What type of razor is NOT appropriate for cutting hair?

The type of razor that is not appropriate for cutting hair is a box cutter. A box cutter is designed for utility purposes, typically used for cutting through boxes and packaging materials. It features a retractable blade that is not suitable for hair cutting due to its design and intended purpose.

In contrast, straight razors, safety razors, and thinning razors are specifically designed for grooming and styling hair. Straight razors offer a precise cut and are often used in barbering for clean lines. Safety razors provide a safer option for home use with a guard to protect the user from the blade. Thinning razors have teeth that allow for blending and removing bulk without shortening hair length significantly. Each of these options has a functional design tailored for hair cutting, making them appropriate tools in the cosmetology field.