Author Topic: Blitz rock/obsidian cook (Read 5012 times)

Zuma · « **on:** September 09, 2018, 02:57:59 pm »

It's damp and chilly today so I thought I would warm up the kitchen.
I piled a bunch of jasper, Mexican Green obsidian, Flint River, and a chunk
of Coastal Plains into the pans with sand and will ramp up fast in oven to 500f.
About 5 hrs or so then slowly drop temp to 320f then shut off to cool.

Zuma

JEB · « **Reply #1 on:** September 09, 2018, 03:03:11 pm »

Obsidian?

bjrogg · « **Reply #2 on:** September 09, 2018, 03:26:10 pm »

Jeb I wondered about that to, but I remember Zuma saying he had some poorer quality green Obsidian that he could improve by cooking it.
It's a bit on the cool side here to Zuma. Was to a outside Birthday party last night and the long sleeves and jacket really wasn't enough. Just a few days earlier it was almost 90 with unbearable humidity. I don't mind looking for another jacket.
Bjrogg

JEB · « **Reply #3 on:** September 09, 2018, 04:17:04 pm »

If that is the case then I wonder how it turns out BJ as I have some black obsidian that is crap.

Zuma · « **Reply #4 on:** September 09, 2018, 06:23:39 pm »

Quote from: JEB on September 09, 2018, 04:17:04 pm

If that is the case then I wonder how it turns out BJ as I have some black obsidian that is crap.

Steve Nissley turned me on to it. I had an 80# spall I bought at the Ridge in 2015.
It was dried out and horrible to knap. I have cooked it several times and there was
marked improvement. Works on dried out Dacite also, I have a couple threads about it.
Bj I crutched down to the local picknick in a hoody and jacket yesterday afternoon brrrr
Zuma

bjrogg · « **Reply #5 on:** September 09, 2018, 07:17:52 pm »

Don't even mind it cooling down a bit but the days are getting shorter. Still dark at 6:00am and suns gone by 8:00 pm.

Zuma · « **Reply #6 on:** September 09, 2018, 08:57:42 pm »

BJ just remember that the deer will be coming out to the grass sooner

Here is a link that has a bit about that tough obsidian.

Green Obsidian knife

Zuma · « **Reply #7 on:** September 10, 2018, 08:47:53 pm »

Every thing turned out great, Dacite too.

Actual time six hours.

The Mexican obsidian, I think needs only 400 degrees.

It abrades well and the flakes are smooth but there is a tendency to lop to easily.

Zuma

Zuma · « **Reply #8 on:** September 21, 2018, 05:59:03 pm »

It took kid gloves to coax this one out of the Mexican Green.

It started as a 1.5" thick brick

Zuma

bjrogg · « **Reply #9 on:** September 21, 2018, 06:44:11 pm »

That's a sweet point there Zuma. Doesn't look like a brick anymore.
Bjrogg

Chippintuff · « **Reply #10 on:** September 23, 2018, 02:57:53 pm »

That is a nice one Zuma. Those bricks and rounds are the hardest pieces to get much out of.

WA

Zuma · « **Reply #11 on:** September 23, 2018, 03:29:12 pm »

Thanks BJ and Chip,
You are correct Chip.

Since this piece was so thick
it may have helped it by not getting quite as hot as the thinner pieces.

Plus it forced me to thin it a lot lengthwise.
If I can get a decent platform on a corner I can usually
stitch the edges from one side to the other creating ridges
and thinning the edges.

Zuma

Hawkdancer · « **Reply #12 on:** September 23, 2018, 10:46:04 pm »

Nice looking point, got to get to chipping some rocks after I get the bow finished and some arrows made Sorry to hear the knee isn't repairable. Maybe a shot of "Joint Juice" would help, it's supposed to provide lubricant similar to the cartilage and regular fluids. Don't know the technical term for it, but it seems to work pretty good.
Hawkdancer

Ryan Jacob · « **Reply #13 on:** September 24, 2018, 03:00:30 am »

Zuma
Knee replacement surgery?

mullet · « **Reply #14 on:** September 24, 2018, 05:10:16 am »

Joint juice or Gold shots didn't do my knee any good. The total replacement did, though.

Primitive Archer