Main Discussion Area > ABO
My NM-ABO ideas, techniques and tools
iowabow:
This is the biface before preform.
iowabow:
My thought on why this technique for reduction was used comes from a problem in the twisting of the preform. When pressure flaking near the tip, when the tip is pointed toward the thumb, the preforms wants to twist. This happens because you are pushing hard to reduce mass. Reducing the mass before the preforms phase means that this issue never becomes an issue. Square bifacing allows for a larger surface to be held this technique allow you to remove mass from three sides not two. With a leaf form you only have two options.
iowabow:
Flint knappin everyday presents its fair share of obstacles. As you work the cuts start to accumulate and flakes find there way to other cuts and deepen them. I am much more cautious now to prevent reinjuring wounds.
nclonghunter:
Cool stuff....I always say "If you aint bleeding, you aint knapping"
iowabow:
Update on the bit use in the ishi stick. These are the products of the new antler bit in the ishi stick. I have placed a number of stones under the bit to raise it. Note on this practice...the bit wants to wiggle a little causing the platform to collapse prematurely. The solution was straw or heavy dried stalk of grass to take up the gap. There is some material left to continue making more points. Total count coming in the future.
Note there has been no reshaping of bit. It is being used as seen.
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