Main Discussion Area > Flintknapping
How to develop a median ridge?
Outbackbob48:
Ryan , if your points are only an 1/8" thick you have already missed your chance to flute :( I have never used slabs when doing points for flutes also. As far as flakes diving I would say your points are flat , flakes travel better over lenticular surfaces. Just my .02 worth. Bob
Ryan Jacob:
I do have some 3/8 inch stuff to work with. The thing is I’m not to good at working it and am still learning indirect
1442:
I have fluted slab points. I posted one in the flute thread recently with some process pics.
1/8" is mighty thin but you may be able to do some folsom type points about 5/8" wide, maybe 3/4".
3/8" slabs are perfect for pressure flaking a preform to be fluted. Take short flakes on the first pass all the way around on both sides to get convexity started, then continue passes all around both sides until the edges are thin enough to do a zig zag finish pass to get rid of the remaining square edge.
Then flute it, flip it, and flute it again, clean up the end and give it to your friend.
P.S.
I've even left an island of saw marks in the mid section of thin slabs just to have all the thickness possible in that area, like convexity with a flat spot.
Ryan Jacob:
Oh, that’s why, I’ve been thinning my 3/8”” stuff to under 1/4””. So I’ve been making them too thin, which is why even though they’re not breaking, they weren’t doing what I wanted them to.
1442:
yeah,
flat surface contours are not easy to knap without step flakes and then they look like a pancake when done.
Even slight convexity helps the flakes to terminate smooth and greatly enhances the finished look of the piece.
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