noun
flame-retardant treatment; fireproofing
Refers to a process or treatment that makes materials resistant to fire, often used in textiles, building materials, and industrial products. Not absolute fireproofing but reduced flammability.
このカーテンには難燃加工が施されています。
These curtains have been treated with a flame-retardant finish.
建築基準法で、カーペット
Building standards require carpets to undergo flame-retardant treatment.