Main Discussion Area > Flintknapping
Knapping in Texas
le0n:
^^ thanks, guys.
i'm going to attempt to cook a few of them in a few days.
what temp and duration do you recommend for bull gravel, Patrick?
(also, the landscaping place is on 35, just north of the outlet mall)
said rocks:
this one on the right had a long flake scar on it:
the test rock (in the background) had a geode center.
sort of wondering if i can work this spall to have the crystals on the base of the point (if i don't break it):
two halves that i found in the bin:
i like the color variation of this one:
and a re-enactment of what happened this morning while testing the soft rock. i felt it hit me and then the glove was pinned to my thumb.
there was no denying the blood flow when i removed that little talon. i decided to get ready for work after that, hah hah.
next time i'll use a thick leather pad to hold the nodule.
JackCrafty:
For cooking temps, see the last line of my signature: Light Colors: 200deg for 24hrs, 400deg for 4hrs, Cool for 12hrs.
That's a good rule of thumb for most stone. If it doesn't respond, you can try higher temps if you have a kiln. (500 to 650 degrees). If it breaks up at 400+ degrees, then back off to 300. Less than 300 doesn't do much.
If you have dark colors (browns, greys, blacks) they tend to like lower temps in most cases: 300 to 350 degrees. You have to experiment with the dark stuff.
le0n:
Thanks, man :)
JackCrafty:
Let us now how it works out. You've got some nice stone there, especially the tan stuff. I need to take a trip out that way... :)
le0n:
here's an attempt at the raw rock. geeze, it is tough.
it takes some serious pressure to drive even the shortest of flakes.
so i now have a baseline to compare against the heat treated material.
this is the spall it came from:
(i couldn't find the tool in google+ to just draw a circle around it)
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