Ubuhinzi: Imyitozo y'imbororahamwe yerekana ko ibimera bikurura amazi cyane cyane binyuze mu mizi, bikaba bigabanya cyane ku buryo bwo guhinga amazi, bikaba bishobora kugabanya cyane ku buryo bwa spray. {}}} Kurenga 50% byamazi yabo yose {{5} kuva mu myaka ya za 1960, ibihugu byikoranabuhanga byagezweho nka Amerika {{7} . umubare munini w'ipata Paraffin . shusho ya paraffin ikoreshwa cyane kuri:
. Ubuso bwibabi .
.
.
Inganda zimpapuro: Ibyinshi mu mpapuro muburyo bwo gutoranya impapuro ni ukuzuza imyenda yimbere, bituma habaho fibre yimpapuro no guteza imbere isaranganya rimwe mu mbanki ya fibre yimpapuro {{4} izindi nyungu ziyongera kandi zikaba zinyuranye mu bubiko cyangwa Guhangana .}}}} hateguwe paraffini nziza ya plaffin kuri ubu ari umukozi wa hydrophobike kugirango umusaruro wimpapuro zo gucapa hirengeye gucapa .