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Wear technology
Dakota Kid:
Makes sense. Thanks for the explanation.
So you were having better success thinning with pressure using an out of mass approach, starting with more or less a completed preform?
Thinning with pressure is often one of my problem areas or perhaps stopping percussion thinning to early is to blame. More than likely it's a combo of the two.
Stringman:
Aggressive thinning should happen with percussion down to 90%. If you use out of mass principles you can continue to reduce thickness more effectively than by running flakes up and over the mass of your point. This is a subtle thing and is better demonstrated than explained.
iowabow:
--- Quote from: Stringman on June 19, 2017, 07:11:23 pm ---Aggressive thinning should happen with percussion down to 90%. If you use out of mass principles you can continue to reduce thickness more effectively than by running flakes up and over the mass of your point. This is a subtle thing and is better demonstrated than explained.
--- End quote ---
Out of mass and into mass should be a mindset during percussion and transitionally into pressure. With antler you may transition sooner and cut the stone in half. With this I mean reduce it in thickness by 50%. How much percussion you need will depend on many factors. In some cases you will have a rock that will require a lot of percussion work while others may need very little before you start pressure it just depends. Kid ask away and if need be I can shoot a short video to explain things as you learn.
iowabow:
Kid dont get to crazy about this in and out thing. It just makes my technique easier. The photo below is an into mass point and it is thin as heck for abo.
Dakota Kid:
If I'm switching to pressure too early it's only by a matter of a couple flakes.
I looked over the tutorial tower had put up and have been trying to have a flat preform when it's time to switch to pressure flaking. That has helped immensely with pressure thinning. I'll have to try a little intentional "out of mass" next time I'm in the pit and see if I notice a difference.
Typically, I just try to envision the flake I want to remove(where ever it happens to be) and approach it from where ever I need to put the flaker, whether it's into or out of mass. Half the time I pop the flake I wanted and the other half I end up with a pretty little step just before the bulk of what I wanted to remove. Perhaps eliminating some of the randomness of my approach would make things more predictable and effective.
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