NIC Master Barber Theory study guide
NIC Master Barber Theory · Work through your exam, one topic at a time.
The NIC Master Barber Theory Examination is a written, multiple-choice test used by state barbering boards to judge whether an applicant has the book knowledge required for licensure as a master barber. It is intended for candidates who have completed or are finishing an approved barbering program and are applying for a license in a state that has adopted the NIC examination. The NIC Master Barber Theory study guide has 10 sections and about 3,101 words.
01Sanitation, Disinfection, and Infection Control
This domain tests how you stop disease from spreading in the shop: the difference between cleaning, disinfection, and sterilization, how to handle blood and contagious conditions, and which tools may be reused. Cleaning removes visible debris with soap and water; disinfection kills most pathogens on nonporous surfaces; sterilization destroys all microbial life, including spores.
332 words, about 2 min02Hair and Scalp Care, Shampooing, and Treatments
This domain covers hair analysis, shampoo selection, scalp massage, and treatment services, plus knowing which scalp conditions you may serve and which you must refer. Analyze hair before service: texture (fine, medium, coarse), density, porosity (how quickly hair absorbs water), and elasticity (a wet strand stretches and returns).
318 words, about 2 min03Haircutting, Clipper Work, and Tapering
This domain tests sectioning, elevation, blade work, and tapering: the geometry that keeps a cut balanced and the tool control that keeps it clean. Section with clean partings, usually four or five sections, and take uniform, thin subsections.
325 words, about 2 min04Shaving, Beard Design, and Facial Hair Services
This domain covers safety razor shaving, the order of a professional shave, and shaping beards and mustaches to the client's face. Prepare: drape, cleanse, apply lather, and soften with a hot towel.
321 words, about 2 min05Hair Coloring and Lightening
This domain tests the level system, developer choice, patch and strand testing, and application order for tints and lighteners. The level system runs from 1 (black) to 10 (lightest blonde).
307 words, about 2 min06Chemical Texture Services and Relaxing
This domain covers relaxers and permanent waves: the chemistry of breaking and rebuilding disulfide bonds, product selection, and the neutralizing step. Relaxers: sodium hydroxide (lye, pH about 12-13), no-lye (guanidine or calcium hydroxide, pH about 9-10), and thio relaxers (ammonium thioglycolate, pH about 9-10).
306 words, about 2 min07Anatomy, Physiology, and Histology of Hair, Skin, and Nails
This domain tests the structures you work on and the systems that support them: hair layers and growth cycles, skin layers and glands, and nail anatomy. Hair has three layers: the cuticle (outer overlapping scales), cortex (middle, holds melanin and gives strength and elasticity), and medulla (central core, often absent in fine hair).
314 words, about 2 min08Chemistry, Product Knowledge, and Implements/Tools
This domain tests pH, the types of mixtures you handle, and how to choose and maintain tools. pH runs 0-14 and is logarithmic: each whole step is a tenfold change.
283 words, about 1 min09State Barbering Law, Rules, and Regulations
This domain tests the regulatory frame around barbering: licensing, sanitation requirements, scope of practice, and recordkeeping. Specific numbers vary by state, so learn the principles and check your state board's rules.
293 words, about 1 min10Professional Image, Ethics, Business, and Shop Management
This domain tests the conduct and business side of barbering: consultation, ethics, pricing, marketing, and running a safe, profitable shop. Consult before every service: assess hair and scalp, confirm the goal, explain aftercare, and document.
302 words, about 2 min