Main Discussion Area > ABO
"no bulp of percussion" thinning
JackCrafty:
Yep, that's pushing the material to the limit... with good results. I see that on artifacts. Broken or whole, he old knappers pushed the envelop.
iowabow:
--- Quote from: caveman2533 on December 28, 2015, 07:38:06 pm ---One step away from a perverse fracture
--- End quote ---
I don't think I have heard that term used on this site. Could you define it for me. I think you mean snapping in half.
caveman2533:
Yes usually cuts the point off at an angle, it when the crack rolls and goes vertical and cuts across the piece usually with a twist like shape to the crack. I know I sound negative about it not trying to be, just be aware like Patrick says you are pushing the limit. The thin edge is a place cracks to initiate from bending stress. This edge ripping can be done when pressure flaking also, by placing the tip above center line. Will leave a wicked sharp edge.
iowabow:
--- Quote from: caveman2533 on December 28, 2015, 10:39:32 pm ---Yes usually cuts the point off at an angle, it when the crack rolls and goes vertical and cuts across the piece usually with a twist like shape to the crack. I know I sound negative about it not trying to be, just be aware like Patrick says you are pushing the limit. The thin edge is a place cracks to initiate from bending stress. This edge ripping can be done when pressure flaking also, by placing the tip above center line. Will leave a wicked sharp edge.
--- End quote ---
cool do you have a photo of this kind of fracture? I may have done that on a small scale once. Also I am seeing a new kind of flake failure. Just wondering if it is related. These failures are not altogether bad.
iowabow:
Caveman don't worry about sounding negative when you are providing really good information. We need as much good information as we can get on this abo section. Also there are so few doing abo it's kind of a brotherhood. Keep it coming.
On that note I feel it is important to point out how much of an impact this site has had on my knapping. A lot of people had a profound impact on my development. The list is long and some no longer post on here anymore but without their help I would not be where I am.
Tower kinda jumped in early as he saw me developing and sent me rock and a set of the finest knapped thin points I have ever seen. He also sent preforms. Gundoc has talked to me for countless hours about knapping, Shannon and Jessie helped a lot, as I read through old post I saw outback Bob and Bonepile offering help and advice. I read a lot of Jamie's post about ABO. Talked on the phone a lot to Scott about Burlington heat treating and his results vs mind. Paul Wolfe "cowboy" sure helped a lot. Can't forget that JackCrafty and all the videos Patrick has made. And let's not forget the the one guy that will keep you humble and always reminds everyone why strong ABO Hunting points are necessary for a guy like me. I am sure I am leaving someone out.
Now only after years of knapping I finally have a technique to mid stage thin. I only hope this thread helps others on this ABO path.
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version