You guys bring up a good point and this could be what we are seeing especially given the length of blade. However, in my experience, a blade with an active pattern usually "pops" fairly quickly and it is the blades with minimal folding that need much more coaxing to bring out what pattern, if any, is there. Steve, your suggestions are a great way to make sure it is being soaked properly. Another beneficial method would be to do multiple vinegar soaks and in between after a good rinse and wipe off to give the blade a good once over with a very fine grit paper, and then repeat process over.
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