DC Cosmetology study guide
DC Cosmetology · Work through your exam, one topic at a time.
This independent study page provides practice for DC Cosmetology. Its editorial learning areas include Hair services and styling; Skin and nail services; Infection control and safety; Scientific foundations; DC licensing and professional scope; Salon management and professional conduct. The DC Cosmetology study guide has 6 sections and about 2,626 words.
01Cleaning, disinfection and safe workflow
Cleaning uses soap or detergent and water to remove visible dirt and debris; it does not substitute for a validated disinfection step. Disinfection uses an EPA-registered hospital-grade chemical to destroy most bacteria, fungi, and viruses on nonporous surfaces.
441 words, about 2 min02Hair design and chemical-service decisions
Reference points guide consistent sectioning: the apex (highest point of the head), parietal ridge , occipital bone , four corners , and nape . Cutting lines are horizontal, vertical, or diagonal; sectioning follows those lines to keep lengths balanced.
448 words, about 2 min03Skin and nail analysis and service limits
Every facial begins with skin analysis : observe pore size, oiliness, texture, and sensitivity, and ask about allergies, medications, and recent cosmetic procedures. Basic skin types are normal, dry, oily, and combination ; conditions such as dehydration, sensitivity, and acne are layered on top.
407 words, about 2 min04Hair and skin science with product chemistry
The hair shaft has three layers: the cuticle (outer overlapping scales), the cortex (the thick middle layer holding melanin, where chemical and physical changes occur), and the medulla (the innermost core, sometimes absent in fine hair). The root sits in the follicle ; its bulb covers the papilla , which supplies blood and nutrients.
432 words, about 2 min05Salon management and professional decisions
Common ownership forms are sole proprietorship (one owner, unlimited liability), partnership , corporation (including S-corporation), and limited liability company . Compensation models include commission , salary , hourly , and booth rental , where the stylist rents space, sets their own prices, but the rental label alone does not determine worker classification or tax responsibilities.
427 words, about 2 min06DC cosmetologist licensing: verified foundations
District of Columbia cosmetology preparation requires separating technical service knowledge from the local rules governing permission to practise. The Department of Licensing and Consumer Protection publishes the Board of Barber and Cosmetology licensing information.
471 words, about 2 min