What is the primary reason for not using porous items that have been contaminated with blood?

The primary reason for not using porous items that have been contaminated with blood is that they cannot be disinfected effectively. Porous materials, such as soft fabrics, wood, or other absorbent surfaces, can trap and hold pathogens and blood, making it impossible to completely sterilize them. This means that even after cleaning attempts, these items can still pose a risk of transmission of infectious diseases. In a cosmetology setting, where maintaining a safe and sanitary environment is critical for both clients and practitioners, it is essential to avoid the use of such porous materials once they have been exposed to blood or other potentially infectious substances.

On the other hand, while allergic reactions might be a concern with some materials, it is not the primary reason for avoiding porous items in this context. The cost of replacement may also be a factor, but safety and health considerations take precedence over financial aspects. Lastly, the durability of porous items over time is less relevant compared to their inability to be properly disinfected after contamination.