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My crap
festy-val 2007 part B 
9th-Apr-2007 12:46 pm
and in a grand continuation with glassworking, here's the long awaited beading furnace.



the grand industry pit. iron ore was also smelted here :)


 
viking style valved belows, into a beehive furnace (which needed to be A LOT larger)

 
up close and personal with the fire. it got so hot i had to work over the furnace. a bit annoying, but them's the breaks.

 
waiting for th ewhole lot to heat up, and then the furnace broken open at the end to see the wall thickness and how far the vitrification went.


 
the final beads produced. ugly as sin, but functional as beads ;)



heroes of the dust bowl. a big shout out to those who helped !
Comments 
17th-Jun-2007 10:02 pm (UTC)
The International Network of Spies reports:
Excellent! Had to be the first festival I've missed in 5 years, huh? Maybe next year..... (with less dust!)

Suzanne
18th-Jun-2007 12:47 am (UTC) - bead furnace
Nice. We made one of these at an event in Manitoba last fall, used local mud from the lake mixed with straw, turned out to be too wet, took 2 days to dry. You can see a little bit of it at the tail end of this video:

http://www.youtube.com/watch?v=lGf6jUn9eBw

This year we're planning a little different design, and building bigger bellows.
18th-Jun-2007 03:37 pm (UTC) - Re: bead furnace
The International Network of Spies reports:
>out to be too wet, took 2 days to dry.
>You can see a little bit of it at the tail end of this video

In my experience, one thing people seem to miss in this,
is that you don't need, and (IMHO) don't want to let
it dry first! Fire it wet, but slowly.
YOu don't want to fire it fast, just to the point where the whole mass is steaming. That will help it dry in bulk, in a more controlled and even manner. THat means less cracking and spalling.

Letting it "Dry" first just means the outside is dry, but the inside isn't, unless you waited weeks, [especailly for something as god afwully thick as Sui's] When you heat that up, the dry inner walls do not conduct heat as well, so they get hotter faster, and then when that heat reaches the wet portions, and they do start emitting steam, and trying to shrink, the rigid inner and outer dry parts, can't move with the still plastic inner parts, giving cracks, and spalls if the wet portions heat fast.

I'm not saying it wont crack anyway, but they seem to be smaller, and take more heats.
18th-Jun-2007 03:38 pm (UTC) - Re: bead furnace
The International Network of Spies reports:
SInce I forgot to sign it, that was Chandra talking about firing it wet.
Chandra,
klessig@suddenlink.net
18th-Jun-2007 10:38 pm (UTC) - Re: bead furnace
i agree. i fired this wet overnight then used it the following day. i must confess the wall thickness was a little excessive ;) but i didn't get major worriesome cracks at all ! :)
18th-Jun-2007 10:37 pm (UTC) - Re: bead furnace
i found the bellows i had to be fantasic. any bigger and i would have ripped through to much charcoal, without getting any useful benefit from the heat.
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