Which of the following materials cannot be used for packaging if the item will be sterilized?

Canvas is not suitable for packaging items that will be sterilized primarily because it is a porous material. When sterilizing medical instruments or supplies, it is critical to use packaging that is impermeable to microorganisms to ensure the sterility of the contents upon reaching the end user.

Plastic, paper, and metal all offer different benefits for sterilization processes. Plastic can be rigid and impermeable, serving well during steam or ethylene oxide sterilization. Paper is commonly used in sterilization because it allows for gas penetration while maintaining a barrier against contamination post-sterilization. Metal provides a sturdy option, especially for instruments, as long as it is non-corrosive and appropriate for the specific sterilization method used.

In contrast, the fibers in canvas can provide a pathway for bacteria and contaminants to breach the sterile environment, making it an unsuitable choice for effective sterilization processes.