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newSchoolWorks.com › VoTechWorks › Health & Personal Services › Cosmetology › Infection Control and Sanitation for Cosmetology › Lesson 7
HLT-COSM32-05 · Lesson 7 · 15 clock hours · practice

Implement Cleaning and Disinfection Workflow: Combs, Brushes, and Metal Tools

Objective. Students will execute the complete two-step clean-then-disinfect workflow for porous and non-porous salon implements, completing each step within state-board time requirements and documenting results on a salon log.

⚠ Pending professional review

This lesson, its worked examples and its practice questions has not yet been verified by a licensed clinician in the field or by a certification or approval body. It is a study draft and may contain errors. Do not use it to make decisions about any patient or medication. Always follow your instructor, your supervising professional, and current official references and regulations.

VoTechWorks program approval and accreditation are still in progress. Credentials are issued only by the certifying bodies named in each program, after their own exams.

Why the Clean-Then-Disinfect Workflow Exists

State cosmetology boards and the EPA require a two-step process before any implement touches another client: clean first, then disinfect. Skipping or reversing these steps is not just a rule violation—it is a public health risk. Organic matter (hair, skin cells, blood, product residue) physically shields pathogens from disinfectant chemistry. A comb dropped into disinfectant solution without pre-cleaning may harbor active microorganisms under a film of debris even after the required contact time. The law exists because the science demands it.

Step 1 — Remove Visible Debris

Before water touches the implement, use a dry paper towel, a comb-cleaning brush, or a pick to remove all loose hair, lint, and product buildup. Discard this debris in a lined waste receptacle. Do not blow debris off with your breath or tap implements on surfaces used for other purposes. This step makes the subsequent wash far more effective.

Step 2 — Wash with Soap and Water

Using dish soap or a detergent approved for salon use and a scrub brush, work the implement under warm running water, scrubbing all surfaces, teeth, bristles, and hinges. Rinse thoroughly until no soap film or visible soil remains. This step is called pre-cleaning and it is mandatory—state board inspectors cite salons specifically for skipping it. After rinsing, pat or air dry the implement before immersion; excess water can alter disinfectant concentration.

Step 3 — Immerse in EPA-Registered Disinfectant

Use an EPA-registered disinfectant labeled for use on salon implements. The EPA registration number must appear on the product label. Quaternary ammonium compounds (quats) are the most common choice in modern salons. Mix the solution according to manufacturer instructions—concentration matters. Too weak: pathogens survive. Too strong: you waste product and may corrode metal tools.

Using tongs (never bare hands), fully immerse the implement so all surfaces are covered. Set a timer for the full contact time listed on the label. Contact time is not a suggestion; it is the minimum time required by laboratory testing to achieve the kill claims on the label. Removing implements early means you cannot confirm disinfection occurred.

Only non-porous items (metal shears, metal clips, non-porous combs) can be fully disinfected by immersion. Natural-bristle brushes and other porous items cannot be reliably disinfected; many state boards prohibit their use on clients for this reason. When in doubt, apply your state board's specific rules.

Step 4 — Remove, Rinse, Dry, and Store

When the timer sounds, remove implements with tongs. Rinse under clean water to remove disinfectant residue (residual quat can irritate skin). Dry completely—moisture promotes rust on metal tools and can support microbial growth. Place disinfected implements in a clean, covered, labeled storage container and do not return them to drawers or open trays where they can be re-contaminated before use.

Porous vs. Non-Porous: Know the Difference

| Implement | Porosity | Can Be Disinfected by Immersion? |

|---|---|---|

| Metal shears | Non-porous | Yes |

| Metal clips | Non-porous | Yes |

| Hard plastic combs | Non-porous | Yes |

| Rubber combs | Check label | Often yes |

| Natural-bristle brushes | Porous | No—discard or follow state rule |

| Nylon-bristle brushes | Semi-porous | Check state rule |

The Salon Sanitation Log

Documentation is a professional and legal responsibility. Every time you process implements, you must record the event. A complete log entry includes:

State board inspectors can request logs during an inspection. An incomplete log is treated the same as a missing log—it suggests the process was not performed. Accurate documentation protects clients and protects your license.

Disinfectant Safety Handling

Why 100% on Critical Steps?

The competency check for this lesson requires 100% on critical safety steps. In a real salon, there is no partial credit for a pathogen. One shortcut on contact time or one skipped pre-clean is one opportunity for disease transmission. Bloodborne pathogens, fungal infections, and bacterial infections have all been linked to improperly sanitized salon implements in documented outbreak investigations. Protecting clients is the foundation of your license and your professional reputation.

Key terms8

Pre-cleaningThe mandatory first step of removing all visible debris and organic soil from an implement using soap and water before disinfection; organic matter prevents disinfectants from reaching pathogens.
EPA-registered disinfectantA disinfectant product that has been reviewed and registered by the US Environmental Protection Agency and bears an EPA registration number on its label, confirming its kill claims have been scientifically validated.
Contact timeThe minimum length of time an implement must remain fully immersed in disinfectant solution for the product to achieve the kill claims stated on its label; removing implements early invalidates the disinfection.
Quaternary ammonium compound (quat)A class of EPA-registered chemical disinfectants widely used in salons for implement immersion; effective against a broad range of bacteria, fungi, and some viruses when used at the correct concentration and contact time.
Non-porousDescribes a surface with no microscopic pores that can trap organic matter or microorganisms; non-porous implements such as metal shears and hard plastic combs can be reliably disinfected by immersion.
PorousDescribes a material with small openings or absorbent fibers (such as natural bristles or wood) that trap debris and microorganisms, making full disinfection by immersion impossible and requiring disposal or special handling per state board rules.
Salon sanitation logA written or digital record documenting each disinfection event, including the date, implements processed, disinfectant product name and EPA registration number, dilution, contact time, and the staff member's initials; required for regulatory inspection.
Safety Data Sheet (SDS)A standardized document required by OSHA that provides information on a chemical product's hazards, safe handling, personal protective equipment requirements, and emergency response procedures.

Worked examples4

1. The label on your quat disinfectant says to mix 1 ounce of concentrate per gallon of water. Your disinfectant container holds 2 quarts of solution. How many ounces of concentrate do you need?
  1. Identify the ratio: 1 oz concentrate per 1 gallon of water.
  2. Convert your container size to gallons: 2 quarts ÷ 4 quarts per gallon = 0.5 gallons.
  3. Multiply: 1 oz × 0.5 = 0.5 oz of concentrate needed.
  4. Add 0.5 oz of concentrate to the container and fill to the 2-quart mark with water.
Answer: 0.5 oz (one-half ounce) of concentrate mixed with enough water to reach 2 quarts total solution.
2. You place a set of combs into disinfectant at 2:07 PM. The label requires a 10-minute contact time. At what time can you remove them?
  1. Note the immersion time: 2:07 PM.
  2. Add the required contact time: 10 minutes.
  3. 2:07 PM + 10 minutes = 2:17 PM.
  4. Set your timer and do not remove the combs before 2:17 PM.
Answer: 2:17 PM. The combs must remain in solution until at least 2:17 PM.
3. Your disinfectant solution looks cloudy and has visible hair floating in it. You have 6 implements left to process. What should you do, and why?
  1. Stop: do not immerse additional implements in the cloudy solution.
  2. Cloudy or visibly contaminated solution has been compromised—organic matter reduces disinfectant effectiveness and the solution can no longer guarantee the kill claims on the label.
  3. Dispose of the old solution according to your salon's SDS procedures and local regulations.
  4. Clean and dry the disinfectant container, prepare a fresh solution at the correct dilution, record the change, and then process the remaining 6 implements in the new solution.
Answer: Discard the contaminated solution, prepare fresh disinfectant at the correct dilution, and process the remaining implements in the new solution. Compromised solution cannot be relied on for disinfection.
4. You need to fill out a salon sanitation log entry. You disinfected 8 combs and 2 pairs of metal shears using Brand X Quat Disinfectant (EPA Reg. No. printed on the label), mixed at the label ratio, with a 10-minute contact time, starting at 3:45 PM on a Tuesday. List every field your log entry must contain.
  1. Date: the Tuesday's date.
  2. Time: immersion start 3:45 PM, end 3:55 PM (or total: 10 minutes).
  3. Implements: 8 combs, 2 pairs metal shears (10 implements total).
  4. Product name: Brand X Quat Disinfectant.
  5. EPA registration number: as printed on the product label.
  6. Dilution ratio: as specified on the label (e.g., 1 oz per gallon).
  7. Contact time: 10 minutes.
  8. Staff initials: your initials.
Answer: A complete log entry includes: date, start and end time (or total contact time), list of implements, product name, EPA registration number, dilution ratio used, contact time achieved, and your initials.

The math in this lesson2

Learners convert 2 quarts to 0.5 gallon to mix 0.5 oz of quat concentrate and time a 10-minute contact.
6.RP.3N-Q.1
Brush up in the math halls at newSchoolWorks.com:
In class: Instructor demonstration of full workflow: remove visible debris, wash with soap and water, rinse, dry, fully immerse in EPA-registered disinfectant for full contact time, remove, rinse, dry, and store in clean covered container—narrating the state board rule rationale at each step · Students process a set of 10 soiled implements (combs, brushes, metal shears—intentionally contaminated with hair, product residue, and a simulated organic soil) through the full workflow while instructor times and observes · Students complete a mock salon sanitation log entry for the implements processed, including product name, EPA registration number, dilution, time in solution, and their initials; peer review of log entries using an answer key
Materials: Combs, brushes, metal clips, shears (training tools), dish soap, scrub brushes, quat disinfectant solution, tongs, covered disinfectant container, clean covered storage container, salon sanitation log forms, timer
Check: Instructor checklist with 12 procedural steps; student must complete all 12 correctly, achieve confirmed disinfectant concentration, and have an accurately completed log entry; pass mark is 100% of critical safety steps (no shortcuts on contact time or pre-cleaning) and 10 of 12 total steps

Practice check8

Answer each question, then check it. Nothing is recorded; this is your own practice.

Infection Control
1. Why must an implement be pre-cleaned with soap and water BEFORE being placed in disinfectant solution?
Infection Control
2. Which information is REQUIRED on a salon sanitation log entry?
Infection Control
3. A cosmetologist removes combs from disinfectant solution two minutes before the contact time listed on the label is complete. What is the primary concern?
Infection Control
4. Which of the following implements CANNOT be reliably disinfected by immersion in a liquid disinfectant?
Infection Control
5. During a station inspection, the disinfectant solution in the covered container appears cloudy. The correct action is to:
Chemical Safety / Infection Control
6. When handling quaternary ammonium disinfectant concentrate, a cosmetology student should:
Infection Control
7. A student pre-cleans and disinfects a set of metal shears correctly but stores them in an open, uncovered tray on the styling station. What problem does this create?
Infection Control / Professional Standards
8. A cosmetology student's competency check for implement disinfection requires 100% completion of all critical safety steps. The student completes 11 of 12 total steps correctly but skips the pre-cleaning step. What is the result?
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