CRABTREE OBSIDIAN SCALPEL HOW TO
Crabtree figured out how to make them back in the Sixties and you can learn how if you can track down his relevant publications, which are listed at the bottom of this post.) They were invented 2,500 years ago by Mesoamericans and in another undetermined period by the pre-French. The best examples of these blades are very rare, but can be up to 12 inches long and only 30 angstroms ( Å) thick on the edge, compared to a Schick razor’s 300 Å. But there is a process to make a perfectly chipless blade using a “single-fracture” technique. You probably have even seen obsidian weapons and artwork with the chipped-edge designs popular in history books. You may have heard of these tiny scalpels, much sharper than steel and with some properties that make them more useful than diamonds. The sharpest blades in the world that actually come to macro-scale use are obsidian blades (volcanic glass) and have been used in surgery. If the point were one atom wide and two atoms long, I suppose it would be a chisel, which is a blade. But it’s only strong enough to do nano-scale work, and a needle is not a blade. The sharpest object ever made by man is a one-atom tungsten needle made by Canada’s National Institute for Nanotechnology. These blades are typically the edges of diamonds, and are used in electron detection and nano-scale research.
That may sound implausible and pretty crazy, but there real examples exist. The sharpest blades in the world are literally one molecule or even one atom thin on the edge. It’s Thorsday, so here is a post from Bernhard Hamaker on the sharpest blades in the world and on the farm:
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