https://www.avient.com/sites/default/files/2021-12/Chemically Resistant Materials Whitepaper.pdf
For visual observation, if the sample survived the strain tool and chemical exposure without brittle failure then a positive mark was granted.
In addition to surviving the treatment period, if the sample did not exhibit signs of significant crazing or cracking then an additional positive mark was granted.
Regarding tensile properties, three additional categories granted positive marks: 1.
https://www.avient.com/sites/default/files/2024-02/CAI W_C Colorants and Additives for TPU Product Bulletin _A4.pdf
The inclusion of these additives can help a cable to pass flame resistance tests, even if the resin originally used is not flame retardant • Cesa™ Light Additives: UV light stabilizers that improve weather resistance and provide long term protection against weather degradation • Semi-conductive TPU formulations to enhance cable performance • Cesa™ Laser Additives: Includes laser-marking additives for durable cable marking.