Main Discussion Area > ABO
ABO techniques, processes and tools.
JW_Halverson:
--- Quote from: turbo on October 05, 2015, 09:36:37 pm ---
--- Quote from: iowabow on October 05, 2015, 09:29:57 pm ---Thank you for ringing in turbo
--- End quote ---
My pleasure and thank you for the great thread, hope I didn't hijack. BTW, I'm looking for some deer ulna bones if you have any leads. Look forward to more discussion.
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Two each, per deer.
turbo:
--- Quote from: JW_Halverson on October 05, 2015, 09:45:18 pm ---
--- Quote from: turbo on October 05, 2015, 09:36:37 pm ---
--- Quote from: iowabow on October 05, 2015, 09:29:57 pm ---Thank you for ringing in turbo
--- End quote ---
My pleasure and thank you for the great thread, hope I didn't hijack. BTW, I'm looking for some deer ulna bones if you have any leads. Look forward to more discussion.
--- End quote ---
Two each, per deer.
--- End quote ---
Yeah, I don't hunt anymore so am looking for someone that has some deer parts to part w/.
iowabow:
Use of the ulna bone...when shaping the ulna is flat to the edge and is pressed inward and down on a small platform. When notching the ulna runs perpendicular to the horizontal stone with the center of the tip on the edge where the notch is to be located. Start by loading pressure inward till a flake pops or you have reached the end of your ability to apply pressure and then rotate to change the direction of force to release the flake. After you hear the flake detach remove debris from pad and pop the corners out before you flip and repeat.
iowabow:
Use of the ishi stick...there are three foundational techniques I use most often.
Crunching : this is a process I use to remove the thin sharp edge of a flake before I start making a point. The results of this technique can be seen in an earlier photo in this post. The ishi stick is use to just scrap downward making a crunching noise like stepping on potato chips.
Cutting: a term I use to describe a technique unique to ABO knapping because with copper the platform is a little different. With cutting the platform is above the centerline and the direction of force is straight inward and often diagonal. The effect of this can be seen in flake patterns that often run edge to edge.
Hollow ground...this technique creates a hollow ground effect and is used when you suspect that a flake is going to step before it detaches naturally. This is accomplished in the same manner as cutting but just before the flake detaches you pull toward your left hand with the ishi. This also happens when the stone unwillingly rotates during cutting and can often be seen near the tip of a point. At this location the size of the stone is difficult to vice and will rotate causing the surface to hollow ground. This only happens on one side. It will be the side you see when the tip is pointed at your thumb. The only solution I have is to knap this part left handed rather than right.
iowabow:
Tonight we will visit each of these foundation pressure flaking techniques in detail as I make my next point.
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