How is the CAL 133 test categorized?

The CAL 133 test is categorized as a full-scale test. This classification refers to the method's comprehensive approach to evaluating the flammability characteristics of upholstered furniture. In a full-scale test, the entire unit of furniture, as it would be used in an actual environment, is subjected to rigorous fire testing to determine its combustion properties, smoke generation, and heat release rate. This provides a realistic assessment of how the material will react under actual conditions, making it essential for ensuring safety standards in interior textiles.

The full-scale nature of CAL 133 distinguishes it from small-scale tests, which typically examine only individual components or small samples without reflecting the complexities of a complete furniture piece. The emphasis on testing entire units is pivotal for understanding how different materials interact and behave together in real-life scenarios, reinforcing the necessity of thorough testing protocols in interior design and safety regulations.