25 BESS is twice as sharp as a Gillette razor. Obsidian is used by some surgeons for scalpel blades, as well-crafted obsidian blades have a cutting edge many times sharper than high-quality steel surgical scalpels, the cutting edge of the blade being only about 3 nanometers thick. In reality, knives scoring under 50 BESS split hair.ДЄlso not possible to make the edge falsely score under 30 BESS in repeated sharpness tests, no matter how you test - Peter J Bald, our repeated winner in the Adelaide and Sydney knife shows scored the same 25 BESS, the Adelaide testing done by Michael (Australian Knife Magazine) on his sharpness tester, and Sydney done by me on Knife Grinders' sharpness tester. For an edge to score that good it must at a minimum slice a hanging hair.

Owners of the BESS sharpness tester know very well that no trick can make the tester show 25 or 40 BESS for a knife that hardly shaves your forearm. obsidian, it breaks in such a way that the edge can be a few atoms thick. my and Michael's (KnifeKnut) sharpness testing may not be the same, but scores are close, as we saw in the Sydney show.ДЄs to our Australian winning scores, they are true ultra-sharp knives. In fact as seen under a microscope, an obsidian scalpel will cut cells neatly. It's a pity we cannot see a video them testing, the dramatic difference in scores between the UK and us might be due to some weird testing manner at their end.Д®.g.

The UK used the same sharpness tester PT50A this and last year, the same person doing the tests this and last year, and the UK last year results were in the same range around 200-300 BESS, the last year winner scored 153 BESS. I do not oppose Australia with UK, it is just a fun way to talk about achievements in sharpening - that's what any competition is about, isn't it?

Obsidian scalpel atom thick