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Post by HankRocks on Sept 17, 2018 9:29:16 GMT -5
In the bottom of one of the buckets I purchased, there was a set of about 10 Sphere trim pieces glued together. I tried soaking in water for a couple of weeks with no luck. Now have the piece soaking in Acetone for about 5 days and no noticeable affect. Not sure what glue was used but my best guess is that it was glued over 10 years ago.
Any suggestions for how loosen the pieces. There are a couple of very nice Biggs pieces along with other attractive pieces that would be nice to set free. The shapes tumble polish very nicely and make nice Pendant stones.
Thanks
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Post by manofglass on Sept 17, 2018 9:43:16 GMT -5
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Post by woodman on Sept 17, 2018 9:51:13 GMT -5
I would try about 350 degrees in an oven.
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Post by fernwood on Sept 17, 2018 9:59:55 GMT -5
It all depends on what type of adhesive was used. Both of the above suggestions are great ones, plus what you tried.
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Post by hummingbirdstones on Sept 17, 2018 10:46:59 GMT -5
If all else fails, you could try Attack. That stuff is very nasty though, and I wouldn't use it except as a last resort.
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Deleted
Deleted Member
Member since January 1970
Posts: 0
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Post by Deleted on Sept 17, 2018 12:25:35 GMT -5
Also try soaking for a few hours in isopropyl and then 100% denatured alcohol. Lacquer thinner will loosen some epoxies. If all else fails, you could try Attack. That stuff is very nasty though, and I wouldn't use it except as a last resort. Just underlining your comment about it being nasty - one of those things where you want to read up on all the warnings before buying. |
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nileriver
off to a rocking start
Member since December 2016
Posts: 22 
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Post by nileriver on Sept 17, 2018 19:45:36 GMT -5
If the suggested solvents don't work, you might consider either sawing through the epoxy or breaking apart with hammer & chisel to create tumbler size pieces. I would think the epoxy is much softer than the rock, and would grind off fairly quickly in coarse grind in the tumbler.
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QuailRiver
fully equipped rock polisher
Member since May 2008
Posts: 1,640
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Post by QuailRiver on Sept 18, 2018 2:07:45 GMT -5
If you try the heating route it will be much less likely to thermal shock and crack the stones if you heat them in water and when done let it all cool naturally back to a manageable handling temperature. Many faceters who use epoxy to dop stones to a metal dop use this method to remove the stone from the dop.
A warning about using "Attack" solvent though, it contains methylene chloride so use proper safety precautions.
Larry C.
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Post by woodman on Sept 18, 2018 9:35:40 GMT -5
If you try the heating route it will be much less likely to thermal shock and crack the stones if you heat them in water and when done let it all cool naturally back to a manageable handling temperature. Many faceters who use epoxy to dop stones to a metal dop use this method to remove the stone from the dop. A warning about using "Attack" solvent though, it contains methylene chloride so use proper safety precautions. Larry C. When heating rocks to cook out oil or to break super glue bond, I don't heat them in water water but I do leave them in the oven to cool slowly to prevent thermal shock. on smaller items the water idea is a good one. |
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Post by orrum on Sept 18, 2018 17:51:14 GMT -5
Saw them.like they are!!!
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Post by Pat on Sept 18, 2018 19:07:44 GMT -5
Acetone works, but it will take a long time. Be sure to cover the bucket because acetone evaporated rather quickly.
Check daily. Pry a little daily, so the acetone can seep in further. Took days for me to loosen the little pieces in an intarsia piece. I had expected minutes. Ha!
Good luck.
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Post by HankRocks on Sept 18, 2018 19:47:02 GMT -5
Acetone works, but it will take a long time. Be sure to cover the bucket because acetone evaporated rather quickly. Check daily. Pry a little daily, so the acetone can seep in further. Took days for me to loosen the little pieces in an intarsia piece. I had expected minutes. Ha! Good luck. "Beware the fury of a patient man" |
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Post by HankRocks on Sept 18, 2018 19:53:12 GMT -5
Saw them.like they are!!! My guess is that was the original intention. A cross section would be pretty interesting. They are pretty tightly fitted together, hence the issue getting them un-bonded. |
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vwfence
has rocks in the head
Member since January 2013
Posts: 566
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Post by vwfence on Sept 24, 2018 8:54:46 GMT -5
be careful with the oven as I tried heating some softer pastolite /jasper that was purple going in and tan coming out
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Post by woodman on Sept 25, 2018 9:39:30 GMT -5
be careful with the oven as I tried heating some softer pastolite /jasper that was purple going in and tan coming out Good advice, I have had that happen to some pet wood seams, seams were white and end up black! |
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NRG
fully equipped rock polisher
Member since February 2018
Posts: 1,688
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Post by NRG on Sept 25, 2018 10:53:38 GMT -5
If you try the heating route it will be much less likely to thermal shock and crack the stones if you heat them in water and when done let it all cool naturally back to a manageable handling temperature. Many faceters who use epoxy to dop stones to a metal dop use this method to remove the stone from the dop. A warning about using "Attack" solvent though, it contains methylene chloride so use proper safety precautions. Larry C. Methylene Chloride AND some rather nasty amines (ammonia compounds). I worked with methylene Chloride for a decade as a production chemist. MC is nothing compared to the MC mixture with the amines. Watch out! |
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