Washington Barber License Practice Exam

The chosen substance, 70% isopropyl alcohol, is widely recognized in the barbering and beauty industries for its disinfecting properties. It is effective against a broad spectrum of microorganisms, including bacteria and viruses, making it a reliable choice for ensuring cleanliness and sanitation in a barber shop environment.

The effectiveness of 70% isopropyl alcohol is attributed not just to its alcohol content, but also to its specific concentration. At this level, alcohol can penetrate cell walls of microorganisms more effectively, leading to better disinfection. Additionally, it evaporates quickly, leaving minimal residue, which is ideal for tools and surfaces commonly used in barbershops.

In contrast, hydrogen peroxide, while a disinfectant, can be less effective on certain surfaces and may not be suitable for all tools due to its oxidative properties, potentially leading to material degradation. Sodium hypochlorite, commonly known as bleach, is another disinfectant, but it requires careful handling and may not be appropriate for all disinfection needs in a barber shop due to its strong corrosiveness and potential skin irritation. Alcohol swabs, while useful for small areas or quick disinfections, do not provide the same level of effectiveness for larger tools or surfaces found in barbersh