Bi ñuy tàmbali gis kawsu, waa sowwu jant ñu ngi wéy di defar jëfandikoo gi . Frederick bu Allemagne def benn peeru boot yu tapis ak kawsu bu tasaaroo ci ether {1} Rubber mën na dindi crayon crayon, kon nit ñi dañu koy def ci kawsu {. Waaye kawsu amna fit buy raye, te dafay gëna yëg tàngoor. Su tàngoor wi di gëna kawe, dina nekk lu nooy te dafay xeeñ bu baax; su tàngoor wi woyofee, dina nekk lu bari te dëgër. Loolu dafay tax produit yi am kawsu amul marse.
Ci ete 1834, Goodyear bi dafa dem ci 1834, ci biir New York, di Rubber Company Indian. Mu jàng ni xeetu kawsu bii dafay sonal liggéeyum kawsu bi yépp, waaye kawsu amna ay màndarga yu baax yu melni elastisite bu kawe, plastisite, dundu gu ndoxe ak isolation,
Goodyear du chimist wala gëstukat { 0}} Ci usin bi, dafay liggéey ni liggéeykat, di faral di def ay mbir yu bari ngir saytu ak kawsu {) Ci 1837, ci Goodyear bi dafa faj fiche de kawsu ak asid nitric, ba noppi am brevet ngir "ci anamu gas gaz" {3} Ci weeru janvier 1839, jàngat bi Goodyear def tooñ sulfur boole ci tàngal ko, ba noppi am substance bu niru ak der { 7}} Materiel bi du decompose ci tàngoor yu gëna kawe, gëna bari ci kawsu elastik. Ginaaw ay coppite yuñ gëna xam, Goodyear bi dafa gëmoon ni macceer bi mu defar du decompose ci tàngoor wi ci suufu point boiling, te xaralay vulcanisation de ca kawsu dafay juddu. la juddu.