https://www.frit-happens.co.uk/w/index.php?action=history&feed=atom&title=Vermiculite 2026-07-13T08:16:25Z Revision history for this page on the wiki MediaWiki 1.45.1 https://www.frit-happens.co.uk/w/index.php?title=Vermiculite&diff=264&oldid=prev 2008-11-13T22:19:45Z

<p>New page: Vermiculite is a natural mineral. It expands when exposed to heat and is used frequently in <a href="/wiki/Lampworking" title="Lampworking">lampworking</a>. Many lampworkers use vermiculite if they <a href="/wiki/Batch_anneal" title="Batch anneal">batch anneal</a> their beads. Used in...</p> <p><b>New page</b></p><div>Vermiculite is a natural mineral. It expands when exposed to heat and is used frequently in [[lampworking]].<br /> <br /> Many lampworkers use vermiculite if they [[batch anneal]] their beads. Used in a powdered form, it slows down the cooling of the beads and makes them cool more evenly. This reduces the internal stresses and reduces the tendency to crack.<br /> <br /> Many people increase the time taken for a bead to cool in the vermiculite by placing it in a slow cooker on high whilst they are working and turning it off when the last bead is plunged into the substance. This can also be done on a saucepan on the hob.<br /> <br /> Vermiculite does NOT [[anneal]] the beads, it is simply a temporary measure that stops them cracking until you can [[anneal]] them properly.</div>

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