What is the requirement for curtains or drapes used in laboratories?

In laboratory settings, especially where flammable gases and materials are utilized, the requirement for curtains or drapes is that they should be both inherently flame resistant and flame proof. Inherently flame resistant materials are those that don't burn easily and have been manufactured to resist ignition and fire spread without the need for any chemical treatment. Flame proof materials, on the other hand, are specifically treated to resist combustion and help prevent flames from penetrating through.

Combining both inherent flame resistance and flame-proof characteristics provides an extra layer of safety in a potentially hazardous environment. This ensures that if a fire or spark occurs, the curtains or drapes will act as a barrier, minimizing the risk of flames spreading and thereby enhancing overall fire safety in the laboratory. The inclusion of both features in materials used in laboratories underscores the importance of stringent safety standards, particularly in areas where the risk of ignition is higher.