MS Barber key terms

Using a chemical product made for the purpose to destroy most harmful microorganisms on hard, nonporous surfaces and implements. It does not destroy bacterial spores and is not the same as sterilization.

The complete destruction of all microbial life, including bacterial spores, usually done with an autoclave using steam under pressure. It is required for items that penetrate skin or contact blood.

A product carrying an Environmental Protection Agency registration number on its label, showing it has been reviewed for effectiveness against listed organisms when used exactly as the label directs.

Disease-causing microorganisms such as hepatitis B, hepatitis C, and HIV that travel in blood and can pass to another person through contact with infected blood or body fluids.

Treating all blood, body fluids, and potentially infectious materials as if they carry disease, and using gloves and other barriers with every client regardless of known health status.

A standardized document from a product manufacturer listing a chemical's hazards, safe handling, first-aid steps, and storage needs. Shops must keep an SDS for each chemical product on hand.

The angle at which hair is held away from the head before it is cut. Low elevation builds weight, medium elevation adds some layering, and high elevation removes weight and creates shorter layers.

The first section of hair that is cut and then used as the reference point for length and shape in all following sections. Also called a guide.

Cutting hair so each section is slightly longer than the one below it, creating a stacked or layered effect with weight built at the perimeter or toward the crown.

A gradual shortening of hair toward the hairline and neckline, blending longer hair on top into shorter sides and back without leaving a visible line of separation.

A cutting technique in which clippers run along the back of a comb held in the hair, removing length while the comb shields the scalp and limits how much hair is cut.

Re-cutting a section of hair from the opposite direction of the original cut to confirm the length is even, catching mistakes that are hidden when hair is combed only one way.

Shaving in the direction opposite to hair growth. It produces a closer shave but raises irritation risk and ingrown hairs, especially on sensitive or tightly curled hair.

Grinding a straight razor's edge on a stone to restore its shape and sharpness after the edge has dulled or been nicked. Honing comes before stropping in razor care.

Drawing a sharpened straight razor across a leather strop to smooth and polish the cutting edge and remove tiny burrs. It does not restore a dull edge the way honing does.

Redness, stinging, and roughness of the skin after shaving, caused by friction, a dull blade, too much pressure, or shaving without enough preparation and lubrication.

The defined outline that shapes a beard or mustache, set along the cheek, jaw, neck, and lip according to the client's natural growth pattern and facial proportions.

A small amount of product applied to skin, usually behind the ear or in the elbow crease, and left 24 to 48 hours to check for an allergic reaction before full application.

A hydrogen peroxide solution mixed with hair color or lightener to open the cuticle and start the chemical reaction. Its strength, measured in volume, controls how much lightening occurs.

Removing natural or artificial pigment from hair with a lightener to reach a lighter level of color. The hair becomes more porous and fragile as more pigment is removed.

A strong alkaline cream applied to curly or textured hair to break side bonds and permanently straighten the wave pattern. It requires careful timing, thorough rinsing, and a neutralizing step.

A low-pH shampoo or solution used after a relaxer to stop the chemical action and restore the hair's normal acidity. Skipping or rushing it can leave hair over-processed and breakable.

A condition that makes a treatment unsafe or inadvisable for a client, such as an open sore, sunburn, or contagious scalp infection. Barbers check for these before starting any service.

A light, continuous stroking movement used in scalp and facial massage, performed with palms and fingertips in the direction of muscle flow to relax the client and improve circulation.

A visual and manual examination of the client's scalp condition, hair density, texture, porosity, and elasticity, used to choose suitable products and services and to spot disorders.

The specific services and procedures a licensed barber is legally allowed to perform under state law. Working outside it can bring fines, license suspension, or loss of the license.

The legal authorization to practice barbering, granted by a state board after the candidate meets education, examination, and health requirements. A license must be current and displayed as required.

An arrangement in which one state recognizes another state's barbering license, usually with added requirements such as a fee, an exam, or minimum hours, so the holder may practice there.

A conversation before the service in which the barber asks about the client's goals, hair history, and lifestyle, then explains what is possible and confirms the plan and price.

A confidential file noting a client's services, formulas, products used, reactions, and preferences. It supports consistency, helps trace problems, and protects both the client and the barber.

Explaining the risks, benefits, and alternatives of a service and confirming the client freely agrees to proceed. It matters most for chemical services and clients with sensitive skin.

Keeping a client's personal details, health information, and service records private and sharing them only with the client's permission or when the law requires it.

The active growth phase of the hair cycle, when cells in the follicle divide and new hair forms. It lasts roughly two to six years and sets how long hair can grow.

The resting phase of the hair cycle, when growth stops and the old hair is eventually shed. About 10 to 15 percent of scalp hairs are in this phase at any time.

Oil glands attached to hair follicles that release sebum onto the skin and hair. Sebum lubricates and waterproofs both, helping keep them supple and protected.

The pigment made by melanocytes that gives hair and skin their color. Its type and amount decide whether hair appears blond, red, brown, or black.

A contagious fungal infection of the bearded area of the face and neck, marked by redness, scaling, and sometimes pus-filled bumps. It blocks service and needs medical referral.

Razor bumps formed when tightly curled hair grows back into the skin after shaving, causing inflamed bumps in the beard area. Better shaving technique manages it rather than closer shaving.

Partial or complete hair loss that may be temporary or permanent and can result from genetics, illness, medication, stress, or damaging hair practices. Barbers refer rather than treat it.