Show pure rubber pure pare rubber Is a sticky plastic material that Is useless for most of the purposes for which it 1 Is needed it Is a compound of carbon and hydrogen and has the property of being chemically unsaturated that Is capable of combining with a number of chemical reagents to make it elastic and heat stable it Is combined with sulphur it Is only within recent years that successful attempts have been made to combine it with other things the gas chlorine for example combines with it ame readily to tn give a resinous material that Is useful as a base for varnishes with hydrochloric acid a product Is formed that can je elded inko elastic transparent sheets the latest development in tills this line Is ii that of oxygenated rubber the combination of rubber and oxygen Is a soft plastic mass that can be readily molded but which on heating boating sets into a tough hard solid |