Primitive Archer

Main Discussion Area => Flintknapping => Topic started by: neuse on October 09, 2013, 08:47:03 pm

Title: End Snap
Post by: neuse on October 09, 2013, 08:47:03 pm
I can not figure out what I am doing to cause so many pieces to break.

I think it is end snap, but I can not figure what causes it, so I do not know how to stop it.

Help Please
Title: Re: End Snap
Post by: Tower on October 09, 2013, 08:54:49 pm
Without seeing what your doing . I would venture to say that your not stabilizing the entire  point properly when knapping. That's the quickest way I know to fold them.
Title: Re: End Snap
Post by: Outbackbob48 on October 09, 2013, 09:19:31 pm
Sounds like a support problem, but like Tower said with seeing it's hard to tell. I used to break alot due to end snap :( when I would try thinning from the base end. Better support and better accuracy helped alot, that an hittting alot of rock, tonnage helps ;D. Bob
Title: Re: End Snap
Post by: cowboy on October 10, 2013, 05:35:37 am
Hey Byron think we all need a little tune up. Sounds like end snap support issue. Or maybe platforms not quite below center. Need to sit with ya like Don says.
Title: Re: End Snap
Post by: JackCrafty on October 10, 2013, 11:03:41 am
Sounds like you are working glass or obsidian.  End snap is part of the game with that stuff.  Try not to thin from the base.  In other words, thin from the sides.  And make sure all platforms are below the centerline of the workpiece.

When a stone snaps in a place where you didn't hit it, it's cased by bending stress.  If it snaps right where you hit it, it's caused by a crack that spreads in the wrong direction.  Either way, it means you are applying too much force.
Title: Re: End Snap
Post by: neuse on October 11, 2013, 07:49:12 am
Ok thank you. It is breaking in a place other than where I strike it.
 I will limit my end thinning and provide better support.
Title: Re: End Snap
Post by: neuse on October 11, 2013, 07:50:51 am
Cowboy,
I need to schedule a time to come visit you.