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Post by orrum on May 22, 2016 8:59:30 GMT -5
How about 330 epoxy. I have used it on knife handles and it don't give up but have never ground and polished it?
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Post by radio on May 22, 2016 9:30:17 GMT -5
How about 330 epoxy. I have used it on knife handles and it don't give up but have never ground and polished it? A couple of years ago I had to repair a set of knife scales that had 330 used on them. The stuff gets really, really nasty when hit with a buffing wheel! I had one helluva time fixing my Ohshit moment when that happened! the heat and friction of even a light touch causes it to drag on the wheel and basically roll up.
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Post by orrum on May 22, 2016 11:59:34 GMT -5
Good info Rafio, saves me that mistake! Thanks pardner!
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Post by radio on May 23, 2016 16:18:04 GMT -5
Good info Rafio, saves me that mistake! Thanks pardner! Your mileage may vary:-). I use Zam on a yellow cloth buffing wheel turning at 1,800 rpm, so it generates a good bit of heat and friction.
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gemfeller
Cave Dweller
Member since June 2011
Posts: 3,767
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Post by gemfeller on May 24, 2016 20:22:38 GMT -5
How about 330 epoxy. I have used it on knife handles and it don't give up but have never ground and polished it? A couple of years ago I had to repair a set of knife scales that had 330 used on them. The stuff gets really, really nasty when hit with a buffing wheel! I had one helluva time fixing my Ohshit moment when that happened! the heat and friction of even a light touch causes it to drag on the wheel and basically roll up. Radio, I don't know what effect you're looking for or what kind of polishing technique you're using, but here are images of a turquoise inlay piece I made long ago. I used Epoxy 330 blackened with a little soot from a candle. It's had very little use but the epoxy color and stability seem very good over 25 years or so. I really can't recall how I finished the epoxy but I don't remember any particular problems. I made and sold a lot of these pieces and similar back in the day.
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Post by orrum on May 24, 2016 20:44:05 GMT -5
Getting confused. Can you grind and polish 330 epoxy? How but Devcon Steel black epoxy? If so what with?
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Post by broseph82 on Jun 2, 2016 10:50:07 GMT -5
Would ice resin work?
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Post by radio on Jun 5, 2016 18:54:21 GMT -5
Sorry, I've been out of the loop for a few days.
Gemfeller: Nice watch band ends! I have no problems going to 3,000 grit with water on the wheels. My problems start when buffing the piece with Zam. If the epoxy touches the wheel, it dulls it quite badly, and will actually start pulling the epoxy and rolling it up while discoloring it badly with the black residue from the silver. Buffer is turning at 1,800 rpm. It must be the heat generated by friction as I have also tried polishing the epoxy on the canvas wheel with 13,000 diamond with similar results.
Orrum: With everything I have tried so far, the Devcon will only polish to a matte finish. If placed on a piece of plastic to cure, as in backing Turquoise, it is very smooth and shiny.
broseph: I had some Ice resin that I tried with same results as 330, but it was quite old, so I blamed that for it failing to harden.
I did a ring just today with Turquoise chips in Devcon, so will see how it comes out in a day or so.
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Post by orrum on Jun 5, 2016 19:57:30 GMT -5
Waitin on that ring Radio?
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gemfeller
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Member since June 2011
Posts: 3,767
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Post by gemfeller on Jun 6, 2016 17:31:17 GMT -5
Sorry, I've been out of the loop for a few days. Gemfeller: Nice watch band ends! I have no problems going to 3,000 grit with water on the wheels. My problems start when buffing the piece with Zam. If the epoxy touches the wheel, it dulls it quite badly, and will actually start pulling the epoxy and rolling it up while discoloring it badly with the black residue from the silver. Buffer is turning at 1,800 rpm. It must be the heat generated by friction as I have also tried polishing the epoxy on the canvas wheel with 13,000 diamond with similar results. Radio, Thanks for the good words. I agree that heat is probably your problem with epoxy 330. I'm too slammed with other stuff right now to experiment but as I recall my cutting methods from when I made those pieces I used mostly cerium on wet felt for polishing and didn't let the workpiece "drag" to generate lots of heat. People use so many different types of equipment and techniques it's hard to generalize on cutting/polishing methods. I remember filling some voids in Koroit boulder opal with epoxy a couple of years back and I'm sure I followed my regular Genie wheel progression up to 14K Nova wet, then to wet polish on a separate machine with either cerium or Holy Cow. Instead of felt for oxides I use a composition polishing pad from Hi-Tech these days. It worked really well. Good luck with whatever approach you decide on.
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Post by radio on Jun 6, 2016 20:26:32 GMT -5
Waitin on that ring Radio? Here you go. The Devcon had not completely set up to full hardness, but I rushed it through this morning and only took it to 3,000 on the wet wheels. Tomorrow I will try to see if the 13,000 diamond on canvas works, or not
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gemfeller
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Member since June 2011
Posts: 3,767
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Post by gemfeller on Jun 6, 2016 20:41:33 GMT -5
Beautiful!
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Post by radio on Jun 6, 2016 20:47:24 GMT -5
Thank you! I do like the black the Devcon imparts to the inlay. This bears further experimentation, so I need to make some more channel and will likely add some dividers next time and maybe alternate Turquoise and Lapis, or maybe even some Opal
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Post by orrum on Jun 6, 2016 21:04:45 GMT -5
It's working Radio!!! So next we see how the polish goes.
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Post by radio on Jun 7, 2016 16:52:16 GMT -5
It's working Radio!!! So next we see how the polish goes. 13,000 didn't do anything for the Devcon any better than the 3,000 did. Might do an inlay with CA glue one of these days just for grins.
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Post by orrum on Jun 7, 2016 19:48:47 GMT -5
So maybe ca glue is it then....
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Post by radio on Jun 7, 2016 20:51:19 GMT -5
So maybe ca glue is it then.... May be, but I do like the contrast of the Turquoise against the Black Devcon. What is interesting is that I can back a cab with Devcon, lay it on plastic to cure and it hardens to a nice semi gloss. Just for grins today, I worked the backing through the stages from 200 through the 13,000 on a dry canvas pad and got a decent semi gloss polish. With the Turquoise chips inlaid, the Devcon refuses to polish to even a semi gloss. weird huh?!?!
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Post by orrum on Jun 8, 2016 7:05:12 GMT -5
I want to use my turquoise chips to make cabs with Devcon! Maybe flat lap and put a glass cap on. U can buy caps that only need final polish.
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Post by radio on Jun 8, 2016 8:30:04 GMT -5
I want to use my turquoise chips to make cabs with Devcon! Maybe flat lap and put a glass cap on. U can buy caps that only need final polish. Those would be cool! Colbaugh processing gets big bucks for their "Mojave Turquoise"
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wampidytoo
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Member since June 2013
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Post by wampidytoo on Jun 8, 2016 9:07:44 GMT -5
I have never liked turquois but in that ring it is awesome. Incentive to give your method a try but I do not do metal. Maybe a mahogany ring with inlay would work. hhmmmmmmm Thanks for the sharing your knowledge. Jim
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