The term fire-retardant as applied to organic (i.e., containing carbon) materials, is intended to refer to reduced fire hazard, as all will burn under certain circumstances.
[1] The result is a comparative test, which provides a measure of the material's resistance to propagating combustion caused by small scale ignition sources.
Fabric flammability is an important textile issue, especially for stage drapery that will be used in a public space such as a school, theatre or special event venue.
[citation needed] The flame retardants work by coating the flammable fabrics with a mineral based barrier, preventing fire from reaching the fibres.
It is recommended that topically treated drapery be re-tested for fire-retardancy on an annual basis and re-treated by a qualified professional as needed.