I appreciate your feedback, thank you. Vadim

Philippe, under 100 BESS the pre-tensioned clips and BESS-certified test line score the same. E.g. Mike Brubacher scores on a new Gillette razor 50 BESS and Feather razor 30 BESS using the test line - and the same they score using clips in testing done by Chase Anderson at Refined Shave www.refinedshave.com/razor-blade-sharpness-testing My tests of knife edges under 100 BESS show negligible difference of 1-3 BESS between the line and the clips. I start seeing a tangible difference between them on edges that score over 120 BESS. The pre-tensioned clips are better for documenting events in a video, because rule out falsification of the sharpness score by over-tensioning the test line.

Glad it was helpful!

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I plan to buy his book due to your comment. Thanks!

Cool , I've read it a couple times and picked up more each time . It is truly a wealth of factual information that is scientifically tried and proven . My utmost respect to him 👍

Thank you Roger. Since 2018 we have had 5 revisions of the book, and by the 5th edition it has doubled in volume. Everyone who bought earlier editions, please email for a free download of the latest revision of the book, in English and German. The latest revision of the book has © 2018-2021 on the cover.

Arthur, no knife can last through the day load without steeling - this is a given. You can read first-hand feedback by a boning butcher on our Victorinox 55 BESS knives in this our research page 8: knifegrinders.com.au/SET/Effect_of_felt_and_paper_wheel_on_edge_retention.pdf See also info on the trial at a meat plant on our website knifegrinders.com.au/17ProprietaryEdge.htm

@@knifegrindersaustralia5158 Thank you for your information. I learned something today...

You seem to underestimate that the 61BESS edge in the test is that of the Gillette razor or very near. If you can put such an edge on your knife, try a similar test with 2KG load via a hardened steel bar, and see how well your edge retains the sharpness. This will change your opinion of what you saw in this my video. Hardened steel is far not the same as the soft copper in the roller.

@@knifegrindersaustralia5158 Hi, I don't have any critique against that edge or your skills. I'm just saying that the test seems to have a lot less consistency that the roller test. This knife seems to have a "sweep", so how large is the contact patch between the knife and the hardened bar? Hard to tell. Does it matter? Of course, the deformation should be affected by both pressure exerted and hardness of the material. Did you actually mange to measure where the bar was contacting the edge? Impossible to tell from the video, perhaps you did, perhaps not. The cooper roller wheel eliminates any doubt that the edge has not been affected at the point of measurement in my mind. It would be interesting to see if you find any difference between a copper and hardened steel roller at the same weights and diameters. Best regards Hampus

I understand what you say, what perplexed me is that you are saying nothing different from what this video itself says at 17:30 We did comparison of the copper and steel roller in the Wire Edge Detector experiments knifegrinders.com.au/SET/WE_data_web.htm

I remember him talking about that in an older video. I'm not sure which one though. He does use the rough side (inside) of the skin like a carabiner strap and it works just as well. Using the strop a little loose was a better way, particularly better than a glued to a wooden board strop (paddle-strop I think they're called). I've forgotten the exact reason though.

What Ven is talking about is the difference in texture of the face side of the strop at its top and bottom parts. The texture becomes deeper towards the end of the Kangaroo tail, and this is where it is most effective. Ven suggests to have the swivel clasp on the top and bottom ends of the strop, so that we could do 5 strokes, then hang the strop the other end up and do 5 strokes more, and so on. He thinks this way we will be giving the edge better treatment. But I think that the edge already gets uniform treatment, because we flip the knife with each stroke, and each side of the edge goes through the whole length of the strop.

@@knifegrindersaustralia5158 Ah, I thought he was talking about strops like mine that have a carabiner strap on the back. Maybe google translate failed me, not surprising, but I use if often when talking to a friend in Germany and reading YT comments... or maybe I read too quickly. The later, for sure. Thank Vadim.

@@theoneandonlyowl3764 Neither methinks. It is impossible to understand what Ven was writing about unless you have the tail :) This texture feature is 'Roo tail specific.

@@knifegrindersaustralia5158 I've 6 strips of 4" by about 3' lengths in the cupboard waiting for me to do something with, but I'm sure they're body leather. I'll need to take another look at them and see if I can acquire a good long wide tail from the same bloke... processed correctly as you talked about. Regards