What does Class I rating in flammability tests signify?

A Class I rating in flammability tests indicates that the fabric has high flame resistance. This classification suggests that the material can withstand exposure to flames more effectively than fabrics with lower ratings, such as Class II or Class III, which denote varying degrees of flammability. Fabrics rated as Class I are typically used in applications where fire safety is a significant concern, such as in upholstery for public spaces or in drapery. This rating helps designers and consumers identify materials that provide better protection against fire hazards, making it a critical consideration for interior textiles aimed at safety and compliance with building codes.