Me ka hoʻonui ʻana i ka nānā ʻana i ka palekana o ke ahi a me ka ʻike kaiapuni, ua puka mai nā fibers rayon flame-retardant (viscose fibers), ʻoi loa i ka ʻoihana lole a me nā lole. ʻO ka hoʻohana ʻana i nā fiber rayon pale ahi e hoʻonui a laha loa. ʻAʻole hiki iā ia ke hoʻomaikaʻi wale i ka hana palekana o nā huahana, akā hoʻokō pū i nā pono hōʻoluʻolu o nā mea kūʻai. Hoʻokaʻawale nui ʻia nā mea pale ahi no FR rayon fibers i loko o ka silicon a me ka phosphorus series. Loaʻa i nā mea hoʻopaʻa ahi ʻo Silicon series i nā hopena pale ahi ma o ka hoʻohui ʻana i ka siloxane i nā fila rayon e hana i nā kristal silicate. ʻO kā lākou mau mea maikaʻi ʻo ia ka launa ʻana i ke kaiapuni, nontoxicity, a me ke kūpaʻa wela maikaʻi, i hoʻohana mau ʻia i nā huahana pale kiʻekiʻe. Hoʻohana ʻia nā mea hoʻopaʻa ahi e pili ana i ka phosphorus e hoʻopau i ka hoʻolaha ʻana o ka lapalapa ma o ka hoʻohui ʻana i nā pūhui organik i hoʻokumu ʻia i ka phosphorus i nā fibers rayon a me ka hoʻohana ʻana i ka hopena oxidation o ka phosphorus. Loaʻa iā lākou nā pōmaikaʻi o ke kumu kūʻai haʻahaʻa, ka maikaʻi o ka lapalapa ahi kiʻekiʻe, a me ke aloha o ke kaiapuni, a hoʻohana mau ʻia i ka hana lole lole ʻole.