As a general rule, nothing should be allowed into the cleanroom that is not required for production within the room. However, it is up to the management of the cleanroom to decide what items could cause contamination of the product. Items that should be considered for inclusion in a list of prohibited items are:

• food, drink, sweets and chewing gum
• cans or bottles
• smoking materials
• radios, CD players, Walkmans, cell phones, pagers, etc.
• newspapers, magazines, books and paper handkerchiefs
• pencils and erasers
• wallets, purses and other similar items.