1. Vulkenisasen bilong raba
Goodyear, wan pua man blong Amerika, i bin gat strong tingting blong jenisim raba we i raw i kam wan gudfala samting we i bin elastik mo strong blong raba we i bin raba blong bitim 30 yia, be i bin spendem laef blong hem long fasin blong stap pua{{2} Stori ia long homtaon blong Goodyear: yu wantem faenem Goodyear? Lukim, em i stap! He wore a rubber cap, a rubber lined windbreaker, a rubber vest underneath and rubber pants underneath. Rubber boots and a rubber purse-not a cent in it. Goodyear gels were mixed with magnesium oxide, boiled in lime water, boiled in nitric acid, sprinkled with sulfur on the surface of gels, dried in the sun, and so long. Bihain long olgeta wok painimaut bilong em i no kamap gut, em i putim ol liklik hap bilong glu, paura salfa, na turpentin i go insait long wanpela krusibol na kukim long stov. Aksiden, wanpela hap glu i bin kamap long kaul na pundaun long paia, paia tasol i no stik i bin kalap long paia, i paia tasol i no stiki{8}} i no gat stik i bin kalap long paia, na em i paia tasol i no stiki{8}} i no gat stik i bin kalap long paia, na em i paia tasol i no stiki{8}} i no gat stik bilong raba, em i paia tasol i no stiki. i no gat stik bilong raba, em i paia tasol em i no stikim. i no gat stik bilong raba, em i paia tasol em i no stikim. i no gat stik bilong raba, em i paia tasol em i no stikim. i no gat stik bilong en, em i paia tasol em i no stikim em. em i bin samting em i bin wetim long olgeta de.
In today's rubber factories, this is called the vulcanization process. Since then, raw rubber has been transformed into a useful material. Goodyear's vulcanization process was later figured out by chemists: sulfur atoms built "Bridges" between large molecular chains of raw rubber, as if the springs of a sofa were connected to each other with twine and wire, elastic but not loose.
2. Hau dosis blak na waitpela bilong raba i senis?
Rubber mixed with carbon black can be hardened and wear resistant. Sole, the black color of rubber tire is caused by carbon black. White rubber without carbon black, add white calcium carbonate, qin white powder filler. Eraser pencil words can only be made of white rubber, can not erase the pencil words but left a black mark. So the black and white of rubber is not a random choice of kala. Wantaim wok bilong sosaiti, long nau, sapos yu putim ol samting bilong raba inap long mekim ol prodak i luk narapela narapela kala, we inap long inapim ol nid bilong ol manmeri bilong nau long ol samting bilong raba bilong ol raba bilong.