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DC Barber - independent service foundations study materials
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DC Barber - independent service foundations practice questions

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Question 1Hair fibre, growth and material behavior

What are the three layers of the hair shaft from outermost to innermost?

  1. Cortex, medulla, cuticle
  2. Cuticle, cortex, medulla Correct answer.
  3. Medulla, cuticle, cortex
  4. Epidermis, dermis, hypodermis

Explanation

The three layers of the hair shaft, from outermost to innermost, are: the cuticle (protective outer layer of overlapping scales), the cortex (middle layer containing melanin and keratin), and the medulla (innermost core, sometimes absent in fine hair).

Question 2Hair fibre, growth and material behavior

What is the primary protein that makes up human hair?

  1. Collagen
  2. Elastin
  3. Keratin Correct answer.
  4. Melanin

Explanation

Keratin is the primary structural protein of hair, comprising approximately 90% of the hair's composition. It is a strong, fibrous protein composed of amino acid chains linked by various types of bonds.

Question 3Hair fibre, growth and material behavior

What is the active growth phase of the hair cycle called?

  1. Catagen
  2. Telogen
  3. Anagen Correct answer.
  4. Exogen

Explanation

The anagen phase is the active growth phase of the hair cycle, lasting 2-6 years for scalp hair. During this phase, the hair follicle actively produces new cells. Approximately 85-90% of scalp hairs are in anagen at any time.

Question 4Hair fibre, growth and material behavior

What determines the natural color of hair?

  1. The cuticle layer thickness
  2. The type and amount of melanin in the cortex Correct answer.
  3. The size of the medulla
  4. The blood supply to the follicle

Explanation

Hair color is determined by the type and amount of melanin in the cortex. Eumelanin produces brown to black colors, while pheomelanin produces red to yellow colors. The ratio and concentration create the spectrum of natural hair colors.

Question 5Hair fibre, growth and material behavior

Which type of chemical bond in hair is temporarily broken by water and heat?

  1. Disulfide bonds
  2. Peptide bonds
  3. Hydrogen bonds Correct answer.
  4. Covalent bonds

Explanation

Hydrogen bonds are weak physical side bonds temporarily broken by water and heat. This allows wet hair to be restyled and hold its shape when dried. Disulfide bonds require chemical treatment to break.

Question 6Hair fibre, growth and material behavior

What is the function of the arrector pili muscle?

  1. It moves the jaw during chewing
  2. It causes hair to stand upright and creates goosebumps when contracted Correct answer.
  3. It controls blood flow to the scalp
  4. It produces sebum

Explanation

The arrector pili is a tiny involuntary muscle attached to each hair follicle. When it contracts (due to cold, fear, or emotions), it causes the hair to stand upright and the surrounding skin to form goosebumps.

Question 7Hair fibre, growth and material behavior

What is the cortex layer of the hair responsible for?

  1. Protecting the hair from damage
  2. Providing hair with its strength, elasticity, and color (contains melanin and keratin) Correct answer.
  3. Producing new hair growth
  4. Lubricating the hair shaft

Explanation

The cortex is the middle layer of the hair shaft, making up the majority of the hair's bulk. It contains melanin (responsible for color), keratin protein chains linked by bonds (responsible for strength and elasticity), and determines the hair's texture.

Question 8Hair fibre, growth and material behavior

What effect does an alkaline (high pH) product have on the hair cuticle?

  1. It closes and smooths the cuticle
  2. It swells and opens the cuticle, allowing chemical penetration Correct answer.
  3. It has no effect
  4. It permanently removes the cuticle

Explanation

Alkaline products (pH above 7) cause the hair cuticle to swell and open, allowing chemical solutions to penetrate into the cortex. This is how relaxers, perms, and permanent color work. Acidic products close the cuticle.

Question 9Hair fibre, growth and material behavior

Which layer of skin contains hair follicles, blood vessels, and nerve endings?

  1. Epidermis
  2. Dermis Correct answer.
  3. Subcutaneous tissue
  4. Stratum corneum

Explanation

The dermis is the second layer of skin beneath the epidermis. It contains hair follicles, blood vessels, nerve endings, sebaceous glands, and sweat glands. It provides structural support and nourishment.

Question 10Hair fibre, growth and material behavior

What determines whether hair is straight, wavy, or curly?

  1. The length of the hair
  2. The shape of the hair follicle Correct answer.
  3. The products used on the hair
  4. The climate

Explanation

The shape of the hair follicle determines the curl pattern: round follicles produce straight hair, oval follicles produce wavy hair, and flat or ribbon-shaped follicles produce curly to coily hair. This is genetically determined.

Question 11Hair fibre, growth and material behavior

What is hair porosity and how does it affect chemical services?

  1. The color of the hair
  2. The ability of hair to absorb and retain moisture, which determines how quickly chemicals penetrate and process Correct answer.
  3. The rate of growth
  4. The thickness of individual strands

Explanation

Porosity refers to the hair's ability to absorb and retain moisture, determined by the cuticle condition. High porosity hair (damaged cuticle) absorbs chemicals quickly and may overprocess; low porosity hair (tight cuticle) resists absorption and may need longer processing.

Question 12Hair fibre, growth and material behavior

What is the function of the sebaceous glands?

  1. They produce sweat
  2. They produce sebum (natural oil) that lubricates the hair and skin Correct answer.
  3. They produce melanin
  4. They produce keratin

Explanation

Sebaceous glands are oil-producing glands attached to hair follicles that secrete sebum. Sebum is a natural oil that lubricates and waterproofs the hair shaft and skin. Overproduction causes oily scalp; underproduction causes dryness.

Question 13Hair fibre, growth and material behavior

What is the function of the subcutaneous layer (hypodermis) of the skin?

  1. It produces melanin
  2. It is the deepest layer providing insulation, cushioning, and energy storage through adipose (fat) tissue Correct answer.
  3. It protects against UV radiation
  4. It produces hair keratin

Explanation

The subcutaneous layer (hypodermis) is the deepest layer of the skin, composed primarily of adipose (fat) tissue. It provides thermal insulation, cushions underlying muscles and bones against impact, and serves as an energy storage reservoir.

Question 14Haircut planning, geometry, sectioning and cross-checking

What technique involves gradually blending hair from very short to longer?

  1. Layering
  2. Tapering or fading Correct answer.
  3. Blunt cutting
  4. Texturizing

Explanation

Tapering or fading is the technique of gradually blending hair from very short (or skin) at the hairline to progressively longer lengths higher on the head. Types include low, mid, and high fades.

Question 15Haircut planning, geometry, sectioning and cross-checking

What is the guideline section of hair used as a length reference during a haircut?

  1. The parting
  2. The traveling guide or stationary guide Correct answer.
  3. The crown point
  4. The outline

Explanation

A guide (traveling or stationary) is the first section of hair cut to establish the desired length. All subsequent sections are compared to this guide to ensure consistency. A stationary guide stays in one place; a traveling guide moves with each new section.

Question 16Haircut planning, geometry, sectioning and cross-checking

What is the term for the technique of cutting into the ends of the hair with shear tips to create texture?

  1. Blunt cutting
  2. Point cutting Correct answer.
  3. Club cutting
  4. Razor rotation

Explanation

Point cutting involves cutting into the ends of the hair with the tips of the shears held at an angle. This technique creates texture, movement, and softens blunt or heavy lines at the ends.

Question 17Haircut planning, geometry, sectioning and cross-checking

What is the proper technique for cross-checking a haircut?

  1. Checking the receipt
  2. Combing the hair in the opposite direction from how it was cut to verify consistency and accuracy Correct answer.
  3. Asking the client to check in a mirror
  4. Comparing the cut to a photo

Explanation

Cross-checking involves combing the hair in the opposite direction from how it was originally sectioned and cut. For example, if sections were cut vertically, cross-check by combing horizontally. This verifies consistent length throughout.

Question 18Haircut planning, geometry, sectioning and cross-checking

What is the proper technique for performing a skin fade at the temples?

  1. Use scissors only at the temples
  2. Use the corner of the trimmer to create a clean transition from skin to the shortest clipper guard, blending upward with progressively longer guards Correct answer.
  3. Shave the temple area completely bald
  4. Use a razor to cut the temple hair

Explanation

A skin fade at the temples requires using the corner of the trimmer or zero-gap clipper to create a smooth transition from bare skin to the shortest clipper guard length. The barber then progressively uses longer guards moving upward, blending each transition zone for a seamless gradient.

Question 19Haircut planning, geometry, sectioning and cross-checking

What is the proper technique for using a lever on adjustable clippers during a fade?

  1. Keep the lever in one position throughout
  2. Gradually open the lever as you move upward from the hairline to increase cutting length, creating a seamless blend between guard sizes Correct answer.
  3. Close the lever for longer cuts
  4. The lever only affects clipper speed

Explanation

The clipper lever controls the blade gap and cutting length. During a fade, the barber starts with the lever closed (shortest cut) at the hairline and gradually opens it moving upward to increase the cutting length. This creates seamless micro-transitions between guard sizes for a smooth fade.

Question 20Haircut planning, geometry, sectioning and cross-checking

What is the significance of the apex of the head in haircutting?

  1. It has no significance
  2. The apex is the highest point of the head and serves as a key reference point for establishing overall length, proportions, and the starting point for many cutting techniques Correct answer.
  3. It only matters for women's haircuts
  4. The apex is at the back of the head

Explanation

The apex is the highest point of the head when viewed in profile. It serves as a critical reference point for establishing overall proportions, determining where the top section begins, and as a starting point for many layering techniques. Hair at the apex often serves as the initial guide for cuts.

Question 21Haircut planning, geometry, sectioning and cross-checking

What haircutting technique creates a smooth transition from short to long hair?

  1. Blunt cutting
  2. Tapering or fading Correct answer.
  3. Texturizing
  4. Razor cutting

Explanation

Tapering or fading is the technique used to create a smooth, gradual transition from shorter hair at the neckline and sides to longer hair on top. Different types include low fade, mid fade, high fade, and taper fade. This is one of the most fundamental and commonly requested barbering techniques.

Question 22Haircut planning, geometry, sectioning and cross-checking

What does the term 'over-direction' mean in haircutting?

  1. Cutting too much hair off
  2. Combing or pulling the hair past its natural fall position before cutting Correct answer.
  3. Using too much product on the hair
  4. Cutting in the wrong direction

Explanation

Over-direction in haircutting means combing or pulling the hair beyond its natural fall position before cutting. This technique is used to create specific effects, such as building weight or length in certain areas of the haircut. It is a key principle for creating graduated and layered shapes.

Question 23Haircut planning, geometry, sectioning and cross-checking

What is a guideline (guide) in haircutting?

  1. A written set of rules from the board
  2. A section of hair cut to a specific length that serves as the reference for the rest of the cut Correct answer.
  3. A type of haircutting tool
  4. The client's instructions

Explanation

A guideline (also called a guide or traveling guide) is a section of hair that is cut to a specific length and serves as a reference point for cutting the remaining hair. It establishes the length and shape of the haircut. Subsequent sections are compared to the guide to maintain consistency throughout the cut.

Question 24Haircut planning, geometry, sectioning and cross-checking

What is the difference between wet cutting and dry cutting hair?

  1. Wet cutting is for curly hair only; dry cutting is for straight hair only
  2. Wet cutting provides precision on controlled hair; dry cutting reveals the natural texture and final result Correct answer.
  3. There is no difference
  4. Dry cutting is always preferred over wet cutting

Explanation

Wet cutting provides precision because water weighs down the hair and makes sections easier to control, resulting in clean, accurate lines. Dry cutting reveals the hair's natural texture, movement, and fall, allowing the barber to see exactly how the finished cut will look. Many barbers use a combination of both techniques.

Question 25Haircut planning, geometry, sectioning and cross-checking

What head shape consideration is important when designing a haircut?

  1. Head shape does not affect the haircut design
  2. The haircut should complement the client's head shape by adding or reducing volume in specific areas Correct answer.
  3. All clients should receive the same basic shape regardless of head shape
  4. Head shape only matters for women's haircuts

Explanation

A skilled barber considers the client's head shape when designing a haircut. The goal is to create the illusion of an oval or balanced head shape by adding volume where the head is flat and reducing volume where it protrudes. This is one of the key factors in creating a flattering, customized haircut.

Question 26Haircut planning, geometry, sectioning and cross-checking

What is the purpose of thinning shears in barbering?

  1. To cut hair as short as possible
  2. To reduce bulk and thickness while blending layers without shortening the overall length Correct answer.
  3. To create blunt, uniform lines
  4. To cut beard hair only

Explanation

Thinning shears (also called blending or texturizing shears) have one or both blades with teeth/notches. They are used to reduce bulk and thickness, blend layers, and add texture to a haircut without significantly shortening the overall length. They remove some hairs while leaving others, creating a softer, blended result.

Question 27Haircut planning, geometry, sectioning and cross-checking

What is the proper way to hold a comb during a clipper-over-comb technique?

  1. Hold the comb flat against the head
  2. Hold the comb at an angle, lifting hair away from the head while moving the clipper over the comb's teeth Correct answer.
  3. Hold the comb behind the clippers
  4. Hold the comb in the non-dominant hand without any specific positioning

Explanation

During clipper-over-comb technique, the comb is held at an angle to lift the hair away from the head. The angle of the comb determines the length of hair that will be cut by the clippers as they pass over the teeth. A steeper angle removes more hair, while a gentler angle leaves more length. The barber adjusts the angle progressively for smooth blending.

Question 28Facial-hair design, shaving preparation and service boundaries

What is pseudofolliculitis barbae?

  1. A fungal scalp infection
  2. Razor bumps caused by ingrown hairs, commonly occurring in people with curly or coarse hair Correct answer.
  3. A type of dandruff
  4. A chemical burn reaction

Explanation

Pseudofolliculitis barbae (razor bumps) occurs when shaved hairs curl back into the skin, causing inflammation and bumps. It is most common in individuals with curly or coarse hair. Prevention includes shaving with the grain and using proper techniques.

Question 29Facial-hair design, shaving preparation and service boundaries

What is the purpose of a pre-shave oil in a barbershop shave service?

  1. To add color to the beard
  2. To create a protective layer between the skin and razor, reducing friction, irritation, and the risk of nicks while softening the beard hair Correct answer.
  3. To clean the skin before shaving
  4. To speed up the shaving process

Explanation

Pre-shave oil is applied before lather to create a protective, lubricating layer between the razor and skin. It reduces friction, minimizes irritation, decreases the risk of nicks and razor burn, and helps soften the beard hair. It is particularly beneficial for clients with sensitive skin.

Question 30Facial-hair design, shaving preparation and service boundaries

What causes razor bumps (pseudofolliculitis barbae)?

  1. An allergic reaction to metal razors
  2. Ingrown hairs that curl back into the skin after shaving, causing inflammation Correct answer.
  3. A bacterial infection from dull razors
  4. Excessive use of aftershave

Explanation

Razor bumps (pseudofolliculitis barbae) are caused by shaved hairs that curl back and grow into the surrounding skin, creating an inflammatory response. This condition is particularly common in individuals with curly or coarse hair. Prevention includes shaving with the grain, using sharp blades, and proper skin preparation.

Question 31Cleansing, conditioning, drying and temporary styling

What is the proper blow-drying technique for creating a smooth, straight style?

  1. Direct the nozzle against the hair growth direction
  2. Direct the airflow down the hair shaft from roots to ends, following with a brush to smooth the cuticle Correct answer.
  3. Hold the dryer in one spot until dry
  4. Use only cold air

Explanation

For a smooth, straight style, direct the concentrator nozzle down the hair shaft from roots to ends, which smooths the cuticle scales. Follow each section with a paddle brush or round brush. Keep the dryer moving to distribute heat evenly.

Question 32Cleansing, conditioning, drying and temporary styling

What is the proper way to test a hot towel temperature before applying it to a client?

  1. Apply it directly and ask the client if it's okay
  2. Test on the inside of your wrist - it should be warm but not scalding Correct answer.
  3. Use only cold towels to avoid burns
  4. Estimate the temperature by sight

Explanation

Before applying a hot towel to a client's face, the barber should test the temperature on the inside of their wrist, which is highly sensitive to heat. The towel should feel warm and comfortable but not hot enough to burn. This prevents scalding injuries and ensures a pleasant experience for the client.

Question 33Cleansing, conditioning, drying and temporary styling

In classic styling disciplines, what is 'vandondulation' (water waving / finger waves), and how are the waves formed?

  1. Setting wet hair on smooth rollers and clips without shaping alternating ridges by hand.
  2. Sculpting wet hair into alternating S-shaped curves and ridges (kamme) using a comb and fingers, without a heated waving tool. Correct answer.
  3. Creating waves on dry hair with a thermal iron and then brushing them into an S pattern.
  4. Winding damp hair on permanent-wave rods before applying reducing lotion.

Explanation

Vandondulation (finger waving) uses the fingers and comb to shape damp hair into alternating curved ridges and troughs (kamme og dale). Product may support control and hold, but the defining technique is the wet manual shaping rather than a thermal iron or chemical waving lotion.

Question 34Cleansing, conditioning, drying and temporary styling

When styling a classic men's 'bombage' or structured pomp, what tool and technique are used to build maximum smooth volume in the front forelock?

  1. A brush or styling comb that lifts and directs the roots while controlled airflow shapes the front, followed by cooling before release. Correct answer.
  2. A narrow nozzle aimed against the finished surface from tip to root after the hair is fully dry.
  3. A flat brush that holds the forelock tightly against the forehead throughout drying.
  4. A curling iron used as the only shaping tool before the blow-dry is assessed.

Explanation

Bombage requires lifting and directing the front hair at the root with a brush or comb while controlled airflow shapes and dries the section. Cooling the dry section before release helps it retain the rounded, voluminous form.

Question 35Cleansing, conditioning, drying and temporary styling

Why is the direction of airflow from the blow-dryer nozzle (føntørrerens mundstykke) kept pointing from root to tip along the hair shaft?

  1. To lift the overlapping cuticle edges and create more texture at the surface.
  2. To direct the overlapping cuticle edges smoothly toward the ends, improving alignment, shine, and frizz control. Correct answer.
  3. To make the roots dry more slowly than the ends so the style remains flexible.
  4. To replace brush tension as the main method of shaping the hair.

Explanation

Cuticle cells overlap toward the ends. Directing controlled airflow in that same direction helps keep the surface aligned instead of roughening it, while brush control and suitable heat shape and dry the section.

Question 36Cleansing, conditioning, drying and temporary styling

What temporary chemical bonds inside the hair shaft are reformed when hair is dried from wet to dry with a blow-dryer and round brush?

  1. Covalent disulfide bonds (svovlbroer)
  2. Hydrogen bonds (brintbindinger) Correct answer.
  3. Salt bonds that require an alkaline chemical service to change
  4. Peptide bonds forming the keratin backbone

Explanation

Hydrogen bonds are weak, temporary cross-links easily broken by water and rebuilt as the hair dries. Blow-drying molds these bonds into a new shape (curl, wave, or smooth), which holds until the hair re-absorbs atmospheric moisture or is washed.

Question 37Cleansing, conditioning, drying and temporary styling

In structured long-hair dressing (langthårsopsætning), what is the function of backcombing / teasing (toupering)?

  1. To smooth every strand flat so pins have less texture to grip.
  2. To compact hair toward the scalp, creating an internal cushion and foundation (fundament) to anchor bobby pins and support structural volume. Correct answer.
  3. To replace the structural support of pins in every long-hair design.
  4. To create surface shine without changing volume or internal support.

Explanation

Toupering (backcombing) slides shorter interior strands down toward the scalp, forming a supportive, dense fibrous mesh. This cushion creates lasting structural volume and provides a secure base (fundament) into which bobby pins (hårnåle) can grip without slipping.

Question 38Cleansing, conditioning, drying and temporary styling

Why is a secure internal foundation important in a structured long-hair design (langthårsfrisering)?

  1. It lets the candidate use visible fasteners as the main decorative feature regardless of the task.
  2. It anchors the design's weight and movement so the finished shape remains balanced, durable, and cleanly presented. Correct answer.
  3. It removes the need to consider the model's head shape or hair quality.
  4. It guarantees stability even when sections are pinned against their intended direction of movement.

Explanation

A long-hair design needs an internal structure that supports its mass and planned movement without distracting visible gaps or loose work. Pins and backcombing should be placed to resist the direction of movement and support the chosen shape while remaining tidy and suitable for the model.

Question 39Cleansing, conditioning, drying and temporary styling

In men's styling, what is the primary aesthetic difference between a matte clay/paste and an oil-based classic pomade?

  1. Matte clay provides high shine and wet look, while pomade provides a dry powdery finish.
  2. Matte clay absorbs light to deliver a dry, natural, textured finish with pliable hold, whereas oil-based pomade delivers high slick shine, crisp comb lines, and a wet look. Correct answer.
  3. Matte clay gives flexible separation, while classic pomade can give controlled comb definition; both always have the same shine.
  4. They differ mainly in wash-out method, while both are intended to produce the same glossy, combed finish.

Explanation

A matte clay or paste is selected for low shine, separation, and a drier textured appearance. A classic oil-based pomade is selected for gloss, smooth control, and visible comb definition; the exact hold and ingredients still vary by product.

Question 40Cleansing, conditioning, drying and temporary styling

How should a candidate choose thermal-tool temperature for fine, chemically lightened hair?

  1. Use the maximum setting so the tool contacts each section for less time.
  2. Assess condition, use the lowest effective temperature within the tool and product instructions, protect the hair, and test a section before proceeding. Correct answer.
  3. Use one fixed temperature for every head because chemical history does not affect heat tolerance.
  4. Choose temperature from the desired curl diameter rather than from hair condition.

Explanation

Lightening can leave hair more porous and vulnerable to heat. There is no single safe temperature for every tool and head of hair, so diagnosis, manufacturer limits, heat protection, short controlled contact, and a test section are more defensible than an unsupported universal threshold.

Question 41Cleansing, conditioning, drying and temporary styling

Why should the focal point and mass of a long-hair design not be placed by one fixed measurement for every model?

  1. Because assessors grade only the number of pins, not the finished shape.
  2. Because placement must create form and harmony suited to the model's face, head shape, hair quality, and the selected design. Correct answer.
  3. Because every model must receive an asymmetrical design with mass on the same side.
  4. Because the highest possible placement is always the most flattering and durable.

Explanation

The SUS styling rubrics repeatedly assess whether form, movement, and harmony suit the model's face, client type, and hair quality. Those variables require design judgment; they cannot be reduced to one universal facial landmark or fixed centimetre measurement.

Question 42Cleansing, conditioning, drying and temporary styling

What is the primary difference in winding technique between a spiral wrap (spiralvikling) and a croquignole wrap (klassisk vikling)?

  1. A spiral wrap winds hair along the length of a vertically held rod from root to tip or tip to root without overlapping, whereas croquignole winds hair from ends to scalp overlapping in layers onto a horizontally held rod. Correct answer.
  2. A spiral wrap overlaps each turn from ends to scalp, while croquignole places the strand along the rod without overlap.
  3. Both wraps wind from ends to scalp with identical overlap; only the parting shape differs.
  4. Spiral describes rod size, while croquignole describes lotion strength.

Explanation

Croquignole winding rolls hair from the ends inward toward the scalp with each turn overlapping the previous layer on a horizontal rod, creating tighter ends and looser roots. A spiral wrap winds the hair along the vertical length of the rod like a corkscrew, producing uniform curl diameter from root to tip.

Question 43Cleansing, conditioning, drying and temporary styling

Which aftercare advice is most defensible after a permanent wave service?

  1. Promise that every product requires exactly 48 hours without washing because neutralization does not reform bonds in the salon.
  2. Follow the perm manufacturer's aftercare interval, handle the hair gently, and use suitable cleansing and conditioning products without inventing a universal waiting period. Correct answer.
  3. Recommend immediate repeated shampooing to remove the newly formed curl pattern.
  4. Advise that aftercare cannot affect condition or curl retention once the rods are removed.

Explanation

The neutralizer is intended to reform disulfide bonds during the service. Product manufacturers may give different shampooing and aftercare intervals, so the professional should communicate the actual instructions and emphasize gentle care rather than claim that every perm has an identical 48-hour chemical process.

Question 44Cleansing, conditioning, drying and temporary styling

When styling with a round brush (formtørring med rundbørste), what is the function of the 'cool shot' button (koldluftknap) on the blow-dryer?

  1. To add more moisture so the section can be reshaped without rewetting.
  2. To cool a fully dried, shaped section before release so it retains the molded curl or bend more effectively. Correct answer.
  3. To cool the tool motor while leaving the heated section unchanged.
  4. To replace complete drying by making a damp section feel cool.

Explanation

After the section has been shaped and dried with controlled heat and brush tension, cool air lowers its temperature while it remains supported. Releasing it only after cooling helps preserve the temporary set; cool air does not replace complete drying.

Question 45Cleansing, conditioning, drying and temporary styling

In creative long-hair braiding and chignon work, why is applying a light texturizing powder or dry texture spray beneficial prior to pinning?

  1. It makes each section smoother and more slippery so pins can be repositioned repeatedly.
  2. It adds grip (friktion) and matte traction to slippery, silky hair, preventing braids and pins from unraveling. Correct answer.
  3. It replaces sectioning and a secure foundation when the hair is fine.
  4. It increases grip, but only if so much is applied that the finish becomes visibly powdery.

Explanation

A suitable light texturizing product can increase surface grip in silky hair, making sections and pins easier to control. It supports clean construction but does not replace sectioning, a sound internal foundation, or the product directions.

Question 46Colour, lightening and chemical-texture principles

What is the purpose of a strand test before a chemical service?

  1. To test the client's pain tolerance
  2. To evaluate how the hair responds to the chemical, determining timing and expected results Correct answer.
  3. To measure hair length
  4. To test the smell of the product

Explanation

A strand test is performed on a small section of hair to evaluate how it responds to a chemical product. It helps determine correct processing time, expected results, and whether the hair can withstand the treatment.

Question 47Colour, lightening and chemical-texture principles

What chemical process permanently alters the disulfide bonds to straighten curly hair?

  1. Conditioning treatment
  2. Chemical relaxing Correct answer.
  3. Temporary rinse
  4. Hot oil treatment

Explanation

Chemical relaxing permanently straightens hair by breaking disulfide bonds with a strong alkaline solution (sodium hydroxide or calcium hydroxide), then reforming them in a straighter configuration. This is a permanent change that grows out with new growth.

Question 48Colour, lightening and chemical-texture principles

On a standard hairdresser color wheel (farvestjernen), which primary color is complementary to orange and is therefore used conceptually to neutralize an unwanted orange cast?

  1. Yellow (gul)
  2. Red (rød)
  3. Blue (blå) Correct answer.
  4. Green (grøn)

Explanation

Blue lies opposite orange on the color wheel, so blue and blue-based tones are used to counter an unwanted orange cast. The exact shade code and amount must still be chosen from the product manufacturer's system after diagnosing the hair.

Question 49Colour, lightening and chemical-texture principles

After confirming a manufacturer's shade chart, what does the number before the slash or dot in a code such as 7/34 commonly identify?

  1. The concentration of developer in volume.
  2. The natural tone depth (tonedybde), indicating how light or dark the base shade is on a scale from 1 to 10. Correct answer.
  3. The secondary reflex tone that neutralizes orange.
  4. The recommended processing time in minutes.

Explanation

Professional shade systems commonly use the leading number for depth and later characters for tonal nuances. The precise depth names and nuance numbers are manufacturer-specific, so a candidate should verify the chart for the product being used rather than assume every brand uses identical codes.

Question 50Colour, lightening and chemical-texture principles

What is hydrogen peroxide's central chemical role when it is used as the developer in permanent oxidative hair color?

  1. It supplies the alkalinity that opens the cuticle but does not participate in oxidation.
  2. It acts as the oxidizing agent that can lighten natural melanin and develop oxidative dye precursors into colored molecules. Correct answer.
  3. It functions only as a diluent that reduces the concentration of the color cream.
  4. It neutralizes all dye precursors before they can form color.

Explanation

The European Commission describes hydrogen peroxide as the oxidizing agent in permanent hair-color development. In the product's alkaline system it oxidizes natural melanin and enables developer and coupler molecules to form the intended color; the alkalizing agent, not peroxide alone, is chiefly responsible for swelling the cuticle.