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  • ascii commented on Duplo for Daddies's instructable How to Cut Glass
    How to Cut Glass

    There's a lot of mythology surrounding glass, mostly based on the idea that it's in some way liquid and flows. It's actually an amorphous solid, and does not. When I first started cutting glass I was told that you had less than a minute to make the cut after scoring it, or less than thirty seconds, or less than an hour. I scored a scrap piece several times and put it aside for a week. Then I forgot it, and a month later when I found it I snapped it in each place with no trouble. I was also told that glass more than a year old can't be cut, but the stuff I was using was easily a decade old. I live in a house that's over a century old, and still has some original glass. I don't have the equipment necessary to accurately measure, but I can see no sign that it's thicker at the bottom. …

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    There's a lot of mythology surrounding glass, mostly based on the idea that it's in some way liquid and flows. It's actually an amorphous solid, and does not. When I first started cutting glass I was told that you had less than a minute to make the cut after scoring it, or less than thirty seconds, or less than an hour. I scored a scrap piece several times and put it aside for a week. Then I forgot it, and a month later when I found it I snapped it in each place with no trouble. I was also told that glass more than a year old can't be cut, but the stuff I was using was easily a decade old. I live in a house that's over a century old, and still has some original glass. I don't have the equipment necessary to accurately measure, but I can see no sign that it's thicker at the bottom. I'm told that the people running cathedrals used to take the windows out every few centuries and put them upside down for the same time. Leaving aside that the frames are cut stone and weight several tons, that the cranes that could do this haven't been found and that the whole idea is ludicrous, glass doesn't flow, and an old window is exactly as it was made. If this wasn't so there's be at least one picture of glass which had slumped and torn open, and there isn't. There's glass from Egyptian tombs made long before the pyramids, and it's not little puddles, or even distorted. I've seen a picture of carefully made glass rods which were bent by thirty degrees - you can do this if you polish the surface so there's nowhere a crack can start - and left that way for forty years. When released they sprang back, unbent. My son just asked, "If it flows after a few seconds, does that mean you can hold the edges together and let it melt back into a single sheet?" Sadly, you can't. I don't like to nitpick, but this weird legend scares off novices, and there's no reason. Aside from that, this is an excellent instructable.

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  • ascii's instructable A Cheap and Easy Four Poster Bed.'s weekly stats:
    • A Cheap and Easy Four Poster Bed.
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