different angles for different uses?

Thank-you for explaining.

I'm going to play devil's advocate here. While I understand and agree that edge geometry had little if nothing to do with that knife being able to scratch glass, I think it could have something to do with how much or little edge degradation resulted from making the scratches. It would be interesting if someone could come up with a controlled and reproducible experiment to proove what's what regarding edge geometry vs. heat treat/steel composition and how they affect performance.
 
Thank-you for explaining.

I'm going to play devil's advocate here. While I understand and agree that edge geometry had little if nothing to do with that knife being able to scratch glass, I think it could have something to do with how much or little edge degradation resulted from making the scratches. It would be interesting if someone could come up with a controlled and reproducible experiment to proove what's what regarding edge geometry vs. heat treat/steel composition and how they affect performance.

Amen :) Roman Landes comes as close as anyone i know.
 
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