For what it’s worth, I have a Delica 4 in ZDP-189 and I’ve noticed a distinct difference in how the blade wears. Unlike all of my other blades (cheapies all) and all of the other blades that come to me, the ZDP never gets the deep dents, caused by pressing against something hard. It does get rough along the apex like every other knife does with use but never gets the dents which require the removal of a lot of steel. I attribute this quality solely to its hardness (approx. RC 64).
Ugh! Hardness good.
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