WI Esthetician key terms

A process that destroys most harmful microorganisms, except bacterial spores, on hard nonporous surfaces and tools. In esthetics it is used on implements that contact intact skin or that cannot be sterilized.

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

The lowest level of decontamination: washing with soap or detergent and water to remove visible debris, oils, and many germs before disinfection or sterilization. It never replaces disinfection on reusable implements.

A product carrying an Environmental Protection Agency registration number and labeled hospital-grade, meaning it is proven effective against a broad range of pathogens when used exactly as the label directs.

Microorganisms such as hepatitis B, hepatitis C, and HIV that are present in blood and can be transmitted through needlesticks, cuts, or contact with mucous membranes and broken skin.

Infection-control practices applied to every client regardless of known health status, including handwashing, gloves, and treating all blood and body fluids as potentially infectious.

The transfer of germs from one person, tool, or surface to another, often by hands, dirty implements, or contaminated products such as a used spatula dipped back into a jar.

A standardized document supplied by a product manufacturer that lists a chemical's hazards, safe handling, first-aid measures, and storage requirements; it must be kept accessible in the workplace.

A device that sterilizes metal implements by exposing them to high-pressure steam at high temperature; items must be cleaned and dried first and packaged according to the manufacturer's instructions.

The outermost, avascular layer of the skin, made of stratified keratinized cells that continually renew from the basal layer. It provides the body's first barrier against water loss and outside irritants.

The middle layer of skin beneath the epidermis, containing collagen, elastin, blood vessels, nerves, glands, and hair follicles. It supplies nutrients to the epidermis and gives skin strength and elasticity.

The outermost sublayer of the epidermis, composed of flattened dead keratin-filled cells that shed continuously. Its condition, along with intercellular lipids, largely determines how hydrated and smooth skin looks.

A cell in the basal layer of the epidermis that produces melanin pigment and transfers it to surrounding keratinocytes, giving skin its color and some protection from ultraviolet radiation.

A gland usually attached to a hair follicle that secretes sebum onto the skin surface, lubricating skin and hair. Overactivity contributes to oily skin, enlarged pores, and acne.

The slightly acidic film on the skin surface, formed by sebum, sweat, and skin cell breakdown products, with a pH of roughly 4.5 to 5.5. It helps limit bacterial growth and supports barrier function.

The main structural protein of the dermis, forming fibers that give skin strength and support; it declines with age and sun exposure. Elastin, its elastic partner, lets skin stretch and recoil.

The deepest skin layer, made mostly of fat and connective tissue, which cushions the body, insulates it, and anchors the skin to underlying muscle and bone.

A plugged hair follicle; open comedones (blackheads) have a widened dark opening, while closed comedones (whiteheads) sit beneath a closed pore and appear as small white bumps.

Excessive secretion of sebum, leading to oily skin, especially in the T-zone. It is a condition rather than a skin type and can accompany acne and seborrheic dermatitis.

A chronic inflammatory condition causing flushing, redness, and visible blood vessels, usually on the cheeks and nose, sometimes with papules or pustules. It is triggered by heat, sun, alcohol, and spicy food.

A pattern of blotchy brown to gray-brown hyperpigmentation on sun-exposed areas, most often the cheeks, forehead, and upper lip. Hormones, ultraviolet light, and heat are common triggers.

A six-category classification of skin type based on how skin responds to ultraviolet light, from always burning to rarely burning. Estheticians use it to judge sun sensitivity and select treatment intensity.

Skin type is the largely inherited baseline of oiliness or dryness (normal, dry, oily, combination); a skin condition is a temporary or treatable state such as dehydration, acne, or sensitivity that can change.

Any condition, medication, or circumstance that makes a treatment unsafe or inadvisable, such as isotretinoin use, pregnancy, active infection, or recently waxed skin before a peel.

The removal of dead surface cells through mechanical means such as scrubs and brushes, or chemical means such as acids and enzymes, revealing smoother, brighter skin underneath.

A professional treatment that applies an acid solution to remove controlled layers of skin, improving texture, pigmentation, and acne. Strength, depth, and neutralization depend on the specific acid and concentration.

An ingredient that attracts and holds water in the skin, such as glycerin, hyaluronic acid, or sodium PCA. Humectants hydrate but need an occlusive or emollient to prevent water loss.

An ingredient that softens and smooths skin by filling gaps between surface cells and improving flexibility, such as plant oils, fatty acids, and some silicones.

A molecule with both water-loving and oil-loving ends that lets water mix with oil and debris, allowing cleansers to lift dirt and sebum from the skin so it can be rinsed away.

Manual removal of comedones, milia, or follicular debris during a facial, performed only on clean skin with proper technique and pressure within the esthetician's legal scope.

A small controlled application of a product on a discreet area, such as behind the ear or inner forearm, checked after 24 to 48 hours to detect an allergic or irritant reaction before full use.

The set of services and procedures a licensee is legally trained and permitted to perform. In Wisconsin, estheticians treat the skin superficially and may not diagnose disease or perform medical procedures.

A client's voluntary agreement to a treatment or product after being told what it involves, its likely results, and its risks, given without pressure and documented in the client record.

The professional duty to keep a client's personal, health, and treatment information private, discussing it only with the client and sharing it solely with consent or as the law requires.

The state agency that licenses and regulates Wisconsin estheticians, issues and renews credentials, and enforces the cosmetology and esthetics rules under the Wisconsin Administrative Code.

Required ongoing training hours a licensed esthetician must complete during each renewal cycle to keep the license active and stay current on safety, techniques, and Wisconsin rules.

Coverage that protects an esthetician against claims of injury or harm arising from services provided, typically covering legal defense and damages up to a policy limit.