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Tips, Techniques, and Questions -- Technical questions or tips

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  #1  
Old 2015-05-11, 5:17pm
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Mina Mina is offline
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Default Glass on stone

Has anyone tried to add glass to rocks? What did you make? Did it survive?

This rock was black before it went into the kiln to get it hot. For some reason, the glass kept bubbling up after I applied it. You can see the bubble holes really well on the second photo. I didnt have to add very much torch heat to the glass for it to bubble up. It came out of the kiln in one piece (both the rock and the glass).
If the glass doesnt crumble right off the rock soon, Im gonna see what else I can do with this.
PS. I dont know what kind of rock it was. I got it off of the beach in WA.
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  #2  
Old 2015-05-11, 6:12pm
dusty dusty is offline
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Rocks can have nasty stuff in them - arsenic, etc. Be careful torching unknown rocks.

Last edited by dusty; 2015-05-12 at 6:53am. Reason: arsenic is in rocks, not cyanide
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  #3  
Old 2015-05-11, 6:31pm
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Really?!! Oh wow, didn't know that!
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  #4  
Old 2015-05-11, 7:12pm
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Moisture inside can cause them to go boom as well. Play safe
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  #5  
Old 2015-05-11, 7:29pm
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Tom, I knew about that one. I made sure to place the stone in the cold kiln before turning it on. I let it soak up a lot of heat to dry it out before using it.
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  #6  
Old 2015-05-12, 2:22am
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I'd be terrified to try this, but it's exciting to see someone else try! And hey, it's in one piece. I call it success, but yeah, be careful.
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  #7  
Old 2015-05-12, 3:41am
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Default rocks and glass

I was going g to try the opposite...
I was wondering if I could incorporate sand onto the surface of the glass.

Has anyone tried that? I thought rolling the glass in some beach sand, like a like coating if frit? Or placing a small pebble like a murrini?

Any ideas?

Kristin
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  #8  
Old 2015-05-12, 3:43am
knittyditty knittyditty is offline
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Default rocks and glass

I was going g to try the opposite...
I was wondering if I could incorporate sand onto the surface of the glass.

Has anyone tried that? I thought rolling the glass in some beach sand, like a like coating if frit? Or placing a small pebble like a murrini?

Any ideas?

I really like that rock though.... would be a cool souvenir from a trip.
Kristin
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  #9  
Old 2015-05-12, 5:24am
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I've never tried encasing a small pebble, but have successfully encased sand in beads. The trick is to not use much sand and a thick encasing. Kind of like using glass of different coe together.
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  #10  
Old 2015-05-12, 5:33am
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Aye and make sure everything you are working with has been through a good drying cycle.

At annealing temps, what doesn't bubble up and give you holes in the molten glass could fester up and go boom if it doesn't have an escape route.
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  #11  
Old 2015-05-12, 6:17pm
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Quote:
Originally Posted by knittyditty View Post
I was going g to try the opposite...
I was wondering if I could incorporate sand onto the surface of the glass.
Yes, Maren does it with volcanic sand
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  #12  
Old 2015-05-13, 3:49am
knittyditty knittyditty is offline
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oooo send link or pic please!
The sand I want to use is from a trip to Hawaii for my parents 50+ anniversary.
Thought I would make Mom a bead.

Kristin
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  #13  
Old 2015-05-14, 1:19pm
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In most cases you can, rocks and stones survived high temperatures, pressure for ages before you take a piece in your hand.

Just one thing - "soft" stones (like marble, travertine, etc) usually are pretty fragile, they have "veins" in their structure (inclusions of minerals) and may thermal shock (they sometimes crack even if you saw them using a tile saw with high quality blade for cutting stone, thin and pretty expensive). Travertine and other stones with porous structure do not distribute heat well.

But in general you can if you have a piece of stone with uniform (virtually) structure. And you can always put in your kiln (sand used in glass production also was a stone ages ago before time, wind, temperature and moisture did their job....). It may be tricky to retain a piece evenly heated depending on the size and form of the stone, but why not.
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  #14  
Old 2015-05-14, 1:55pm
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Quote:
Originally Posted by houptdavid View Post
Yes, Maren does it with volcanic sand
Just a FYI, the COE of lava rock is around 2.5, if I remember correctly. A friend brought me a bunch of black sand back after her Hawaii trip and I tried it with 104 and boro. 104 fragmented but the boro held up (5% or so of the entire piece).
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Old 2015-05-19, 5:14am
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i'd use Moldavite or Tektite, both of which can be bought on ebay fairly cheap.
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  #16  
Old 2015-06-09, 6:07pm
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I've used beach sand on my beads.
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  #17  
Old 2015-06-10, 2:14pm
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work with drift wood its easier
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