Crosslinking of polyisoprene by <a href="https://en.wikipedia.org/wiki/vulcanization" class="extiw" title="w:vulcanization">vulcanization</a>.
<a href="https://en.wikipedia.org/wiki/User:Firey_Deity" class="extiw" title="wikipedia:User:Firey Deity">Firey Deity</a> at <a href="https://en.wikipedia.org/wiki/" class="extiw" title="wikipedia:">English Wikipedia</a>
based on <a href="//commons.wikimedia.org/wiki/File:Vulcanisation.GIF" title="File:Vulcanisation.GIF">File:Vulcanisation.GIF</a>