Silk in 19: Pébrine

Scores compare Silk with the rest of the atlas on strength, heat, fire behaviour, insulation, workability and circularity. They are editorial, not certificates. Seven chapters follow. Fire and insulation claims name test families (Euroclass, ASTM E84, ISO 5660, KS F) rather than inventing a single safety number.

Silk (fibroin + sericin) is a family of grades whose density ~1.34 g/cm³, heat band degrades; no thermoplastic melt, and fire letter combustible protein. Silk is sold as grades, not as a single substance. Chemistry fibroin + sericin, density ~1.34 g/cm³, heat band degrades; no thermoplastic melt.

This atlas treats Silk as a system: mill route, coatings, tests and the cavity it sits in. Conductivity note: low. Insulation score 34/100 is relative to 32 entries — metals lose, VIPs and aerogels win. Fire letter in editorial use: combustible protein. Do not equate A1 with “safe in a blaze” or E with “illegal”. Assemblies decide.