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What are some things you can/should cheap out on?
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I mean it's an incredibly difficult job to refine the chemicals enough to produce a usable product. There's a finite number of instalations which can actually pull off the delicate chemistry. The materials to make it are fairly common enough; essentially just SiO2,Al2O3, Na2O, and K2O, but it's much easier to obtain it from the hardware store. I'm definitely not suggesting you attempt to make your own clear glass.