Chemical Texture Services in Cosmetology
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Questions and Answers

What is the primary benefit of chemical texture services for clients?

  • They are suitable for all hair types without exceptions.
  • They reduce the need for regular maintenance.
  • They allow for a variety of styling options. (correct)
  • They can change hair color permanently.

    • Why is it important for cosmetologists to study chemical texture services?

  • To build a trusting clientele and offer services confidently. (correct)
  • To specialize in haircutting techniques.
  • To perform color treatments more effectively.
  • To eliminate the need for hair care products.

    • Which of the following is NOT a type of chemical texture service?

  • Permanent Waving
  • Relaxing
  • Hair Coloring (correct)
  • Curl Re-forming

    • What can happen if a cosmetologist lacks understanding in chemistry regarding chemical texture services?

    <p>They could potentially damage hair or cause hair loss.</p> Signup and view all the answers

    What is a key characteristic of all chemical texture services?

    <p>They chemically and physically alter hair structure.</p> Signup and view all the answers

    What is the primary responsibility of the cortex in hair?

    <p>Contributes to strength and elasticity</p> Signup and view all the answers

    What is the natural pH range of hair?

    <p>4.5 to 5.5</p> Signup and view all the answers

    Which type of hair requires a highly alkaline solution for texture services?

    <p>Coarse, resistant hair</p> Signup and view all the answers

    What type of bonds join amino acids together to form polypeptide chains?

    <p>Peptide bonds</p> Signup and view all the answers

    What layer of hair is primarily involved in protecting inner layers?

    <p>Cuticle</p> Signup and view all the answers

    Which type of bond is NOT mentioned as a side bond in hair structure?

    <p>Peptide bonds</p> Signup and view all the answers

    What is the primary function of side bonds in the cortex of hair?

    <p>Provide elasticity and strength</p> Signup and view all the answers

    Which pH state indicates a chemical solution is alkaline?

    <p>pH above 7</p> Signup and view all the answers

    Which process only alters the side bonds of the hair?

    <p>Permanent waving</p> Signup and view all the answers

    Keratin proteins are characterized by which of the following features?

    <p>Long, coiled polypeptide chains</p> Signup and view all the answers

    What is the first step in the permanent waving process?

    <p>Wrapping hair on perm rods</p> Signup and view all the answers

    How do alkaline waves differ from true acid waves?

    <p>Alkaline waves have a higher pH compared to true acid waves</p> Signup and view all the answers

    What is the main purpose of neutralization in permanent waving?

    <p>To halt the chemical process and restore the hair's natural pH</p> Signup and view all the answers

    Which type of bond is primarily responsible for forming curls in permanent waving?

    <p>Disulfide bonds, as they provide structural integrity</p> Signup and view all the answers

    Which bond is least affected by changes in pH during permanent waving?

    <p>Disulfide bonds</p> Signup and view all the answers

    What is the purpose of the elasticity test before a permanent wave?

    <p>To assess suitable curl size and rod type</p> Signup and view all the answers

    What is the pH level of alkaline permanent waving solutions?

    <p>9.4</p> Signup and view all the answers

    Which of the following statements about acid-balanced permanent waving solutions is true?

    <p>They have a pH of 7.5 and cause less cuticle swelling</p> Signup and view all the answers

    What chemical reaction occurs in the cortex during the permanent waving process?

    <p>Hydrogen is added, breaking disulfide bonds</p> Signup and view all the answers

    Which diagram illustrates hair treated with an alkaline permanent waving solution?

    <p>Figure 20-12</p> Signup and view all the answers

    What is the primary function of a reducing agent in permanent waves?

    <p>To break disulfide bonds in polypeptide chains</p> Signup and view all the answers

    Which pH level range corresponds to an alkaline/cold wave?

    <p>9.0-9.6</p> Signup and view all the answers

    What effect do alkaline solutions have on resistant hair?

    <p>They add swelling to aid processing</p> Signup and view all the answers

    What can happen to porous hair when using alkaline solutions?

    <p>It may become damaged</p> Signup and view all the answers

    What is the best practice regarding the pH level of perm solutions?

    <p>It should match the hair's cuticle resistance and strength</p> Signup and view all the answers

    What happens when hair is overprocessed during permanent waving?

    <p>It may appear straighter and have a weak curl pattern.</p> Signup and view all the answers

    What is a characteristic of underprocessed hair?

    <p>It may appear straight or have a very weak curl.</p> Signup and view all the answers

    What results from breaking too many disulfide bonds in hair processing?

    <p>The hair may become straight and damaged.</p> Signup and view all the answers

    What is the ideal level of disulfide bonds that should be broken for a properly processed permanent wave?

    <p>Approximately 50 percent of the bonds.</p> Signup and view all the answers

    How does the strength of hair typically vary from scalp to ends?

    <p>The hair is stronger at the scalp than at the ends.</p> Signup and view all the answers

    What is the pH range of alkaline waves?

    <p>9.0 to 9.6</p> Signup and view all the answers

    What is the main active ingredient in true acid waves?

    <p>Glyceryl monothioglycolate</p> Signup and view all the answers

    How do modern acid-balanced waves compare to traditional true acid waves?

    <p>They have a higher pH and process more quickly</p> Signup and view all the answers

    What is the consequence of repeated exposure to GMTG?

    <p>It can lead to allergic sensitivity</p> Signup and view all the answers

    What is the pH level considered neutral for hair?

    <p>5.0</p> Signup and view all the answers

    What type of chemical reaction do exothermic waves create?

    <p>An exothermic reaction</p> Signup and view all the answers

    What effect does a pH of 7.0 have on hair during a true acid wave?

    <p>It can cause the hair to swell</p> Signup and view all the answers

    What is the function of the activator in acid waves?

    <p>To act as a reducing agent</p> Signup and view all the answers

    What is the recommended hair type for an alkaline/cold wave permanent wave?

    <p>Coarse, thick, or resistant hair</p> Signup and view all the answers

    Which ingredient is used in true acid waves?

    <p>Glyceryl monothioglycolate</p> Signup and view all the answers

    What is the pH range for low-pH waves?

    <p>6.5 to 7.0</p> Signup and view all the answers

    In what situation might a weaker solution be required during permanent wave processing?

    <p>When the hair appears over-processed</p> Signup and view all the answers

    Which type of permanent wave is suggested for extremely porous or very damaged hair?

    <p>True acid wave</p> Signup and view all the answers

    What is the primary characteristic of exothermic waves?

    <p>They require a high temperature to process</p> Signup and view all the answers

    What process is typically associated with acid-balanced waves?

    <p>Room temperature process</p> Signup and view all the answers

    What is the active ingredient in a thio-free wave?

    <p>Mercaptamine</p> Signup and view all the answers

    What key process occurs in endothermic waves?

    <p>Heat is absorbed from surroundings to process hair.</p> Signup and view all the answers

    Which ingredient is commonly found in ammonia-free waves?

    <p>Aminomethylpropanol (AMP)</p> Signup and view all the answers

    What is a common misconception about thio-free waves?

    <p>They can be harmful at high concentrations.</p> Signup and view all the answers

    Why are low-pH waves not very popular?

    <p>They yield less effective results on resistant hair.</p> Signup and view all the answers

    What is vital for selecting the appropriate perm type for a client?

    <p>The client's hair texture and condition.</p> Signup and view all the answers

    What safety precaution should be taken when using permanent waving solutions?

    <p>Always consult the manufacturer's instructions and MSDS.</p> Signup and view all the answers

    What can happen if the contents of the oxidizer tube are mixed incorrectly?

    <p>Create a violent chemical reaction.</p> Signup and view all the answers

    Which of the following statements about endothermic waves is true?

    <p>An oxidizing agent is used in the solution.</p> Signup and view all the answers

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