lincoln
off to a rocking start
Member since May 2021
Posts: 20
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Post by lincoln on May 24, 2021 7:21:46 GMT -5
Ive been looking all over the net for any info/recipies for this material.
Anyone here worked with this or similar materials? Im abit worried about its brittle nature since its quite glasslike and shatters as easy as glass. It takes a very good polish tho. I know it can be tumbled but i dont feel like doing the trial and error thing with a whole QT12 barrel.
I have some amazing colored pieces to work with. But do they need extra cushioning or what do you think?
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Post by manofglass on May 24, 2021 9:26:59 GMT -5
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Post by Rockindad on May 24, 2021 10:53:05 GMT -5
I have had success treating it like other man made glass, though the stuff we have done was more resilient in the coarse stage (rotary) than run of the mill glass. We are currently running some Seiber “Agate” now.
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lincoln
off to a rocking start
Member since May 2021
Posts: 20
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Post by lincoln on May 24, 2021 16:28:00 GMT -5
Thanks to both of you for your replys.
Perhaps i should try a batch of ordinary glass before i even run my slag pieces. With the limitied amount of experience i have it seems helpful and i wont be wasting anything precious if i fail.
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Post by Rockindad on May 24, 2021 17:13:58 GMT -5
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lordsorril
freely admits to licking rocks
Member since April 2020
Posts: 866
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Post by lordsorril on May 24, 2021 21:13:01 GMT -5
Ive been looking all over the net for any info/recipies for this material. I know it can be tumbled but i dont feel like doing the trial and error thing with a whole QT12 barrel. I have some amazing colored pieces to work with. But do they need extra cushioning or what do you think? I've tumbled Leland Blue (iron by-product slag glass). Photo here: ( #132) I originally put a half a cup of 80 grit SiC in a 3/4 full QT12 barrel for a week to test, but, my slag glass was a lot tougher than regular glass and quickly scaled it up to 1 cup of 46 grit/week and it still took a few weeks/recharges to shape the pieces up. I definitely used pre-rounded river gravel as 'cushioning' since the material has an irregular fracture pattern. Because I had a lot of sharp edges due to air bubble pores I added 1/2 cup of #120 AOx to the coarse grind as well to soften up the edges. I probably wouldn't run a mixed batch of stones with this material in a rotary unless they very small and were already pre-rounded to some extent. My stuff had some iron splinters stuck in it too, had to repeat a few batches in my vibe out of coarse to clean it up for polish.
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lincoln
off to a rocking start
Member since May 2021
Posts: 20
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Post by lincoln on May 25, 2021 15:38:15 GMT -5
Thanks for the hint will be checking that out. Oddly i have a few glass pieces that is broken thats quite chunky but i will need more for a whole barrel.
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lincoln
off to a rocking start
Member since May 2021
Posts: 20
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Post by lincoln on May 25, 2021 15:49:16 GMT -5
Ive been looking all over the net for any info/recipies for this material. I know it can be tumbled but i dont feel like doing the trial and error thing with a whole QT12 barrel. I have some amazing colored pieces to work with. But do they need extra cushioning or what do you think? I've tumbled Leland Blue (iron by-product slag glass). Photo here: ( #132) I originally put a half a cup of 80 grit SiC in a 3/4 full QT12 barrel for a week to test, but, my slag glass was a lot tougher than regular glass and quickly scaled it up to 1 cup of 46 grit/week and it still took a few weeks/recharges to shape the pieces up. I definitely used pre-rounded river gravel as 'cushioning' since the material has an irregular fracture pattern. Because I had a lot of sharp edges due to air bubble pores I added 1/2 cup of #120 AOx to the coarse grind as well to soften up the edges. I probably wouldn't run a mixed batch of stones with this material in a rotary unless they very small and were already pre-rounded to some extent. My stuff had some iron splinters stuck in it too, had to repeat a few batches in my vibe out of coarse to clean it up for polish. Amazing, thats some beautiful pieces! The stuff looks quite similar. But many of my pieces looks to be quite solid, but maybe the airbubbles start popping out when i tumble them. 🤭 Color combinations looks quite the same as well. I Have some green ones too even tho their called Swedish blue. They seem to be at the very top or bottom of the smelt and therefor often with some various impurities. I do have some pieces with more to alot of bubbles in them also some pieces with a dark pattern in them but i dont think they will do so well in the tumbler either. Wonder what makes the slag being solid vs having lots of bubbles. Did you get any problems with fracturing or was rounded gravel good for cushioning them?
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lordsorril
freely admits to licking rocks
Member since April 2020
Posts: 866
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Post by lordsorril on May 25, 2021 18:11:04 GMT -5
Did you get any problems with fracturing or was rounded gravel good for cushioning them? I did not have any fractures with rounded gravel even with some larger tumbled pieces (not shown yet). While the material I have is harder than regular glass, it still took very little effort to cleave it (albeit erratically) with a chisel and sledge.
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lincoln
off to a rocking start
Member since May 2021
Posts: 20
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Post by lincoln on May 26, 2021 4:48:44 GMT -5
Did you get any problems with fracturing or was rounded gravel good for cushioning them? I did not have any fractures with rounded gravel even with some larger tumbled pieces (not shown yet). While the material I have is harder than regular glass, it still took very little effort to cleave it (albeit erratically) with a chisel and sledge. I believe the material i have is a bit hader than glass, should be very similar to your slag i believe. Yeah it breaks kinda however it wants. Quite often into quite thin shards that ends up being scrap.
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