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<blockquote data-quote="user 22230" data-source="post: 656728" data-attributes="member: 22230"><p>Trick bit of gear, would go well out my place .................... basically zero residual light. Used to help a bloke make mirrors for them 8 and 10 inch. He used to hand grind them then we would go into RMIT in Melbourne and put them in a bell jar and pump a vacuum in then melt a piece of aluminium I think it was ? Was incredible to watch as it literally exploded inside the bell jar giving a perfect finish <img class="smilie smilie--emoji" loading="lazy" alt="👍" title="Thumbs up :thumbsup:" src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f44d.png" data-shortname=":thumbsup:" /></p></blockquote><p></p>
[QUOTE="user 22230, post: 656728, member: 22230"] Trick bit of gear, would go well out my place .................... basically zero residual light. Used to help a bloke make mirrors for them 8 and 10 inch. He used to hand grind them then we would go into RMIT in Melbourne and put them in a bell jar and pump a vacuum in then melt a piece of aluminium I think it was ? Was incredible to watch as it literally exploded inside the bell jar giving a perfect finish 👍 [/QUOTE]
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