Virginia Cosmetology License Exam — All Questions

On the pH scale, a product with a pH of 9 is:

• a.Neutral, the same as pure water
• b.Acidic
• c.Alkaline✓
• d.So acidic that it will dissolve hair

The pH scale runs from 0 to 14; 7 is neutral (pure water). Values below 7 are acidic, and values above 7 are alkaline (basic). A pH of 9 is alkaline. Alkaline products soften and swell the hair and raise the cuticle, which is why permanent color, lighteners, and alkaline (cold) waves are alkaline — they need the cuticle open to work. Acidic products (like many conditioners and toners) contract and smooth the cuticle. The scale is logarithmic, so each whole number is a tenfold change.

In permanent (oxidative) haircolor, what is the primary role of hydrogen peroxide (the developer)?

• a.It releases oxygen to develop the dye and lift pigment✓
• b.It seals the color molecules inside the cortex
• c.It acidifies the mixture to close the cuticle
• d.It swells the cuticle so the dye can enter

Permanent haircolor is an oxidation process. Hydrogen peroxide acts as the oxidizing agent (developer): it releases oxygen that both lightens (lifts) the hair's natural melanin and triggers the small color precursor molecules to combine into larger colored molecules trapped inside the cortex. Higher developer volumes (for example 20 vs. 10 volume) provide more oxygen and more lift. The alkaline ammonia in the color swells the cuticle so the developer and dyes can enter.

Which statement correctly contrasts a thioglycolate (acid/true-acid or cold-wave 'thio') perm with a hydroxide chemical hair relaxer?

• a.Both use exactly the same chemistry and are interchangeable on any hair
• b.Thio perms are permanent while hydroxide relaxers wash out in one shampoo
• c.Hydroxide relaxers can be neutralized back with thioglycolate and reused as a perm
• d.Thio perms are neutralized by re-oxidation; hydroxide relaxers are not✓

Ammonium thioglycolate (thio) waving breaks the hair's disulfide bonds by reduction; the hair is molded, then an oxidizing neutralizer rebuilds the bonds in the new shape. Hydroxide relaxers (sodium, potassium, lithium, or 'no-lye' guanidine hydroxide) straighten by a different, non-reversible chemical reaction (lanthionization) that permanently breaks disulfide bonds; they are stopped by thorough rinsing plus an acid-balanced neutralizing shampoo, not by an oxidizing neutralizer. Critically, thio and hydroxide chemistries are not compatible on the same hair and must never be layered without careful transition.

Before applying an oxidative (aniline-derivative) permanent haircolor, a predisposition test is performed to check for allergy. This test is known as the:

• a.Strand test
• b.Patch test✓
• c.Porosity test
• d.Elasticity test

A patch (predisposition) test is applied to the skin (behind the ear or inside the elbow) 24 to 48 hours before an aniline-derivative color service to detect an allergic reaction; a red, itchy, or swollen response is a positive reaction, and the service should not be performed. Do not confuse it with a strand test, which is done on a section of hair to preview the actual color result, timing, and the hair's condition — not to check for allergy.

In the haircolor level system, 'level' refers to:

• a.The amount of warmth or coolness a shade reflects, such as ash, gold, or copper
• b.The degree of lightness or darkness of a shade, from level 1 to level 10✓
• c.The strength or saturation of a tone, described as mild, medium, or strong
• d.The number of shampoos a shade is expected to last before it fades out

Level is the unit that measures how light or dark a color is. Most manufacturers use a 1 to 10 scale in which level 1 is black and level 10 is the lightest blonde, so a level 6 is lighter than a level 4. Tone (or hue) describes the warmth or coolness of the shade, and intensity describes the strength of that tone. How long a color lasts depends on its category, not on its level.

A colorist writes a formula as 'level 8, gold tone, medium intensity.' In that formula, intensity describes:

• a.how light or dark the finished shade will sit on the level scale
• b.how many shampoos the finished shade will survive before fading
• c.how much developer must be added to the tube before application
• d.how strong or concentrated the gold tone appears in the result✓

Level, tone, and intensity are three separate ideas. Level measures lightness or darkness, tone (hue) names the color family such as gold, ash, or copper, and intensity measures the strength or saturation of that tone, so a strong gold looks far more vivid than a mild gold at the same level. Developer volume and fade time are separate formulation decisions and are not what intensity means.

In the law of color, the three primary colors are:

• a.red, yellow, and blue✓
• b.red, green, and blue
• c.orange, green, and violet
• d.red, yellow, and orange

Primary colors are pure pigments that cannot be created by mixing other colors: red, yellow, and blue. Mixing two primaries in equal parts creates a secondary color (orange, green, or violet), and mixing a primary with a neighboring secondary creates a tertiary. Red, green, and blue is the additive system used for light and screens rather than pigment, and the other two groupings each contain a secondary color.

Mixing equal parts of blue and yellow pigment produces which color?

• a.Green, which is the complement of red✓
• b.Violet, which is the complement of yellow
• c.Orange, which is the complement of blue
• d.Brown, which is what all three primaries make

Blue and yellow are two primaries, and combined in equal parts they create the secondary color green. Violet is made from blue and red, and orange is made from red and yellow. Brown is the result when all three primaries are combined, which is why over-mixing complementary tones dulls a formula toward mud.

Hair lightened to a medium blonde has pulled a strong orange cast. Which tonal base should the colorist choose to neutralize it?

• a.A green base, because green sits opposite red on the color wheel
• b.A violet base, because violet sits opposite yellow on the wheel
• c.A blue base, because blue sits opposite orange on the color wheel✓
• d.A gold base, because warm pigment covers unwanted warmth best

Complementary colors sit opposite each other on the color wheel and neutralize each other when combined. Orange is neutralized by blue, so an ash (blue-based) toner or color cancels a brassy orange cast. Green is used against red and violet against yellow, and adding gold would intensify exactly the warmth the client wants removed.

A blonde client uses a violet-pigmented shampoo at home. What is that pigment doing to her hair?

• a.Depositing violet pigment to darken the hair by one full level
• b.Neutralizing yellow tones, because violet is the complement of yellow✓
• c.Lifting yellow pigment out of the cortex with a mild oxidizing agent
• d.Sealing the cuticle so that no further oxidation can take place

Violet and yellow are complementary, so a trace of violet pigment cancels the yellow that pale blonde hair shows. The shampoo only deposits; it cannot lift, because removing pigment requires an oxidizing product. Overuse can leave a visible violet cast on porous hair, but the shampoo does not change the hair's level and does not seal the cuticle against oxidation.

Two colors that sit directly opposite each other on the color wheel and cancel each other when combined are called:

• a.primary colors on the pigment wheel
• b.secondary colors on the pigment wheel
• c.tertiary colors on the pigment wheel
• d.complementary colors on the wheel✓

A complementary pair is one primary plus the secondary made from the other two primaries: red and green, yellow and violet, blue and orange. Combining a pair neutralizes both, which is how a colorist cancels an unwanted tone. Primary colors are the three pure pigments, secondary colors are made from two primaries, and tertiary colors come from a primary plus a neighboring secondary.

A client's brown haircolor has faded to an unwanted red cast. Which base should be added to the refresh formula?

• a.A gold base, to blend the red into a warmer overall result
• b.An orange base, because orange sits next to red on the wheel
• c.A green base, because green is the complement of red✓
• d.A violet base, because violet is the complement of red

Green is the complement of red, so a green base (often labeled matte or neutral) cancels an unwanted red cast. Violet is the complement of yellow, not of red, and orange sits beside red on the wheel rather than opposite it, so both of those would leave the warmth in place. Adding gold would make the result warmer still.

As dark natural hair is lightened, in what order does the underlying warm pigment appear?

• a.Red, then orange, then yellow, then pale yellow✓
• b.Pale yellow, then yellow, then orange, then red
• c.Violet, then blue, then green, then yellow
• d.Green, then blue, then red, then pale yellow

Lightening removes natural pigment in stages, and the warmth that is exposed moves from dark to pale. Hair lifting out of black and brown passes through red, red-orange, orange, gold, yellow, and finally pale yellow. Recognizing which stage the hair has reached tells the colorist how much remaining warmth the toner or target formula still has to neutralize.

In a manufacturer's haircolor line, the 'base color' of a shade means:

• a.the client's natural level measured before any color is applied
• b.the predominant tone built into the shade, which controls the look✓
• c.the volume of developer the shade must be mixed with at the bowl
• d.the percentage of gray hair that the shade is designed to cover fully

Base color is the predominant tone the manufacturer has built into a shade, such as a gold base, an ash base, or a red base. It controls how the finished color reads on the hair and whether the formula will add warmth or cancel it once the underlying pigment is exposed. The client's starting level, the developer choice, and the amount of gray are separate parts of the formulation decision.

Why does a temporary color rinse wash out with a single shampoo?

• a.It is mixed with a low-volume developer that stops working as it dries
• b.Its pigment enters the cortex but is destroyed by contact with water
• c.Its pigment molecules are large and only coat the outside of the cuticle✓
• d.It contains ammonia that evaporates from the strand within a few hours

Temporary color makes no chemical change to the hair. Its pigment molecules are too large to pass through the cuticle, so the color sits on the surface of the strand and is removed the next time the hair is shampooed. Color rinses, mousses, sprays, and color-enhancing gels all work this way, which is why they need no developer and cannot lighten anything.

Which statement correctly describes a traditional semi-permanent haircolor?

• a.It deposits pigment without a developer and fades over several shampoos✓
• b.It is mixed with 20 volume developer and lifts the hair about two levels
• c.It permanently replaces the natural melanin in the cortex of the strand
• d.It coats the cuticle only and is completely removed by one shampooing

A traditional semi-permanent color contains small pigment molecules that enter the cuticle and outer cortex on their own, with no developer added, so it deposits tone but cannot lift. Because nothing locks the pigment in by oxidation, it fades a little with each shampoo instead of growing out. Removal in a single shampoo describes temporary color, and lifting requires an oxidative product.

A client wants richer tone and better gray blending with no lift at all. Which category fits?

• a.A temporary rinse, which coats the strand and rinses away each time
• b.A permanent tint, which lifts and deposits in the same application
• c.An off-the-scalp lightener, which decolorizes the natural melanin
• d.A demi-permanent color, which uses a low-volume developer to deposit✓

Demi-permanent color is an oxidative product mixed with a low-volume developer, but it is formulated to deposit rather than lift, so it adds tone and blends gray without changing the natural level. It lasts longer than a semi-permanent because oxidation locks pigment into the cortex, yet it still fades rather than leaving a hard line. A permanent tint would lift, a lightener would decolorize, and a rinse would wash away.

Six weeks after a permanent color service, a client shows a distinct line where new growth meets the colored hair. This happens because permanent color:

• a.fades evenly out of the hair with every shampoo the client takes
• b.is locked into the cortex and grows out rather than washing out✓
• c.coats the cuticle and is gradually rubbed off by brushing and heat
• d.changes the pigment inside the new growth as the strand emerges

Permanent color oxidizes small dye precursors into large molecules trapped inside the cortex, so it does not shampoo out; the colored hair stays colored while new growth arrives in the client's natural shade. The result is a line of demarcation, corrected with a retouch applied to the new growth only. Fading and rub-off describe the deposit-only and temporary categories, and no product can affect hair that has not yet grown.

Which of the following can lighten the hair's natural pigment?

• a.Permanent color and lighteners only✓
• b.Demi-permanent and semi-permanent colors only
• c.Every category except temporary color
• d.Temporary, semi-permanent, and demi-permanent colors

Lightening natural melanin requires an oxidizing product with enough alkalinity and peroxide to diffuse pigment, and only permanent (oxidative) color and lighteners do that. Temporary and semi-permanent colors contain no developer at all, and demi-permanent color is deliberately formulated to deposit only, even though it is mixed with a low-volume developer. A client who wants to go lighter than her natural level therefore needs a permanent tint or a pre-lightening step.

What does a lightener do to the hair during a lightening service?

• a.It coats each strand with a pale pigment that hides the natural color
• b.It shrinks the cortex so that less natural pigment shows at the surface
• c.It diffuses and dissolves the natural melanin, decolorizing the strand✓
• d.It replaces the melanin with an artificial pigment of the target level

A lightener, sometimes called bleach, is an oxidizing product that diffuses and decolorizes the melanin inside the cortex, so the pigment is destroyed rather than covered. Because the natural pigment comes out in stages, the hair passes through red, orange, and yellow on the way to pale yellow. Lighteners deposit nothing of their own, which is why a toner is normally applied afterward to control the remaining tone.

Traditional powder (off-the-scalp) lighteners carry which important limitation?

• a.They must be mixed with a shampoo rather than with a developer
• b.They are not used directly on the scalp, so they suit off-scalp work✓
• c.They deposit tone as they lift, so a toner is never needed afterward
• d.They lose all of their strength if mixed more than a few seconds before use

Powdered off-the-scalp lighteners are strong and can irritate the skin, so they are used for techniques that keep product away from the scalp, such as foils and cap highlighting, while oil and cream on-the-scalp lighteners are formulated for scalp contact. All lighteners are still mixed with a developer, and they only decolorize rather than deposit, so a toner is usually required. Mixed lightener is used promptly, but it does not fail within seconds.

After pre-lightening a client to a pale yellow stage, the colorist applies a toner. The toner's purpose is to:

• a.lift the hair the last level or two to reach pale yellow
• b.close the cuticle so the lightener cannot keep working
• c.restore the natural melanin the lightener removed
• d.deposit a tone that controls the remaining warmth✓

A toner is a deposit-only color applied to pre-lightened hair to refine the final tone, usually by placing a small amount of complementary pigment against the yellow or orange that remains. It does not lighten, so the hair must already be lifted to the correct stage before it goes on. Nothing can restore melanin once it has been diffused, and it is rinsing, not the toner, that stops the lightener.

A client's ends are dark from a previous tint and she wants them lighter. Applying more permanent color at a higher level will not work because:

• a.artificial pigment already in the hair is not lifted by permanent color✓
• b.permanent color cannot enter a strand that has ever been colored before
• c.the developer in permanent color deposits pigment but never lifts any
• d.colored ends have no cuticle left, so no product will stay on them

Permanent color lifts natural melanin, but it does not lift artificial pigment that is already in the cortex, which is the basis of the rule that color does not lift color. Removing existing artificial pigment calls for a lightener or a color remover, followed by re-depositing the target shade. Permanent color does penetrate previously colored hair, and its developer does lift natural pigment, so the other explanations misstate the chemistry.

In a double-process blonde service, what are the two steps, in order?

• a.A toner removes warmth first, then a permanent tint deposits the blonde
• b.A demi-permanent color lifts the level, then a lightener refines the tone
• c.A lightener lifts the hair to the target stage, then a toner sets the tone✓
• d.A permanent tint lifts and tones at once, then a rinse adds shine on top

A double process means two separate chemical applications: the hair is first pre-lightened to the stage that will support the target shade, then a separate toner or deposit-only color controls the tone. A single-process service does the lifting and depositing in one application of permanent color. A demi-permanent product cannot lift and a toner cannot lighten, so neither of those sequences would reach a pale blonde.

A developer labeled 20 volume contains hydrogen peroxide at what concentration?

• a.3 percent hydrogen peroxide
• b.6 percent hydrogen peroxide✓
• c.9 percent hydrogen peroxide
• d.12 percent hydrogen peroxide

Volume and percentage are two scales for the same strength: 10 volume is 3 percent, 20 volume is 6 percent, 30 volume is 9 percent, and 40 volume is 12 percent, so each step of 10 volume adds 3 percentage points. Twenty volume is the strength most commonly paired with permanent color, because it supplies enough oxygen to develop the dye and cover gray.

Compared with a 10 volume developer, a 40 volume developer will:

• a.release less oxygen and therefore deposit more pigment
• b.work more slowly, because its molecules are much larger
• c.make the finished mixture acidic instead of alkaline
• d.release more oxygen, giving more lift and less deposit✓

The higher the volume, the more oxygen the developer releases and the more natural pigment is diffused out of the cortex. Lift comes at the expense of deposit, so a high-volume mixture leaves less pigment on the strand and is harsher on the hair. Developer strength does not turn an alkaline color mixture acidic, and higher volumes act faster rather than slower.

A client with substantial gray wants permanent color at her existing level, with no lift. Which developer is generally specified?

• a.20 volume, which develops the dye and covers gray without added lift✓
• b.10 volume, which is strong enough to cover gray if left on much longer
• c.30 volume, which is needed to force pigment into resistant gray hair
• d.40 volume, which opens the cuticle of resistant gray most effectively

Twenty volume is the standard choice for gray coverage at the client's existing level: it releases enough oxygen to develop the dye fully and to work through resistant gray, without lifting past the target. Ten volume is generally used for depositing and demi-permanent work, while 30 and 40 volume are lifting strengths that would take the client lighter than she asked. The directions for the specific product always govern.

In a permanent haircolor mixture, what is the job of the ammonia or ammonia-substitute alkalizer?

• a.It bonds the dye molecules to the outside of the cuticle scales
• b.It slows the peroxide down so the color develops more gradually
• c.It raises the pH, swelling the cuticle and activating the peroxide✓
• d.It removes the need to mix the color with a developer at all

The alkalizing agent raises the pH of the mixture, which swells the hair and lifts the cuticle so the dye and the developer can reach the cortex, and it triggers the hydrogen peroxide to release oxygen. Without that alkalinity the peroxide would work far too slowly to lift natural pigment or develop the dye. The alkalizer speeds the reaction rather than slowing it, and it never replaces the developer.

A color line is advertised as ammonia-free but still lifts and covers gray. What is most likely true of it?

• a.It works with no alkalizer at all, at the natural pH of the hair
• b.It contains no developer, so the shade only coats the cuticle
• c.It is a temporary color that has been repackaged as a permanent
• d.It uses an alkanolamine such as MEA in place of ammonia✓

Ammonia-free oxidative colors substitute an alkanolamine, commonly monoethanolamine (MEA), for ammonia. The product is still alkaline and still swells the cuticle so the developer can work; the practical difference is much less odor, because the substitute is far less volatile. Any color that lifts and covers gray must have both an alkalizer and a developer, so it is neither pH-neutral nor developer-free.

Why must oxidative haircolor be mixed immediately before use and never stored after mixing?

• a.The pigment settles to the bottom of the bowl and cannot be stirred back in
• b.Oxidation begins the moment the two are combined and can build up pressure✓
• c.The mixture turns acidic within minutes and will no longer open the cuticle
• d.Mixed color draws moisture from the air and becomes too thin to apply evenly

Combining the color with the developer starts the oxidation reaction at once; the mixture loses strength as it works and cannot give a predictable result later. Oxygen released inside a capped bottle or a sealed container also builds pressure, which is why leftover mixed product is discarded rather than saved. Mix only the amount needed, using the ratio in the manufacturer's directions.

On a bottle of hydrogen peroxide developer, 'volume' is a measure of:

• a.how much oxygen the solution can release relative to its own volume✓
• b.how many fluid ounces of developer belong in a standard mixing ratio
• c.how many levels of lift the finished mixture is guaranteed to give
• d.how thick the developer is, from a thin liquid to a heavy cream

The volume rating states the oxidizing potential of the solution: a 20 volume developer can release roughly twenty times its own volume in oxygen gas. That is why volume converts directly to a percentage strength, with 20 volume equal to 6 percent. The levels of lift actually achieved depend on the color or lightener and on the hair itself, and thickness is a matter of formulation, not of the volume number.

Which is the correct practice when mixing a color or a lightener with developer?

• a.Use a metal bowl and whisk, which conduct heat and speed the reaction
• b.Add developer by eye until the mixture reaches a comfortable thickness
• c.Use a nonmetallic bowl and applicator and the maker's stated ratio✓
• d.Mix a double batch so leftover product is ready for the next retouch

Color and lightener are mixed in nonmetallic bowls, usually plastic or glass, with nonmetallic applicators, because metal can react with the peroxide and change the result. The ratio of color to developer is set by the manufacturer for that specific line and is measured rather than estimated, since it governs both consistency and strength. Mixed product is used at once, so a double batch would simply be wasted.

The patch test site on a client's inner elbow is red, itchy, and swollen when she returns for her color appointment. What should the cosmetologist do?

• a.Perform the service, but leave the color on for half the usual time
• b.Decline the color service and refer the client to a physician✓
• c.Wash the site, repeat the patch test on the other arm, and proceed
• d.Apply barrier cream along the hairline and perform the service as booked

Redness, itching, swelling, or blistering at the test site is a positive reaction, meaning the client is sensitive to an ingredient in the product. The service must not be performed, and the client is referred to a physician, since a reaction across the scalp can be far more severe than one on a small test area. Shortening the timing, retesting elsewhere, or using a barrier cream does not remove the allergen from the product.

What does a preliminary strand test tell the colorist that a patch test does not?

• a.Whether the client is allergic to an aniline derivative in the product
• b.Whether the client's scalp has any abrasions before the application
• c.Whether the salon's water is hard enough to affect the finished result
• d.What the finished color will look like and how long it needs to process✓

A strand test is performed on a small section of the client's own hair with the actual formula, and it predicts the resulting shade, the processing time, and how the hair will behave. A patch test is a skin test performed before the service to detect an allergic reaction, and it says nothing about the color result. Both are carried out as directed by the manufacturer, and each answers a different question.

A product's directions state a processing time that differs from the routine a stylist has always used. Which should be followed?

• a.The directions supplied by the manufacturer of that specific product✓
• b.The routine, since hands-on experience outweighs a printed insert
• c.The average of the two times, balancing experience against caution
• d.The longer of the two times, because more processing is always safer

Processing times, mixing ratios, and developer choices are set by the manufacturer for each specific product, and following them is the standard the professional is held to. Ignoring them risks over- or under-processing and undermines any defense if the client is harmed. A strand test is the correct way to confirm timing for a particular head of hair, while averaging or extending times is guesswork, and longer processing is not automatically safer.

During a lightening service, how should the stylist decide when to rinse?

• a.Rinse at the maximum time in the directions, whatever the hair looks like
• b.Check a test strand at intervals and rinse when the target stage is reached✓
• c.Rinse as soon as the lightener on the foils has begun to dry at the edges
• d.Rinse once the lightener itself has changed from white to a pale yellow

Lightening is judged visually: the stylist wipes a test strand at intervals to see which stage of underlying pigment has been reached, and rinses when the hair arrives at the target stage, without ever exceeding the maximum time in the directions. Lightener drying at the edge of a foil, or the color of the product in the bowl, tells you nothing about the stage the hair has reached. Any burning or discomfort means removing the product at once.

When permanent waving lotion is applied to hair wrapped on rods, the chemical change is:

• a.reduction, which breaks disulfide bonds so the hair takes the rod's shape✓
• b.oxidation, which hardens the keratin around each rod into a fixed curl
• c.lanthionization, which converts disulfide bonds into a permanent new bond
• d.hydration, which breaks hydrogen bonds and holds the curl until it is wet

Waving lotion is a reducing agent, usually ammonium thioglycolate, that adds hydrogen to the hair and splits the disulfide (sulfur) bonds in the cortex, letting the softened strand conform to the diameter of the rod. Oxidation is the opposite, second step performed by the neutralizer. Lanthionization is the reaction of hydroxide relaxers, and breaking hydrogen bonds is what plain water does in a temporary wet set.

What does the neutralizer do at the end of a permanent wave?

• a.It softens the hair a second time so that the curl can relax slightly
• b.It lowers the pH only, leaving the broken bonds to rejoin on their own
• c.It oxidizes the hair, rebuilding disulfide bonds in the new curl shape✓
• d.It coats the curl in a polymer film that holds the shape until shampooed

Neutralizing is an oxidation step, most often using hydrogen peroxide, that removes the hydrogen the waving lotion added and rebuilds the disulfide bonds while the hair is still on the rods, locking in the new shape. The hair is rinsed thoroughly and blotted first, so that leftover lotion does not dilute the neutralizer. The client is then told to wait the time given in the manufacturer's directions before the first shampoo.

Two clients receive the same perm chemistry, but one is wrapped on small-diameter rods and one on large. What is the difference in the result?

• a.The small rods give a looser wave that relaxes faster over the weeks
• b.Rod diameter changes only how long the lotion has to process
• c.The large rods give a tighter curl, because more hair fits on each rod
• d.The small rods give a tighter curl, and the large rods a looser wave✓

Curl size is set mechanically by the diameter of the tool: the smaller the rod, the smaller the circle the hair is bent into and the tighter the resulting curl. Rod diameter also guides the base size, which should be no wider than the diameter of the rod so the hair lies smoothly, and end papers keep the ends flat and prevent fishhooks. Processing time is governed by the product, the hair's condition, and the directions, not by rod size.

A perm rod placed so that it sits within its own base section, with the hair directed up and over, produces:

• a.the least volume at the scalp, because the hair is directed downward
• b.the greatest volume at the scalp, because the hair is directed upward✓
• c.no change in volume, since placement affects only the curl diameter
• d.a curl that starts at the ends, leaving the base section fully straight

On-base placement holds the hair up and away from the head so the curl begins close to the scalp, which gives the most lift and volume at the base. Half-off-base placement, wrapped straight out from the section, gives moderate volume, and off-base placement, directed below the section, gives the least. Rod diameter controls the size of the curl, while placement controls where the volume sits.