Clean room interior finish requires monolithic, impervious, non-particle shedding, chemical resistant material. Sandwiched composite materials are used for this purpose.
Pass box is a prominent part of a clean room whose primary and only work is to pass material from one site to another without raising contamination concern and if any particulate matter presents on the material surface, it swipes away during the operation. The door is featured with an interlocking mechanism, so when one side of the door is open the other side remains closed. Food, pharmaceuticals, microbiology labs mainly use this as a primary system in a clean room.
Dynamic pass box is fitted between a clean and non-cleanroom whereas a static pass box is fitted between two clean rooms.