gǔ / shū / zhōng / jì / zǎi / huǒ / huàn / bù / yù / huǒ / bù / rán / huī / gòu / fǎn / ér / huì / tuō / luò

古书中记载，火浣布遇火不燃，灰垢反而会脱落。

Ancient books record that 火浣布 did not burn when exposed to fire, while ash and dirt fell away.