Primitive Archer

Main Discussion Area => Flintknapping => Topic started by: David_Daugherty on June 01, 2015, 07:19:14 pm

Title: PicturE Jasper
Post by: David_Daugherty on June 01, 2015, 07:19:14 pm

a friend gave me a slab of picture Jasper today.  Is this material knappable?

Title: Re: PicturE Jasper
Post by: cowboy on June 01, 2015, 08:47:33 pm

I think it's all knappable if you have a way to heat it. Looks like picture wants 650. Happy knappin.

Title: Re: PicturE Jasper
Post by: David_Daugherty on June 01, 2015, 08:54:37 pm

Thx for the info Cowboy.  Don't have a kiln so may just have to keep it as a slab 😒

Title: Re: PicturE Jasper
Post by: Chippintuff on June 01, 2015, 10:32:46 pm

A turkey roaster will make it nice. I have ruined some at 430 degrees, while other pieces did well at that temp.

WA

Title: Re: PicturE Jasper
Post by: cowboy on June 02, 2015, 08:29:13 pm

David; I would heed chippintuff's advice. I don't live up there and rarely buy material. Try a roaster or cook in the ground, bet you'll be pleasantly rewarded.

Title: Re: PicturE Jasper
Post by: TRACY on June 03, 2015, 07:53:55 am

Ttt

Title: Re: PicturE Jasper
Post by: TRACY on June 03, 2015, 08:07:28 am

Quote from: TRACY on June 03, 2015, 07:53:55 am

Ttt

Title: Re: PicturE Jasper
Post by: vinemaplebows on June 05, 2015, 12:18:52 pm

Depends on the exact material. I have some that want close to what Cowboy said (others 450-500) depending on thickness as well.