Comments on: I did not know that http://blog.archenemy.org/2006/09/22/i-did-not-know-that-2/ rum, bloggery & the lash Wed, 03 Dec 2008 00:16:22 +0000 http://wordpress.org/?v=2.6.3 By: ngrvnd http://blog.archenemy.org/2006/09/22/i-did-not-know-that-2/#comment-737 ngrvnd Wed, 27 Sep 2006 16:45:51 +0000 http://blog.archenemy.org/?p=753#comment-737 Aha, yes, this makes sense. They used to use very hard (stearine) wax for this when I was a kid and had my own microtome stage and blade, but I'm sure they have graduated to better things now. Thanks for the link to the supply place, I may buy some stuff from them. Aha, yes, this makes sense. They used to use very hard (stearine) wax for this when I was a kid and had my own microtome stage and blade, but I’m sure they have graduated to better things now. Thanks for the link to the supply place, I may buy some stuff from them.

]]> By: jmd http://blog.archenemy.org/2006/09/22/i-did-not-know-that-2/#comment-738 jmd Tue, 26 Sep 2006 18:27:20 +0000 http://blog.archenemy.org/?p=753#comment-738 Pella sells the blades for slicing samples. Maybe the samples are stabilized in epoxy? Pella sells the blades for slicing samples. Maybe the samples are stabilized in epoxy?

]]> By: ngvrnd http://blog.archenemy.org/2006/09/22/i-did-not-know-that-2/#comment-739 ngvrnd Mon, 25 Sep 2006 01:05:40 +0000 http://blog.archenemy.org/?p=753#comment-739 Why do you slice epoxy? Why do you slice epoxy?

]]> By: TJIC http://blog.archenemy.org/2006/09/22/i-did-not-know-that-2/#comment-740 TJIC Sat, 23 Sep 2006 01:20:28 +0000 http://blog.archenemy.org/?p=753#comment-740 Actually, Teflon coated bullets were designed not to protect gun barrels, but to pierce windshields. Teflon at certain speeds is slippery, but at other speeds - and against certain materials - is "sticky". When regular bullets impact a heavilly sloped windshield, they can deflect quite easilly. Cops had a problem shooting at people who were trying to run them down (often failed to penetrate the glass), so they contracted to have some special bullets made up. The result: teflon bullets. Barrels don't need much protection from bullets - barrels are made out of steel, and bullets are jacketted in copper, usually, which is much much softer than steel. For a benchrest shooter, the very slight copper build up over time is important (which is why there are special formulations of gun cleaning liquids that cut through copper), but for most people, even people who shoot a lot, a barrel will last a long long time with pretty decent accuracy the whole time. Actually, Teflon coated bullets were designed not to protect gun barrels, but to pierce windshields. Teflon at certain speeds is slippery, but at other speeds - and against certain materials - is “sticky”. When regular bullets impact a heavilly sloped windshield, they can deflect quite easilly. Cops had a problem shooting at people who were trying to run them down (often failed to penetrate the glass), so they contracted to have some special bullets made up. The result: teflon bullets.

Barrels don’t need much protection from bullets - barrels are made out of steel, and bullets are jacketted in copper, usually, which is much much softer than steel. For a benchrest shooter, the very slight copper build up over time is important (which is why there are special formulations of gun cleaning liquids that cut through copper), but for most people, even people who shoot a lot, a barrel will last a long long time with pretty decent accuracy the whole time.

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