NV Barber key terms

The chemical process that destroys most disease-producing microorganisms on nonporous tools and surfaces, but not bacterial spores. Barbers apply it to clippers, shears, and combs after cleaning off hair and debris.

The complete destruction of all microbial life, including bacterial spores, usually achieved with an autoclave using steam under pressure. Required in Nevada for tools that contact blood or are used on broken skin.

The first step of tool care: physically removing hair, skin, product residue, and visible soil with soap and water before any disinfectant is applied. Disinfectants cannot penetrate dirt, so skipping this step makes the next step ineffective.

An EPA-registered product labeled as a tuberculocidal disinfectant, meaning it kills Mycobacterium tuberculosis and is strong enough for bloodborne pathogen spills. Nevada requires this level for implements that may contact blood or skin.

A pressure vessel that sterilizes metal implements with high-pressure steam. Tools must be cleaned and dried first, pouches must be left slightly open for steam penetration, and the unit needs regular spore testing to prove it works.

Disease-causing microorganisms carried in blood and other body fluids, including hepatitis B, hepatitis C, and HIV. Barbers must assume every client could carry them and use gloves, disinfectants, and sharps handling rules accordingly.

The practice of treating all blood, body fluids, and non-intact skin as potentially infectious regardless of a client's appearance or stated health status. Gloves, handwashing, and barrier protection are applied to every client, every time.

A specific event where blood or other potentially infectious material contacts broken skin, mucous membranes, or the eyes. The barber should wash the area, report it to the shop owner, and seek medical evaluation promptly.

A document supplied by the manufacturer that lists a chemical product's hazards, safe handling, first aid, and storage requirements. Shops must keep these sheets accessible for every hazardous product on the premises.

Nonporous items such as metal shears and plastic combs can be disinfected and reused. Porous items such as towels, neck strips, and wooden sticks absorb liquids, cannot be reliably disinfected, and must be discarded after a single use.

A product designed to be used on one client and then thrown away, such as straight razor blades, neck strips, and wooden applicators. It must never be disinfected and reused, even if it looks clean.

A puncture-resistant, leak-proof, labeled container used to discard razor blades, broken glass, and other sharp items that could cut skin. It is kept upright near the workstation and closed when full.

A light, gliding massage stroke applied with the palms and fingers, always moving upward toward the heart. It begins and ends a scalp massage and helps relax the client before deeper movements.

A kneading, lifting, and squeezing massage movement that works deeper into muscle and scalp tissue. It follows effleurage once the client is relaxed and is performed with the pads of the fingers, never the nails.

A brisk, rhythmic tapping or hacking movement made with the fingertips or edges of the hands. Used briefly on the scalp and shoulders, it stimulates circulation and is avoided over bones or inflamed areas.

The hair's ability to absorb and hold moisture, determined by how tightly the cuticle layers lie. Low-porosity hair resists moisture and products, while high-porosity hair absorbs quickly but loses moisture fast and feels rough.

How far a strand stretches and returns to its original length without breaking. Wet hair stretches more than dry hair; low elasticity signals weak, overprocessed hair that should not receive another chemical service.

Oil glands attached to hair follicles that secrete sebum, the scalp's natural lubricant. Overactive glands contribute to oily scalp and hair, while underactive glands leave scalp and hair dry and flaky.

The oily substance produced by sebaceous glands that coats the hair shaft and scalp, slowing moisture loss and giving hair shine. Shampoo removes excess sebum, and harsh shampoos can strip too much of it.

A 0-to-14 scale measuring acidity and alkalinity, with 7 neutral. Hair and scalp are mildly acidic near 4.5 to 5.5, so alkaline shampoos swell the cuticle and open it while acidic products smooth and close it.

Partial or complete hair loss, which can be temporary or permanent and has many causes including genetics, illness, medication, and stress. Barbers recognize it but do not diagnose or treat it, and refer clients to a physician.

A contagious fungal infection of the scalp, also called ringworm, marked by round scaly patches and broken hairs. It is a contraindication for service; the barber refers the client to a physician and disinfects all tools.

Infestation with head lice, which appear as tiny insects or nits attached to hair shafts near the scalp. Service is refused, the client is referred for treatment, and the workstation and tools are cleaned and disinfected.

Any condition, product, or circumstance that makes a service unsafe or inadvisable, such as open sores, contagious scalp disease, or overprocessed hair. The barber withholds or modifies the service and refers the client when appropriate.

Dividing the hair into controlled, evenly sized subsections with clips before cutting, coloring, or styling. Clean sectioning keeps the guide lines visible, prevents uneven results, and makes the cut predictable on both sides.

The first cut strand or section that sets the length and shape all other sections follow. It may be stationary, where one fixed guide controls the whole cut, or traveling, where each new section becomes the guide for the next.

The angle at which hair is held away from the head before cutting, measured from the scalp. Zero elevation builds weight and length, 45 degrees layers, and 90 degrees creates uniform layers and graduation.

A cutting technique where hair is held at an angle so lengths stack on top of each other, creating a wedge or stacked effect at the perimeter. It adds volume and weight at the bottom of the shape.

Cutting techniques such as point cutting, notching, and slicing that remove bulk, soften weight lines, and create movement without changing the overall length. It is done last, after the main shape is established.

Shaping and drying wet hair with a blow dryer and brush, working from the scalp outward and directing air down the hair shaft to smooth the cuticle. Sectioning and tension control determine whether the finish is smooth or full.

A thermal styling method that temporarily straightens curly or tightly coiled hair using a heated pressing comb or thermal iron. It must be done on clean, dry hair with controlled heat to avoid scalp burns and heat damage.

A lubricating mixture of shaving soap or cream and water, worked into a rich foam and applied to soften the beard and protect skin. Proper lather lets the razor glide and reduces nicks, razor burn, and ingrown hairs.

The direction and angle the razor travels across the face. Strokes follow the grain for a closer shave with less irritation, use light pressure, and avoid repeat passes over the same area without relathering.

Redness and irritation after shaving, caused by too much pressure, a dull blade, shaving against the grain, or insufficient lather. Prevention includes a fresh blade, warm water, and light strokes with the grain.

Razor bumps caused when cut hair curls back and grows into the skin, common in clients with tightly curled beards. Barbers avoid close shaving against the grain and refer persistent cases to a physician.

A strong alkaline chemical cream, usually sodium hydroxide or guanidine hydroxide, that straightens curly hair by breaking disulfide bonds in the cortex. It requires a patch test, thorough rinsing, and strict timing to avoid burns.

The strong chemical link between sulfur atoms in the cortex that gives hair its curl and strength. Relaxers and permanent waves break these bonds and reform them in a new shape, which is why overprocessing weakens hair.

A small amount of chemical product applied to the skin, usually behind the ear or on the inner arm, 24 to 48 hours before the full service. It checks for allergic reaction and is required before certain color and relaxer services.

The pre-service conversation and assessment covering the client's hair history, prior chemical services, medications, allergies, and desired result. It identifies contraindications and sets realistic expectations before any product is applied.

A test performed on a small cutting of the client's hair to predict how a color, relaxer, or wave will react and how long processing should take. It protects the full head from unexpected damage or uneven results.

The body system made up of skin, hair, nails, and glands, forming the body's outer protective covering. Barbers work directly on these structures, so understanding their layers and functions guides safe service decisions.

The thin, outermost, avascular layer of skin that continuously renews itself and provides the first barrier against infection. Cuts and abrasions here open a route for pathogens, so any break in skin changes the service plan.

The thicker layer beneath the epidermis containing blood vessels, nerves, sweat glands, sebaceous glands, and hair follicles. Because it holds the follicle and its blood supply, damage reaching the dermis can scar and affect hair growth.

The tube-shaped pocket in the dermis from which a hair grows, fed by a small blood supply at its base. The shape of the follicle helps determine whether hair grows straight, wavy, or tightly curled.

The outermost layer of the hair shaft, made of overlapping scales that protect the inner structure. When the cuticle is smooth and closed, hair looks shiny; when it is raised or damaged, hair feels rough and loses moisture.

The middle and thickest layer of the hair shaft, containing the fibers that give strength and elasticity and the pigment that gives color. All chemical texture and color changes happen in the cortex.

The innermost core of the hair shaft, made of loosely packed cells and sometimes absent, especially in fine hair. It contributes little to strength or appearance and has no role in chemical processing.

The nail plate sits on the nail bed, surrounded by the cuticle and sidewalls, with the free edge extending past the fingertip. Nail appearance can signal health problems, and barbers observe rather than diagnose them.

Recognizing changes such as discoloration, thickening, separation, or swelling around the nail and sending the client to a physician instead of performing services. These signs may indicate infection or systemic disease and are outside the barber's scope.

The state agency that licenses barbers, shops, and instructors and enforces Nevada's barbering statutes and regulations. It sets sanitation standards, inspection procedures, and the disciplinary process for violations.

The state-issued credential that allows a barbershop to operate lawfully in Nevada. It must be displayed, kept current, and tied to a licensed barber who meets ownership and supervision requirements.

Required coursework that licensed barbers complete during each renewal cycle to keep their license active. Hours, subject requirements, and deadlines are set by state regulation and must be documented when renewing.

An official review of a shop's cleaning practices, tool storage, disinfectant use, and records by a board inspector. Passing requires routine compliance, not a last-minute cleanup, and violations can bring fines or license action.