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Is a cut glass edge not sharp? It was hard to watch him run his finger along the edge like that.

• Natsu 11y ago
  That depends on whether it has been seamed or has edgework. It's incredibly sharp if nothing has been done to it, enough so that merely touching glass edges can cause cuts. Glass is normally seamed before tempering, but that doesn't leave it perfectly smooth either. I've gotten glass splinters from it, along with finding edges that didn't get seamed well, though most sharp edges will break in the tempering furnace (this is why you seam glass prior to tempering). Glass splinters are as horrible as you might imagine and can take weeks to work themselves out, as well as being ridiculously hard to see. So yeah, I don't recommend the practice if you're not sure, but it may be okay for glass that has had edgework done as this glass gets polished smooth, whereas tempered glass is probably okay, but not always safe. EDIT: Looks like it's blown glass. No, that's not very safe.
  • DHJSH 11y ago
    I expected his finger to be bleeding after he picked it up. I'm wondering if it's just a property of the diamond saw, or he likes to live dangerously.
    • DannyBee 11y ago
      Having a cut a ton of stuff with diamond saws, the edge they leave is very abraded, and rarely sharp. This is not surprising, since it's basically like cutting it with 60-180 grit sandpaper
      • Natsu 11y ago
        You're probably right that the edge isn't so sharp, though I note that his finger was higher above it than it looked, but I wouldn't underestimate glass splinters. Those really suck.