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OR Cosmetology practice questions

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Question 1Cosmetology theory and practice (official domain list not published in source)

In the OR cosmetology curriculum, which layer of the hair structure contains the melanin that determines natural color?

  1. The cuticle
  2. The follicle sheath
  3. The cortex Correct answer.
  4. The medulla

Explanation

Melanin granules are deposited in the cortex, the thick middle layer that also gives hair its strength and elasticity. Cuticle scales protect the cortex but do not carry the pigment that defines natural color.

Question 2Cosmetology theory and practice (official domain list not published in source)

A client's hair is classified as having a coarse texture. Which characteristic best describes this classification?

  1. Each strand has a small diameter and feels silky
  2. Each strand has a large diameter and feels wiry Correct answer.
  3. The hair has a tight curl pattern
  4. The hair has low porosity

Explanation

Texture describes the diameter of an individual strand, so coarse hair has a wide diameter and a rough, wiry feel. Curl pattern and porosity are separate properties that can occur with any texture.

Question 3Cosmetology theory and practice (official domain list not published in source)

What is the pH range of a typical hair relaxer (sodium hydroxide) product?

  1. pH 11.5 to 14 Correct answer.
  2. pH 4.5 to 5.5
  3. pH 9.0 to 9.5
  4. pH 7.0 to 7.5

Explanation

Sodium hydroxide relaxers are strongly alkaline, typically pH 11.5 to 14, which is what breaks the disulfide bonds. Acid-balanced and neutral products sit in the lower ranges and do not straighten hair.

Question 4Cosmetology theory and practice (official domain list not published in source)

Which of the following is the primary active ingredient in a thio-based (no-lye) relaxer?

  1. Ammonium thioglycolate Correct answer.
  2. Hydrogen peroxide
  3. Guanidine hydroxide
  4. Sodium hydroxide

Explanation

Thio relaxers use ammonium thioglycolate to reduce disulfide bonds, similar to the chemistry of permanent waving. Sodium hydroxide and guanidine hydroxide are different relaxer chemistries.

Question 5Cosmetology theory and practice (official domain list not published in source)

A client with a hydrogen peroxide developer of 20 volume is being lightened. What approximate percentage of hydrogen peroxide does 20 volume contain?

  1. 12 percent
  2. 6 percent Correct answer.
  3. 3 percent
  4. 9 percent

Explanation

Volume and percentage are two notations for the same concentration; roughly 20 volume equals 6 percent hydrogen peroxide. Each 10 volume corresponds to about 3 percent.

Question 6Cosmetology theory and practice (official domain list not published in source)

Which color theory principle explains why a blue-based toner neutralizes unwanted orange tones in lightened hair?

  1. Analogous colors blend smoothly
  2. Complementary colors cancel each other Correct answer.
  3. Monochromatic colors create depth
  4. Triadic colors balance evenly

Explanation

Colors opposite each other on the color wheel are complementary, and mixing them neutralizes both. Blue sits opposite orange, so a blue-based toner cancels orange brassiness.

Question 7Cosmetology theory and practice (official domain list not published in source)

What is the primary function of the arrector pili muscle in the skin?

  1. To supply blood to the hair bulb
  2. To generate new hair cells
  3. To produce sebum for the follicle
  4. To contract and cause the hair to stand up Correct answer.

Explanation

The arrector pili is a small muscle attached to the follicle that contracts in response to cold or emotion, raising the hair. Sebum production and cell division belong to other structures.

Question 8Cosmetology theory and practice (official domain list not published in source)

During a scalp massage, which direction should the movements generally follow to support circulation and comfort?

  1. Downward from the crown toward the nape
  2. Side to side across the temples only
  3. Random circular motions over the entire scalp
  4. Upward from the nape toward the crown Correct answer.

Explanation

Scalp massage typically moves from the nape upward toward the crown, following the direction of venous return and avoiding pulling the hair against its growth. Consistent, gentle pressure improves comfort and circulation.

Question 9Cosmetology theory and practice (official domain list not published in source)

Which of the following describes the correct procedure for draping a client for a shampoo service?

  1. Wrap the cape over the shoulders without a towel
  2. Place a towel under the cape at the neckline and secure the cape Correct answer.
  3. Use only a neck strip without a cape
  4. Place the cape directly on the skin and tuck it into the collar

Explanation

A towel under the cape at the neckline absorbs moisture and protects the client's clothing while the cape is secured. The cape should not touch skin directly, and a neck strip alone does not protect clothing.

Question 10Cosmetology theory and practice (official domain list not published in source)

Which of the following best describes the purpose of a patch test before applying a new hair color product?

  1. To identify a possible allergic reaction to the product Correct answer.
  2. To check the color result before full application
  3. To measure the porosity of the hair
  4. To determine the processing time needed

Explanation

A patch test screens for an allergic reaction by applying a small amount of product to the skin and observing for redness or swelling. It does not predict color outcome, timing, or porosity.

Question 11Cosmetology theory and practice (official domain list not published in source)

A client with a round face shape wants a haircut that creates the illusion of length. Which approach best supports this goal?

  1. Add volume at the sides and keep the length at the jaw
  2. Cut a blunt fringe straight across the forehead
  3. Add height at the crown and keep the sides close Correct answer.
  4. Create a wide, horizontal fringe at the brow

Explanation

Height at the crown draws the eye upward and narrows the face visually, while close sides reduce width. Adding volume at the sides or horizontal lines emphasizes roundness.

Question 12Cosmetology theory and practice (official domain list not published in source)

Which of the following is the correct definition of elevation (projection) in haircutting?

  1. The length of the hair after cutting
  2. The direction the hair grows from the scalp
  3. The thickness of the hair strand
  4. The angle at which the hair is held relative to the head Correct answer.

Explanation

Elevation, also called projection, is the angle at which hair is held away from the head before cutting. It controls the amount of graduation or layering in the finished shape.

Question 13Cosmetology theory and practice (official domain list not published in source)

Which haircutting line is used to create a graduated or stacked effect?

  1. Vertical line
  2. Curved line
  3. Horizontal line
  4. Diagonal line Correct answer.

Explanation

Diagonal lines combine horizontal and vertical directions and build weight or graduation when used with elevation. Horizontal lines build one-length weight, and vertical lines remove weight.

Question 14Cosmetology theory and practice (official domain list not published in source)

What is the main purpose of using a lower pH (acid-balanced) shampoo after a color service?

  1. To help close the cuticle and reduce color fading Correct answer.
  2. To lift the hair's natural pigment
  3. To increase the hair's porosity
  4. To open the cuticle and remove color

Explanation

Acid-balanced shampoos have a pH close to the hair's natural range, which helps smooth the cuticle and slow color loss. High-alkaline products open the cuticle and accelerate fading.

Question 15Cosmetology theory and practice (official domain list not published in source)

Which of the following best describes the function of a conditioner's cationic surfactants?

  1. They raise the pH to open the cuticle
  2. They remove natural oils from the scalp
  3. They bond to negatively charged hair and smooth the cuticle Correct answer.
  4. They deposit pigment into the cortex

Explanation

Hair carries a negative charge, so cationic surfactants in conditioner attach to it, reducing static and smoothing the cuticle. They do not open the cuticle, strip oils, or add pigment.

Question 16Cosmetology theory and practice (official domain list not published in source)

A client wants a perm with firm, long-lasting curls. Which rod choice and wrapping technique best supports this outcome?

  1. Large rods wrapped loosely with overlapping hair
  2. Large rods wrapped with even tension and low elevation
  3. Small rods wrapped loosely with uneven ends
  4. Small rods wrapped with firm, even tension Correct answer.

Explanation

Smaller rods produce tighter curls, and firm, even tension ensures the wave forms uniformly along the strand. Loose wrapping or overlapping hair creates uneven, weak curl formation.

Question 17Cosmetology theory and practice (official domain list not published in source)

Which of the following describes the purpose of a neutralizer in a permanent wave service?

  1. To rebuild disulfide bonds into their new shape Correct answer.
  2. To add moisture to the cortex
  3. To remove product residue from the scalp
  4. To swell the hair and open the cuticle

Explanation

The reducing agent breaks disulfide bonds, and the neutralizer (often a hydrogen peroxide or bromate solution) rebuilds them in the new curl configuration. Swelling and cleansing are separate steps.

Question 18Cosmetology theory and practice (official domain list not published in source)

Which of the following is the correct sequence for a basic manicure service?

  1. Shape nails, soak, push back cuticles, massage, polish Correct answer.
  2. Polish, push back cuticles, soak, shape nails, massage
  3. Massage, shape nails, polish, soak, push back cuticles
  4. Soak, polish, shape nails, massage, push back cuticles

Explanation

A standard manicure shapes the nails, softens the cuticles with soaking, gently pushes them back, massages the hand and arm, then applies polish. Following this order protects the client and produces a clean finish.

Question 19Cosmetology theory and practice (official domain list not published in source)

Which of the following best describes the cause of a bacterial infection commonly called a stye?

  1. A viral infection of the eyelid margin
  2. An inflammation of an oil gland at the eyelid margin Correct answer.
  3. A fungal infection of the eyelash follicle
  4. An allergic reaction to cosmetics

Explanation

A stye is an inflamed oil gland at the eyelid margin, usually caused by a bacterial infection. It is not viral, fungal, or an allergic reaction, so it should be referred to a physician.

Question 20Cosmetology theory and practice (official domain list not published in source)

Which of the following describes the correct disinfection procedure for nonporous implements after use?

  1. Rinse with water and store in a closed drawer
  2. Spray with a sanitizer and air dry for one minute
  3. Wipe with a dry towel and reuse immediately
  4. Clean with soap and water, then immerse in an EPA-registered disinfectant for the labeled contact time Correct answer.

Explanation

Implements must first be cleaned of debris, then fully immersed in an EPA-registered hospital-grade disinfectant for the contact time on the label. Sanitizing alone does not kill all pathogens on implements.

Question 21Cosmetology theory and practice (official domain list not published in source)

A client with a contagious skin condition arrives for a facial. What is the appropriate action for the cosmetologist?

  1. Shorten the service to reduce contact time
  2. Treat the area with an antiseptic and continue
  3. Refuse the service and refer the client to a physician Correct answer.
  4. Proceed with the service using gloves

Explanation

Contagious skin conditions are contraindications for service because they can spread to the cosmetologist and other clients. The professional response is to decline the service and refer the client for medical care.

Question 22Cosmetology theory and practice (official domain list not published in source)

Which of the following best explains why a strand test is performed before a lightening service?

  1. To determine how the hair will respond to the product and estimate processing time Correct answer.
  2. To decide which shampoo to use afterward
  3. To check the client's allergy history
  4. To confirm the price of the service

Explanation

A strand test shows how the hair reacts to the lightener, including timing and the resulting tone, so the full service can be adjusted safely. Allergy history is addressed with a patch test, not a strand test.

Question 23Cosmetology theory and practice (official domain list not published in source)

A client's hair is highly porous and previously lightened. Which approach best minimizes damage during a new color application?

  1. Skip the strand test to save time
  2. Apply a high-volume developer for maximum lift
  3. Apply the lightener to dry, unwashed hair and leave it unmonitored
  4. Use a low-volume developer and monitor processing closely Correct answer.

Explanation

Highly porous hair absorbs and releases pigment quickly, so a low-volume developer and close monitoring reduce the risk of overprocessing. High volume or skipping the strand test increases damage.

Question 24Cosmetology theory and practice (official domain list not published in source)

A cosmetologist notices that a client's nails show a dark streak under the nail plate that has widened over several months. What is the most appropriate response?

  1. Apply a dark polish to conceal it
  2. Treat it with a cuticle oil regimen
  3. Recommend the client see a physician for evaluation Correct answer.
  4. Buff the nail plate to lighten the streak

Explanation

A widening dark streak under the nail can indicate a serious medical condition and is outside the scope of cosmetology. The professional response is to refer the client to a physician rather than conceal or treat it.

Question 25Cosmetology theory and practice (official domain list not published in source)

Which of the following best explains the relationship between the hair's pH and the action of an alkaline permanent wave solution?

  1. Alkaline solutions close the cuticle and block the reducing agent
  2. Acidic solutions swell the cuticle and speed bond breaking
  3. Alkaline solutions swell the cuticle and allow the reducing agent to reach the cortex Correct answer.
  4. Neutral solutions break disulfide bonds without swelling

Explanation

The alkalinity of a permanent wave solution swells the hair and opens the cuticle so the reducing agent can reach the cortex and break disulfide bonds. Acidic or neutral solutions do not produce this swelling effect.

Question 26Cosmetology theory and practice (official domain list not published in source)

Which layer of the hair shaft contains the melanin that determines natural hair color?

  1. The medulla
  2. The cuticle
  3. The cortex Correct answer.
  4. The inner root sheath

Explanation

The cortex is the thick middle layer of the hair shaft and holds the melanin pigment granules that give hair its natural color. Chemical services such as coloring and perming also act primarily on the cortex, which is why its condition matters so much.

Question 27Cosmetology theory and practice (official domain list not published in source)

What does the term "growth pattern" describe when assessing a client's hair for a haircut?

  1. The rate at which the hair grows each month
  2. The amount of curl produced by a perm service
  3. The direction in which the hair grows from the scalp Correct answer.
  4. The diameter of each individual hair strand

Explanation

Growth pattern refers to the direction the hair leaves the scalp, such as a cowlick or a natural whorl. It influences where partings fall and how a cut will lie, so it must be considered during the client consultation.

Question 28Cosmetology theory and practice (official domain list not published in source)

A client has an oval face shape. Which styling goal is generally recommended for this face shape?

  1. Creating a strong horizontal fringe to shorten the face
  2. Adding heavy volume at the crown to lengthen the face
  3. Adding width at the jawline to balance the forehead
  4. Balancing the proportions while avoiding styles that hide the face's natural symmetry Correct answer.

Explanation

The oval face is considered balanced, so the usual aim is to preserve that proportion rather than correct it. Styles that keep hair off the face or add only gentle balance work well, while extreme volume or heavy fringe can distort the natural symmetry.

Question 29Cosmetology theory and practice (official domain list not published in source)

Which of the following is the primary purpose of a safety datasheet (SDS) in the salon?

  1. To list the retail price of each professional product
  2. To record each client's chemical service history
  3. To document the salon's daily sanitation schedule
  4. To provide handling, hazard, and first-aid information for a chemical product Correct answer.

Explanation

An SDS supplies standardized information about a product's hazards, safe handling, storage, and emergency first-aid measures. Salons are expected to keep these sheets accessible for every chemical product used on the premises.

Question 30Cosmetology theory and practice (official domain list not published in source)

Which of the following is the main function of the sebaceous glands?

  1. To produce melanin that protects against ultraviolet light
  2. To regulate body temperature through evaporation
  3. To produce sweat that cools the body
  4. To secrete sebum that lubricates the skin and hair Correct answer.

Explanation

Sebaceous glands are attached to hair follicles and secrete sebum, an oily substance that lubricates the skin and hair and helps retain moisture. Overactivity of these glands contributes to oily skin and scalp.

Question 31Cosmetology theory and practice (official domain list not published in source)

Which of the following describes the correct way to hold a shear for a haircut?

  1. With all four fingers through the finger grip for maximum control
  2. With the thumb in the thumb grip and the ring finger in the finger grip Correct answer.
  3. With the index finger resting on the pivot screw at all times
  4. With the thumb in the finger grip and the ring finger in the thumb grip

Explanation

The thumb goes into the smaller thumb grip and the ring finger into the larger finger grip, while the little finger rests on the finger rest. This grip allows smooth, controlled opening and closing of the blades.

Question 32Cosmetology theory and practice (official domain list not published in source)

What is the primary purpose of applying a base coat before nail polish?

  1. To help the polish adhere and protect the nail plate from staining Correct answer.
  2. To strengthen the nail plate permanently
  3. To speed up the drying time of the top coat
  4. To add color depth to the polish

Explanation

A base coat creates a smooth bonding layer that helps polish adhere evenly and shields the nail plate from pigments that can stain. It also helps prevent peeling and chipping of the color coat.

Question 33Cosmetology theory and practice (official domain list not published in source)

Which of the following best describes the purpose of a consultation before a chemical service?

  1. To determine the client's budget for the appointment
  2. To test whether the client likes the salon's retail products
  3. To schedule the client's next appointment before starting
  4. To assess hair and scalp condition and agree on a realistic service plan Correct answer.

Explanation

The consultation gathers information about the client's hair history, scalp condition, and goals so the cosmetologist can choose a safe, realistic service. It also sets expectations and documents the agreed plan.

Question 34Cosmetology theory and practice (official domain list not published in source)

A client requests a service, but the cosmetologist is not trained or licensed for that specific procedure. What is the appropriate action?

  1. Ask another client to describe how the service is done
  2. Perform only part of the service to reduce risk
  3. Perform the service carefully after watching a video
  4. Decline the service and refer the client to a qualified professional Correct answer.

Explanation

A cosmetologist should only perform services within the scope of their training and license. Declining and referring protects the client's safety and keeps the practitioner within legal and ethical boundaries.

Question 35Cosmetology theory and practice (official domain list not published in source)

Which of the following best explains why a higher-volume developer produces more lift in a lightening service?

  1. It deposits a lighter tone that masks the natural pigment
  2. It contains a higher concentration of hydrogen peroxide, which accelerates melanin oxidation Correct answer.
  3. It raises the hair's pH above 12 to open the cuticle permanently
  4. It contains more pigment that lightens the hair directly

Explanation

Developer is hydrogen peroxide, and higher volumes contain a greater concentration of it. More peroxide speeds the oxidation of melanin, producing more lift when paired with an alkaline lightener, though the risk of damage also rises.

Question 36Cosmetology theory and practice (official domain list not published in source)

A client with fine, limp hair wants more volume without a chemical service. Which styling approach best supports that goal?

  1. Applying a heavy styling cream from mid-length to ends
  2. Blow-drying with a round brush at the root using upward tension Correct answer.
  3. Using a flat iron on the root area to compress the cuticle
  4. Applying a serum to the scalp before styling

Explanation

Lifting the hair at the root with a round brush and directional airflow creates volume and sets the root away from the scalp. Fine hair holds this shape well when the root is dried under tension before finishing.

Question 37Cosmetology theory and practice (official domain list not published in source)

Which of the following best describes the role of the pH scale in a conditioning treatment?

  1. pH only affects the fragrance of the product
  2. A lower pH helps close the cuticle and smooth the hair surface Correct answer.
  3. pH has no effect on the cuticle during conditioning
  4. A higher pH tightens the cuticle and adds shine

Explanation

Acidic products lower pH, which encourages the cuticle scales to lie flat and improves smoothness and shine. Alkaline products tend to swell and open the cuticle instead.

Question 38Cosmetology theory and practice (official domain list not published in source)

A client's scalp shows small, red, inflamed bumps around the hairline after waxing. Which of the following is the most appropriate response?

  1. Apply a strong astringent and continue with a chemical service
  2. Discontinue the service, soothe the area, and advise the client to seek medical advice if it worsens Correct answer.
  3. Apply another layer of wax to the area to reduce irritation
  4. Cover the area with makeup and finish the service

Explanation

Inflamed bumps may indicate irritation or infection, and continuing a chemical or heat service could worsen the condition. The safe course is to stop, soothe the skin, and refer the client for medical evaluation if symptoms persist.

Question 39Cosmetology theory and practice (official domain list not published in source)

Which of the following best describes the difference between sterilization and disinfection?

  1. Sterilization kills all microorganisms, while disinfection destroys most pathogens on surfaces Correct answer.
  2. Disinfection kills all bacterial spores, while sterilization only reduces bacteria
  3. Disinfection and sterilization are interchangeable terms in the salon
  4. Sterilization is used only on the skin, while disinfection is used on tools

Explanation

Sterilization destroys all microbial life, including spores, while disinfection reduces most pathogenic organisms on nonporous surfaces. Salons typically use hospital-grade disinfectants for implements rather than sterilization equipment.

Question 40Cosmetology theory and practice (official domain list not published in source)

A client wants a dramatic color change from dark brown to light blonde in one appointment. Which of the following is the most professional response?

  1. Explain the realistic number of sessions needed and the potential for damage Correct answer.
  2. Promise the exact result in one session to satisfy the client
  3. Refuse to discuss the service and change the subject
  4. Apply the lightener at maximum strength to finish quickly

Explanation

Large color changes often require multiple sessions to protect the integrity of the hair. Explaining the process and the risk of damage helps the client make an informed decision and sets realistic expectations.

Question 41Cosmetology theory and practice (official domain list not published in source)

Which of the following best describes the function of the papilla in the hair follicle?

  1. It secretes sebum onto the scalp surface
  2. It produces the keratin that forms the hair shaft
  3. It anchors the hair to the dermis
  4. It supplies nutrients and oxygen to the growing hair through the bloodstream Correct answer.

Explanation

The papilla sits at the base of the follicle and contains capillaries that deliver nutrients and oxygen to the matrix cells. Without this blood supply, hair growth is impaired.

Question 42Cosmetology theory and practice (official domain list not published in source)

A client with very curly hair asks for a blowout with a smooth finish. Which technique best supports this result?

  1. Apply a heavy oil to the roots and air-dry the hair
  2. Comb the hair with a wide-tooth comb while it is still soaking wet
  3. Detangle dry hair with a fine-tooth comb and apply high heat directly
  4. Section the hair, apply a heat protectant, and dry each section under tension with a round brush Correct answer.

Explanation

Working in sections with a heat protectant and tension from a round brush smooths the cuticle and produces a lasting finish. Detangling first and controlling moisture prevent frizz and uneven results.

Question 43Cosmetology theory and practice (official domain list not published in source)

Which of the following best explains why a patch test is read after 24 to 48 hours rather than immediately?

  1. Immediate reading is sufficient and the waiting period is optional
  2. The product needs time to change color before reading
  3. Delayed allergic reactions may take time to develop and appear Correct answer.
  4. The skin must be exposed to sunlight before a reaction appears

Explanation

Allergic contact reactions are often delayed and may not appear for a day or two after exposure. Waiting 24 to 48 hours allows a true sensitivity to become visible before a full service is performed.

Question 44Cosmetology theory and practice (official domain list not published in source)

A client has a history of allergic reactions to hair color. What is the most appropriate action before performing a color service?

  1. Apply the color only to the ends without testing
  2. Perform a patch test and document the result before the service Correct answer.
  3. Use a stronger developer to speed up the process
  4. Proceed with a full application because the reaction was long ago

Explanation

A documented patch test identifies sensitivity before the full service and protects the client from a severe reaction. The result should be recorded in the client's file for future reference.

Question 45Cosmetology theory and practice (official domain list not published in source)

Which of the following best describes the relationship between the hair's porosity and its ability to absorb moisture?

  1. Porosity has no effect on moisture retention
  2. Low porosity hair absorbs moisture quickly and releases it slowly
  3. Porosity only affects the color of the hair
  4. High porosity hair absorbs moisture quickly but loses it quickly as well Correct answer.

Explanation

Highly porous hair has a raised or damaged cuticle that takes in moisture rapidly but cannot hold it, leading to dryness and frizz. Low porosity hair resists moisture because the cuticle is tightly closed.

Question 46Cosmetology theory and practice (official domain list not published in source)

A client's perm has been processed and rinsed. Which step is essential before the neutralizer is applied?

  1. Apply heat to the rods for ten minutes
  2. Comb the hair straight with a fine-tooth comb
  3. Apply shampoo and conditioner immediately
  4. Blot the hair thoroughly to remove excess water Correct answer.

Explanation

Excess water must be blotted from the rods so the neutralizer is not diluted and can reform the disulfide bonds effectively. The hair should remain on the rods during neutralization.

Question 47Cosmetology theory and practice (official domain list not published in source)

Which of the following best explains why hard water can affect shampoo results in the salon?

  1. It contains dissolved minerals that can leave deposits and reduce lather Correct answer.
  2. It has a pH below 4, which damages the cuticle
  3. It contains too much chlorine, which bleaches the hair
  4. It contains oils that condition the hair too heavily

Explanation

Hard water carries calcium and magnesium ions that can bind to the hair, dulling it and interfering with shampoo lather. Clarifying or chelating shampoos help remove these mineral deposits.

Question 48Cosmetology theory and practice (official domain list not published in source)

A client with a sensitive scalp reports stinging during a color service. Which of the following is the most appropriate immediate action?

  1. Add more developer to dilute the product on the scalp
  2. Continue the service and reassure the client that stinging is normal
  3. Apply a heating cap to speed up processing
  4. Stop the service, remove the product, and assess the scalp Correct answer.

Explanation

Stinging can signal irritation or an allergic reaction, and continuing exposes the client to further harm. The product should be removed promptly and the scalp assessed before any decision to proceed.

Question 49Cosmetology theory and practice (official domain list not published in source)

A cosmetologist is choosing between a semi-permanent and a permanent color for a client with 50 percent gray hair who wants full coverage. Which choice is best and why?

  1. Permanent color, because it penetrates the cortex and provides lasting gray coverage Correct answer.
  2. A lightener alone, because it removes the gray pigment
  3. Temporary color, because it coats the surface and washes out evenly
  4. Semi-permanent color, because it deposits color without lifting

Explanation

Permanent color uses an oxidation reaction that deposits pigment within the cortex, giving durable coverage of resistant gray hair. Semi-permanent and temporary colors sit closer to the surface and fade more quickly.

Question 50Cosmetology theory and practice (official domain list not published in source)

Which of the following best explains why a relaxer service should not be performed on hair that has been lightened to a very pale level?

  1. The lightened hair has a weakened protein structure and is prone to breakage under strong alkali Correct answer.
  2. The relaxer will permanently darken the hair color
  3. The relaxer will only affect the new growth and not the lightened ends
  4. Lightened hair repels all chemical products and will not process

Explanation

Lightening breaks disulfide bonds and degrades the protein structure, leaving hair fragile. Applying a strong alkaline relaxer to such hair greatly increases the risk of breakage and should be avoided or approached with extreme caution.