LA Barber key terms

To reduce the number of germs on a surface or tool to a level considered safe by public health standards, usually by washing with soap and water or using a low-level disinfectant. It is a lower level of protection than disinfection or sterilization.

A chemical product registered with the EPA that kills most harmful organisms on hard, nonporous surfaces. In a barbershop it is used on clippers, shears, combs, and work surfaces after cleaning, mixed and used exactly as the label directs.

The complete destruction of all microbial life, including bacterial spores, on an object. It is usually done with an autoclave and is required for items that cut or penetrate skin, such as certain tools used in some shops; standard barber tools are normally disinfected, not sterilized.

Microorganisms such as hepatitis B and C viruses and HIV that can be transmitted through contact with blood or other potentially infectious body fluids. Barbers must follow exposure-control rules, including handwashing, gloves, and proper handling of blood-contaminated items.

A written shop document that identifies tasks with risk of contact with blood or body fluids, names the person responsible for the plan, and describes protective equipment, cleanup steps, and post-exposure reporting. It must be reviewed and updated regularly and be available to workers.

The practice of treating all blood and body fluids as if they are infectious, regardless of whether a client appears healthy. It means wearing gloves, using barriers, and disinfecting correctly for every client, every time.

The number of hairs per square inch on the scalp, usually described as thin, medium, or thick. It affects how much tension a comb or shear can take, how products spread, and how much hair is removed in a cut.

The diameter of a single strand of hair, described as coarse, medium, or fine. Coarse hair is thick and strong, fine hair is small and fragile, and texture guides tool choice, tension, and product amounts.

The direction in which hair grows from the scalp, including cowlicks, whorls, and forward or backward flow. Cutting against the natural pattern can cause gaps or uneven lines, so the barber works with the pattern.

The ability of wet hair to stretch and return to its original length without breaking. Healthy hair stretches noticeably; low elasticity means weak, damaged hair that is a poor candidate for chemical services.

The ability of hair to absorb and hold moisture, related to the condition of the cuticle. Low-porosity hair resists moisture, high-porosity hair absorbs quickly and loses it quickly, and porosity helps predict color and relaxer results.

The tough outer layer of the hair shaft made of overlapping scale-like cells. When it lies flat, hair looks smooth and shiny; when it is raised or damaged, hair feels rough, tangles, and takes color unevenly.

The middle layer of the hair shaft, made of long protein fibers, that gives hair its strength, elasticity, and color. Chemical services such as coloring and relaxing work by changing the cortex, which is why damage there is permanent.

The innermost core of the hair shaft, a soft, sometimes hollow center. It is not present in every hair and plays little role in barbering services, but it is part of the basic anatomy of the hair.

A painful, pus-filled infection of a hair follicle, often called a boil. It is contagious, so the barber must not shave or cut over it, must refer the client to a physician, and must disinfect any tool that touches the area.

A fungal infection of the beard area and skin that causes round, scaly, itchy patches and hair loss. It is contagious, so the barber refuses service, refers the client to a doctor, and disinfects all implements and linens.

A condition of ingrown hairs and inflammation in the beard area, common in clients with tightly curled hair after close shaving. The barber can help by using proper shaving technique and by recommending the client avoid very close shaves.

A small, irritated bump that forms when a shaved hair curls back and grows into the skin, or when bacteria enter a shaved follicle. Prevention includes softening the beard, shaving with the grain, and keeping tools clean.

Any condition or circumstance that makes a service unsafe or unwise to perform, such as contagious skin disease, open sores, or a scalp infection. When a contraindication is present, the barber declines the service and refers the client appropriately.

A warm, moist foam worked into the beard to soften hair, lubricate the skin, and hold the hairs upright for cutting. Good lather reduces friction and razor burn and is applied with a clean brush or by hand.

Shaving or cutting in the direction opposite to the natural growth of the hair. It gives a closer shave or cut but raises the risk of irritation and ingrown hairs, so it is used carefully and never over inflamed skin.

A haircut in which the hair is shortened gradually from a longer length at the top to a shorter length at the neckline and sides. A taper blends smoothly rather than ending in a hard line, and it is a core cutting skill.

A taper cut that blends from skin-level or very short hair at the bottom to longer hair at the top with no visible lines. The barber controls the blend with clipper guards, blade position, and careful detail work.

Dividing the hair into clean, controlled subsections with clips or comb so each area can be cut, colored, or relaxed evenly. Good sectioning keeps the barber organized and prevents missed or overcut areas.

A plastic or metal attachment that fits over the clipper blade to leave hair at a set length. Guards are numbered by length, and using them correctly keeps the cut consistent and protects the client's scalp.

A cutting technique in which the barber holds a comb against the head and runs the clipper over it to remove hair to the comb's length. It is used for blending and for cutting bulk on the sides and back.

A small test of a chemical product on the client's skin, done before a color or other chemical service to check for an allergic reaction. Results are read after the time stated on the product label, and a positive reaction cancels the service.

A test on a small section of the client's hair to predict how a color, relaxer, or permanent wave will perform. It shows timing, resulting color or curl, and whether the hair can safely take the chemical.

A hydrogen peroxide solution that, when mixed with hair color, opens the cuticle and develops the color inside the hair. Its strength, measured in volume, controls how much lift or deposit occurs and must match the product instructions.

A strong alkaline chemical product that straightens tightly curled or wavy hair by breaking and reforming bonds in the cortex. It requires careful timing, protection of the scalp, and thorough rinsing to avoid burns and breakage.

The product applied after a relaxer or permanent wave to stop the chemical action and rebuild bonds in the hair. It restores the hair's shape and strength, and incomplete neutralizing leaves hair weak and prone to breakage.

A controlled series of movements on the face and neck, such as effleurage and petrissage, used to relax muscles and improve circulation. It is performed after cleansing, with clean hands, and is avoided over skin disease or inflammation.

A light, gliding massage stroke that follows the contours of the face and neck, used to begin and end a massage and to apply product. It warms the skin and helps the client relax before deeper movements.

A kneading or lifting massage movement that works deeper into the muscles, used on the neck, jaw, and shoulders. It relieves tension and is done gently on the face, always following the direction of the muscle fibers.

A device that uses high-pressure steam to sterilize tools that contact blood or break the skin. Tools must first be cleaned, then loaded so steam reaches all surfaces, and the cycle must be monitored for effectiveness.

A cutting tool with two blades joined by a pivot, used to cut and shape hair. Shears must be kept sharp, cleaned of hair and moisture, and disinfected between clients; dull shears pull and damage the hair.

A folding razor with a single sharp blade, used for close shaves and beard outlining. It must be held at a low angle, stropped to keep the edge keen, and handled with care because it can cut skin easily.

The credential issued by the state board that allows a person to practice barbering lawfully. It must be displayed in the shop, kept current, and renewed on time; practicing without one is a violation of state law.

The state-issued permit that allows a barbershop to operate at a specific address. It must be posted in the shop, and a shop may not open or change ownership without meeting board requirements and inspection.

An official review of a barbershop's cleanliness, equipment, and records by the state board or its representative. Shops must pass inspection to hold a license, and inspectors may check disinfection practices and license posting.

The set of services a licensed barber is legally allowed to perform, such as cutting, shaving, and certain chemical services, and the services that are outside that authority. Working outside the scope can lead to discipline or license loss.

The standards of honesty, confidentiality, respect, and responsible conduct that guide a barber's dealings with clients, coworkers, and the public. Ethics includes refusing unsafe services and keeping client information private.

A client's clear agreement to a service after being told what it involves, its risks, and its likely results. The barber explains the process and confirms the client understands before starting, especially for chemical services.