Glass for the heated bed.
I’m building a Prusa i3 with an 8x8 inch build area from a kit. The one thing that isn’t included is the glass for the heated bed. I went to Home Depot last night and they said they no longer cut glass for people because of safety concerns. (Ironic since they sell double sided axes, hatchets, and nail guns). He wasn’t sure, but he thought Lowes no longer cut glass to size either.
So today I stopped at a tiny glass shop in town about getting an 8x8 inch piece of glass and course the first thing he asked was well what kind of glass? He asked if any heat was involved and I said yes so he said then you need tempered glass, regular glass would crack with heat. He said the tempered glass was 1/4 inch thick. I asked about window glass. He said window glass is 1/16th inch thick and would crack under heat even easier.
So my question is what kind and thickness of glass to get? The other question is, do I get 200mm x 200mm in size or 8 x 8 inches in size? It looks like the print area is 200x200mm but it would be useful to use an 8x8 inch piece to have room to put the binder clips. On my heated bed it looks like an 8x8 inch piece might do a little more than touch the edge of the four corner screws. I can ask him to round off the corners. But if I didn’t do that would an 8x8 inch piece actually fit flat without riding up on the edges of the corner screws?