt require application of protective base cream |
| what is the name of the soft curl permanent that was named after beauty pioneered Jheri Redding? | Jheri curl or simply a curl |
| true or false? hair that has been treated with metallic salts can be relaxed | false (they CAN NOT be relaxed) |
| processing time is determined by what 4 things? | 1. strength of the relaxer 2. hair type 3. hair condition 4. desired result |
| what strength relaxer should be used on very coarse, extremely curly, and resistant hair for maximum straightening? | super-strength relaxers |
Created by:
coris20
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