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knapping problems

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armymedic.2:
matt, that makes sense.  i  have been doing just the opposite, and i will try your way.   i have made a couple that came out well, but that it is out ten or so,  my others are flakes sharpened.  i think i may also be using percuission for too long, and need to switch to pressure sooner.  i am only using pressure to sharpen at this point, and have come to think that may be way i am breaking too many-percussing while it is too thin.  thanks all.

MattE:
What kind of stone I have is the deciding factor of whether I use percussion or pressure.
I use all pressure on Obsidian and all percusion on Ryolite.These materials are at opposite end on the hardness scale.Material that falls in between these two may get both methods applied to them. I do sharpen all my edges with percussion....... I don't know how to post pictures but maybe One of the other fellows here will . there are some pretty good knappers on this forum that know all the little tricks and turn.

MattE:
I typed an incorrect word in my previous post. I mean't to say all my edges are done by pressure flaking not percussion. Sorry for the error!
Take care friends.

armymedic.2:
thanks matt, i can not seem to get lopng flakes for thinning with pressure well, so i am stioll using percussion on obsidian in the beginning.  gives me abou a 30% success rate, but will have to do until i get better at getting long flakes with pressure.

mullet:
    When you get to the point you are getting the preform thin,Try using pressure flaking to set up a platform.Then by pinching  and pulling with your fingers you can make the flake travel where you want with percussion.

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