Primitive Archer
Welcome,
Guest
. Please
login
or
register
.
1 Hour
1 Day
1 Week
1 Month
Forever
Login with username, password and session length
Home
Help
Search
Calendar
Login
Register
Primitive Archer
»
Main Discussion Area
»
Flintknapping
»
80 pounds of dry obsidian
« previous
next »
Print
Pages:
1
[
2
]
Author
Topic: 80 pounds of dry obsidian (Read 5213 times)
0 Members and 1 Guest are viewing this topic.
caveman2533
Member
Posts: 640
Steve Nissly
Re: 80 pounds of dry obsidian
«
Reply #15 on:
October 24, 2015, 08:20:39 pm »
Nice, It has something to do with internal stress in the rock I think similar to when glass isn't annealed correctly. I think a higher temp could even be used.
Logged
Zuma
Member
Posts: 4,324
Re: 80 pounds of dry obsidian
«
Reply #16 on:
October 24, 2015, 08:51:21 pm »
Agreed
Hope to see you with a few flakes in tow.
Thanks again
Logged
If you are a good detective the past is at your feet. The future belongs to Faith.
Zuma
Member
Posts: 4,324
Re: 80 pounds of dry obsidian
«
Reply #17 on:
October 28, 2015, 10:21:43 pm »
Well, I got a different hammerstone (sandstone). The first one I used was quartzite.
My first spall removal with it was ok but the spall came off in two parts.
The larger piece is ok but has more curve than I would like.
Things went down hill from there. I tried a hit where the core was
not as long in the direction I was taking the spall.
Even so the spall terminated premature of what I had hoped.
(right side of first flake)
The next try was back to the right of the second spall.
I really beefed up the platform and gave It a hardy blow.
The platform just collapsed.
It's back to the drawing board for now.
Between the first go rod and the second I at least have some pretty
good material for the oven.
Zuma
«
Last Edit: October 28, 2015, 10:29:40 pm by Zuma
»
Logged
If you are a good detective the past is at your feet. The future belongs to Faith.
caveman2533
Member
Posts: 640
Steve Nissly
Re: 80 pounds of dry obsidian
«
Reply #18 on:
October 29, 2015, 09:48:20 pm »
To hard of a hammer stone will split spalls
Logged
Zuma
Member
Posts: 4,324
Re: 80 pounds of dry obsidian
«
Reply #19 on:
October 29, 2015, 10:14:19 pm »
Well, Steve,
I would'nt argue with you because both Quartzite (first hammer)
and my next best hammer (Sandstone) are pretty hard.
I think I will find a ladies bowling ball and give it a go.
Better hammer /platform contact I hope.
Zuma
Logged
If you are a good detective the past is at your feet. The future belongs to Faith.
Zuma
Member
Posts: 4,324
Re: 80 pounds of dry obsidian
«
Reply #20 on:
October 31, 2015, 01:29:09 pm »
Well, Steve
I took the latest spalls and cooked
them longer and hotter. About 10 hrs overall
and a 3 hr soak. Not really much difference
for the extra energy.
The upside-- nothing blew
Zuma
Logged
If you are a good detective the past is at your feet. The future belongs to Faith.
Zuma
Member
Posts: 4,324
Re: 80 pounds of dry obsidian
«
Reply #21 on:
November 01, 2015, 09:49:16 am »
Here is the results of a piece I knapped
of the latest batch cooked.
Not to pretty but it came from a really square
hunk. It was pleasing to knap. Just percussion.
Zuma
Logged
If you are a good detective the past is at your feet. The future belongs to Faith.
Print
Pages:
1
[
2
]
« previous
next »
Primitive Archer
»
Main Discussion Area
»
Flintknapping
»
80 pounds of dry obsidian