DE Nail Technician key terms

A fungal infection of the nail plate, bed, or surrounding tissue, often causing thickening, discoloration, and crumbly edges. It is a contraindication for nail services and requires referral to a physician.

Inflammation or infection of the tissue surrounding the nail, marked by redness, swelling, and pain. A technician must not perform services on an inflamed or infected area and should refer the client for medical care.

Separation of the nail plate from the nail bed, leaving a whitish or hollow area at the free edge. It may result from trauma, improper filing, or underlying disease and should be treated cautiously.

A condition or circumstance that makes a nail service unsafe or inadvisable, such as infection, open wounds, or severe inflammation. Recognizing contraindications protects both the client and the technician.

The visible, hard keratin structure covering the tip of each finger or toe. It is formed by keratinized cells produced at the matrix and protects the sensitive nail bed beneath it.

The pinkish layer of skin directly beneath the nail plate, containing blood vessels and nerve endings. It attaches to the underside of the plate and is visible through a healthy nail.

The living tissue at the base of the nail where new nail cells are produced. Damage to this area can cause permanent ridges, grooves, or changes in nail shape.

The pale, half-moon shape visible at the base of the nail plate. It is the visible portion of the matrix and appears lighter because new cells have not yet fully hardened.

The thin layer of dead skin that seals the gap between the nail plate and the skin at the base of the nail. It protects against infection and should be softened and gently pushed, never cut deeply.

The living skin at the base of the nail that extends onto the nail plate, often confused with the cuticle. It should not be cut or aggressively pushed back because it is living tissue.

The skin under the free edge of the nail plate, sealing the nail bed from the environment. It protects against debris and infection and can be damaged by excessive filing or cleaning beneath the edge.

The portion of the nail plate that extends beyond the fingertip or toe tip. It is filed and shaped during services and has no underlying nail bed.

The tough protein that makes up the nail plate and hair. Its layers give the nail strength and flexibility, and its condition affects how the nail responds to filing and product application.

A skin condition affecting the nails, causing pitting, ridges, and separation of the plate. It is not contagious but may require medical treatment; technicians should avoid irritating the area.

Horizontal grooves across the nail plate caused by an interruption in matrix growth, often after illness or trauma. They grow out with the nail and are not treated by the technician.

The process of killing most pathogenic microorganisms on surfaces and tools using an approved product. It is required for implements after each client and is not the same as cleaning or sterilization.

The complete destruction of all microorganisms, including spores, on an implement. It is used for items that penetrate the skin and is stronger than disinfection.

The process of reducing the number of microorganisms on a surface to a safe level by cleaning with soap and water or a sanitizing product. It is the first step before disinfection.

A device that sterilizes implements using high-pressure steam. It is used for metal tools that can withstand heat and moisture and must be monitored for proper operation.

A document providing safety information about a product, including hazards, handling, and first-aid measures. Technicians must keep these sheets accessible for all chemicals in the salon.

The movement of fresh air through a workspace to remove fumes, dust, and vapors. Proper ventilation protects technicians and clients from exposure to chemicals and airborne particles.

The liquid component that reacts with polymer powder to form acrylic nail enhancements. It is flammable, gives off strong vapors, and must be used with adequate ventilation and safe handling.

The powder component of acrylic enhancements, containing finely ground polymer particles and pigments. It is mixed with monomer to create a workable bead that hardens on the nail.

The small ball of mixed acrylic monomer and polymer formed on the brush before application. Its consistency determines how the product flows and sets on the nail.

A light-cured nail enhancement product that hardens only when exposed to a UV or LED lamp. It requires proper curing time and should not touch skin during application.

The process by which gel products harden under a UV or LED light. Incomplete curing leaves the surface tacky and weakens the enhancement.

A light source used to cure gel products through a specific wavelength. It cures faster than traditional UV lamps but must match the product's requirements.

A liquid applied to the natural nail before enhancement products to improve adhesion and reduce lifting. It should be used sparingly and kept off the skin.

The separation of an enhancement product from the natural nail, usually starting at the edges or cuticle area. It results from poor preparation, moisture, or improper application.

A product applied to the natural nail to remove moisture and oils before enhancement application. It helps products adhere and reduces the risk of lifting.

Shaping and reducing the nail plate or enhancement using an abrasive tool. Proper filing technique protects the natural nail and prevents damage to the sidewalls and free edge.

A number indicating the coarseness of an abrasive file, with lower numbers being coarser. Coarse files remove product quickly, while fine files smooth and finish the surface.

A tool with a fine abrasive surface used to smooth and shine the nail plate or enhancement. It is used after filing to create a even surface and a natural gloss.

A nail enhancement that adds length to the natural nail using forms, tips, or sculpting techniques. It requires proper preparation and a well-fitted form or tip to look natural and stay secure.

A temporary guide placed under the free edge to shape and support a sculpted nail extension. It is removed after the product sets and helps create a consistent curve.

A pre-shaped plastic piece attached to the free edge to extend nail length. It is blended into the natural nail and covered with product for a seamless finish.

A gel polish or enhancement product designed to be removed by soaking in acetone. It is gentler on the natural nail than filing off and requires proper soaking time.

A strong solvent used to remove nail polish, soak-off gel, and acrylic products. It is flammable, dries the skin, and must be used in a ventilated area.

A pre-service conversation to assess the client's nail condition, preferences, and any contraindications. It documents the service plan and helps the technician choose safe products and techniques.

A small application of a product on the skin to check for an allergic reaction before a full service. It is especially important for clients with sensitive skin or known allergies.

An immune response to a substance, causing redness, itching, swelling, or blistering. It can develop with repeated exposure to nail products and requires stopping the service and referral.