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Questions about rock inclusions

Posted: Tue Mar 18, 2003 12:39 pm
by Suzanne Taggart
My daughter collected tiny pieces of iron ore that wash out of our hill for inclusions in some glass tests I wanted to do. My husband became alarmed and suggested I post to the board.

I saw a wonderful bowl where the bottom was slumped over a mound of rocks - very cool which provided the inspiration....

Has anyone tried this? With what results....

Posted: Tue Mar 18, 2003 12:45 pm
by Brad Walker
Some rocks have moisture in them and will explode or crack when heated in a kiln. If you're going to try this, first prefire the rocks to see how they react to the heat.

Posted: Tue Mar 18, 2003 12:49 pm
by Suzanne Taggart
Thanks for the warning. I suppose knowing something about geology would help here.....

By the way, I love the new format and find it so easy to use now....

Posted: Tue Mar 18, 2003 11:35 pm
by Lynn Bishop
Don't forget to kilnwash the rocks first. Then remove after firing, wash, and glue on. Lynn Bishop

Posted: Wed Mar 19, 2003 10:34 am
by Kelly Burke Makuch
Has anyone tried encasing seashells? How did it work?

Posted: Wed Mar 19, 2003 10:53 am
by charlie
Kelly Burke Makuch wrote:Has anyone tried encasing seashells? How did it work?


they'll probably turn to powder at fusing temps. they're only calcium loosely held together.

shells

Posted: Wed Mar 19, 2003 1:47 pm
by Dick Ditore
Some shells turn to powder, and some remain. Some just a ghost. You can slump, fuse over them on a bed of sand and get some shell design.


Dick

Posted: Wed Mar 19, 2003 3:57 pm
by Jerry
About these rocks. Are they being encased? Is COE an issue? Does Quartz expand more than Granite? Are they just being used as a form to create a pedestal? Seems like I've seen something like this as well and had no idea how it was accomplished.

Appreciate the help,
Jerry

Posted: Wed Mar 19, 2003 4:04 pm
by charlie
Jerry wrote:About these rocks. Are they being encased? Is COE an issue? Does Quartz expand more than Granite? Are they just being used as a form to create a pedestal? Seems like I've seen something like this as well and had no idea how it was accomplished.

Appreciate the help,
Jerry


granite is mostly quartz. http://www.britannica.com/eb/article?eu ... ranite&ct=

there was something about an artist in (new mexico?) who does this. look in the old archives for references.

Encasing seashells

Posted: Thu Mar 20, 2003 12:50 am
by Bonita (Nita) Crawford
I have tried two or three times to encase seashells in glass, both
float and BE but they crumbled and turned an ugly grayish color.

Warmly,
Nita

Re: Questions about rock inclusions

Posted: Tue Jun 26, 2012 3:29 am
by Reba
Suzanne Taggart wrote:My daughter collected tiny pieces of iron ore that wash out of our hill for inclusions in some glass tests I wanted to do. My husband became alarmed and suggested I post to the board.

I saw a wonderful bowl where the bottom was slumped over a mound of rocks - very cool which provided the inspiration....

Has anyone tried this? With what results....


hi, i was just thinking about how to get sand and rock in/on/under fused glass and came across this older post.

did anyone ever try slumping over rock? rock on sand?

thanks,

reba

ps i read that you can slump over shells on a sand bed with some results too.)

Re: Questions about rock inclusions

Posted: Tue Jun 26, 2012 4:19 am
by Lynn g
When you pre-fire the rocks, it's a good idea to put them under a stainless steel bowl...just in case they do explode, it will be contained.

Re: Questions about rock inclusions

Posted: Fri Jun 29, 2012 9:46 pm
by JestersBaubles
Reba wrote:
did anyone ever try slumping over rock? rock on sand?



At a class I took this year at the expo, one of the instructors had a piece where the bottom of a bowl was slumped over rocks. It was very interesting.

Dana W.

Re: Questions about rock inclusions

Posted: Sun Jul 08, 2012 10:44 am
by Mark Hall
I've seen hot glass pick up rocks onto a gather, and casters pour including them in their molds - both with favorable results. However it's a crap shoot, with every rock different components. The ones I saw used were small and well-rounded.

Re: Questions about rock inclusions

Posted: Thu Jul 19, 2012 12:59 pm
by Reba
hi dana,

thanks for your feedback. i haven't seen it, but when someone on the board described "slumping glass over rocks on a bed of sand" it sounded lovely. also, i live on an island so i have lots of rocks and sand.

when you say the bowl was slumped over rocks, do you mean the bowl achieved its slumped shape from the rocks, or did the glass slump and contain the rocks?

thanks,

reba

JestersBaubles wrote:
Reba wrote:
did anyone ever try slumping over rock? rock on sand?



At a class I took this year at the expo, one of the instructors had a piece where the bottom of a bowl was slumped over rocks. It was very interesting.

Dana W.

Re: Questions about rock inclusions

Posted: Thu Jul 19, 2012 1:10 pm
by Barb R

Re: Questions about rock inclusions

Posted: Thu Jul 19, 2012 9:27 pm
by JestersBaubles
[quote="Reba"]hi dana,

when you say the bowl was slumped over rocks, do you mean the bowl achieved its slumped shape from the rocks, or did the glass slump and contain the rocks?

thanks,

reba

[quote="Reba"]

The rocks were not included in the bowl -- they were kiln-washed and the glass slumped over them.

Dana