Which of the following are recognized methods of sterilization?

• A. High-pressure steam or dry heat autoclaves, and some chemicals
• B. Ultraviolet exposure only
• C. Soaking in plain water
• D. Wiping with a wet cloth

Answer: (A)

Sterilization means destroying all forms of microbial life, including spores, on instruments. The most widely recognized methods in salon safety are high-pressure steam sterilization in an autoclave and dry heat sterilization. Steam under pressure uses saturated steam at high temperatures to penetrate and completely kill organisms on the tools, and it’s trusted because it reliably reaches and eliminates even tough spores when run with validated cycles. Dry heat sterilization achieves sterilization by exposing items to hot air at high temperatures for longer periods, which is effective for heat-tolerant tools that might be damaged by moisture.

Some chemicals can also achieve sterilization, but only when they’re used exactly as approved—correct concentration, required contact time, and compatible instruments. That’s why this option is included as a recognized method, though it relies on strict adherence to manufacturer instructions and regulatory guidelines.

Ultraviolet exposure, by contrast, is mainly a surface disinfectant with limited penetration and is not reliable for sterilizing all instrument types. Soaking in plain water or wiping with a wet cloth are cleaning steps that remove debris and reduce organisms but do not achieve sterilization.