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Old 04-27-2019, 10:06 AM
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Pete VanderLaan Pete VanderLaan is offline
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bomma cullet

So, John Croucher tells me that the Bomma cullet is in from the Czech republic. They tested it in his Penland Class and he said it's dead on Sp87. So that is a good place to start. He did not comment on it beyond that.
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Old 04-27-2019, 05:09 PM
Shawn Everette Shawn Everette is offline
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Supersacks were supposed to arrive this week. Any idea if they filled a pot or were just doing compatibility testing?

I'd be surprised of Penland did a full switch, they've been die hard Spruce for a while. Plus there's nothing like driving down the road for your glass.
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Old 04-27-2019, 06:35 PM
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I'm not saying that Penland switched at all. As a color rod maker, I'm sure John had an interest in the statistics. He was teaching the polarimeter and this would be a great example. My photos show small bags.
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Old 04-27-2019, 10:04 PM
Shawn Everette Shawn Everette is offline
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whoa, got a hold of the actual bags, I wants the info!!!
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Old 04-28-2019, 07:41 AM
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the photos came from Charlie to me by email.
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Old 04-28-2019, 08:42 AM
Shawn Everette Shawn Everette is offline
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Sounds like selective Beta testing, they picked a good standard bearer.
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Old 04-28-2019, 09:31 AM
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John's comments to me were solely based on the polarimetry. He has a lot invested in fitting the glasses being made. Spectrum simply ignored the elephant in the room (SP87) and it would seem that Oceanside will do that as well. Maybe Nic at Penland has gotten to use the cullet, I'm simply unaware of it.
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Old 04-29-2019, 09:49 AM
Shawn Everette Shawn Everette is offline
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Spectrum and Oceanside probably ignored 87 because they're making too much money off fused glass and didn't see the need for the effort. Other than the limited Spruce run their only real competition was Cristalica, which had issues of its own. Enough people were buying it, guilty, so why change.

That may come back to haunt Oceanside if Bomma bodes well and has any type of capacity. The price discrepancy certainly isn't going to persuade me into a dusty glass that eats my furnace. What Oceanside possibly has in the plans may be better, but they're getting beat to the punch. The opacity of information certainly hasn't helped anything, the only updates I ever see are about the plate glass.
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Old 04-30-2019, 09:00 AM
Shawn Everette Shawn Everette is offline
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Gonna leave this here. Martin's quote is hilarious.
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Old 04-30-2019, 10:19 AM
James Burts James Burts is offline
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I was at the Penland class with John Croucher. Between John and Tom Littleton, they'd gotten their hands on a handful of pieces of the cullet and made up trident seals to test the compatibility between the Bomma cullet and the SP87 that Penland melts in their clear furnace.

As John indicated to Pete, the polarimeter showed the Bomma cullet to be right on for compatibility with Spruce Pine batch. With them only having 5-10 pieces of the Bomma cullet, we obviously didn't have enough material to be able to make any observations on the working qualities of the glass. That sort of information will have to come once people get a real quantity of the glass on hand to test with.
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Old 04-30-2019, 10:48 AM
Shawn Everette Shawn Everette is offline
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Janecky is probably one of the main people I'd trust for high praise of quality and workability. Might go to others in terms of what it's doing to your furnace. The verdict should be out fairly soon, should be stateside by now, but don't know who'll get it first. My order should be in around June, but I won't be really melting it til August or September.
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Old 05-01-2019, 08:18 PM
Jordan Kube Jordan Kube is offline
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Spectrum was right on, Bomma was right on. Old and new Cristalica were about half a point off from each other and around a point high. Kugler was also a point high. The Spectrum was the only one that worked nice in the torch. It was really a great glass formula. It may have been based on Spruce Pine at some point in the beginning but it ended up being much different in the end.
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Old 05-02-2019, 06:19 AM
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In Harvey's words from many decades back "Now we have to throw it to the kids and see what they do with it."

It's such shiny promising stuff. Don't drop it.
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Old 07-25-2019, 09:51 AM
Shawn Everette Shawn Everette is offline
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Mikey no like. Bomma covered in 96.
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Old 07-25-2019, 10:35 AM
Eric Trulson Eric Trulson is offline
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What kind of 96 is the casing layer?
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Old 07-25-2019, 10:42 AM
Shawn Everette Shawn Everette is offline
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Old system nuggets, have a bunch left. Stabbed a bomma puck from the pickup and gathered over it. The hot consistency is noticeably different.

Also, fused some onto some plate 96, that didn't seem as mad.
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Old 07-25-2019, 11:45 AM
Eric Trulson Eric Trulson is offline
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Interesting.

I've never used the old System 96 cullet myself, can't remember if its expansion was off at all or if it was a dead fit with SP87.

When we tested the Bomma at the Penland class, it was a perfect match with SP87, but we just did a trident seal, not a casing overlay like you did. I'd be curious to see how the Bomma would behave getting cased in SP87.
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Old 07-25-2019, 11:55 AM
Shawn Everette Shawn Everette is offline
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The 2.0 was supposed to be a fit to 87, not the studio nugget. I'm surprised the reaction wasn't greater fused with the flat glass, going to case it between two sheets on the next run.
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Old 07-25-2019, 04:22 PM
Eben Horton Eben Horton is offline
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And the cullet drama continues
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Old 07-25-2019, 04:44 PM
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Your not being very clear. “0ld system nuggets” that implies it was the system 96 glass which was a 94 not a 96. If your fusing with sheet float system 96 it is also not 96. If your going to share your experience with this glass please be a little more clear on what your using and what the process is.

I make paper weights and one day had a helper in the shop making similar weights all her weights showed major stress in the polariscope where the ones I made from the same glass had none. You need to proof your process with a known compatible glass to have any real world information.

I also want to add John Croucher is someone that should be trusted and respected. He makes what we do work and one of the giants in the field.

Last edited by Sky Campbell; 07-25-2019 at 04:46 PM. Reason: “System nuggets” never existed only system 96 cullet
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Old 07-25-2019, 06:28 PM
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Eric Trulson is bringing some of the bomma cullet up here to run hagy seals and hopefully a fuse to my clear while I'm in California.

John C did indicate that the Bomma was dead on the SP 87. My clear is also dead on the SP87. Given that, results should be clean.

Spectrum is hard to nail down unless you are specific. There are/were three different glasses/ The Sys96 was measured by both John and me as a 94.1

The premium nuggets were measured as a 97.5 by both of us.

Spectrum 2.0 was actually right on the Sp87 measurement which was not surprising since it was the purloined SP formula.

Cristalica varies at about 1.0 above SP87 plus or minus .

I have no clue about the Oceanside or the Kugler offerings. It remains dangerous sailing out there right now.
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Old 07-25-2019, 07:57 PM
Art Freas Art Freas is offline
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Quote:
Originally Posted by Shawn Everette View Post
Old system nuggets, have a bunch left. Stabbed a bomma puck from the pickup and gathered over it. The hot consistency is noticeably different.

Also, fused some onto some plate 96, that didn't seem as mad.
Original System 96 Studio or the Improved System 96 Studio?
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Old 07-25-2019, 08:00 PM
Art Freas Art Freas is offline
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"There are/were three different glasses/ The Sys96 was measured by both John and me as a 94.1"

Actually 4

System 96 Studio
Premium Nuggets
Premium 2.0 Nuggets (SP clone)
System 96 Studio Improved (this was the low/no borax formula that was made just before Spectrum closed.)
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Old 07-25-2019, 08:14 PM
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5. if you include the system 96 cullet. This was the cut offs from the clear float they produced.
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Old 07-26-2019, 06:13 AM
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I love the "Improved" bit. When the crud initially was eating the pots, they blamed the crucible manufacturers. I had forgotten that they had to make additional awful products.
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