Translations:Ebanite/2/en
Versione del 1 giu 2019 alle 21:42 di Piccardi (discussione | contributi) (Creata pagina con "The <includeonly>hard rubber</includeonly><noinclude>hard rubber</noinclude> (also called ''ebonite'' or ''vulcanite'' in some old advertisements) is a <includeonly>materi...")
The hard rubber (also called ebonite or vulcanite in some old advertisements) is a material invented[1] in 1843 and produced by a rubber vulcanization process in which the natural rubber is mixed with a variable percentage (from 20 to 50%) of sulfur, and hardened by keeping it at high temperature for a prolonged time (a few hours around 150°C). Hard rubber is generally produced in sheets, bars or slabs, which must be subsequently processed; in fact, it is not possible to make it with a mould.