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Old 12-22-2016, 01:02 PM
Jordan Kube Jordan Kube is offline
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Opaque cullet

I don't remember this as an option but is it possible to make opaque glasses from cullet?

Really great stuff Dave, thanks for posting all that archived knowledge.
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Old 12-22-2016, 01:38 PM
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Pete VanderLaan Pete VanderLaan is offline
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The boro guys have been doing it adding zirconium to the pyrex cullet, or so I've heard. I can't see it doing anything that you would want to make for Mom at Christmas out of a soda Lime though. The Silver and copper colloidals are the closest thing I can imagine in that vein.
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Old 12-22-2016, 01:47 PM
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Pete VanderLaan Pete VanderLaan is offline
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Quote:
Originally Posted by Jordan Kube View Post
I don't remember this as an option but is it possible to make opaque glasses from cullet?

Really great stuff Dave, thanks for posting all that archived knowledge.
*******
The big concern I have with it being posted without attribution is copywrite. Way back when, We had a guy named Mike Firth who was essentially lifting anything he found on the internet and asserting that it was public domain given the source. We had a glassworker named Graham Stone in Australia who had published his major works, "the schedules" which is an essential book to have if you want to do big castings. Firth essentially lifted stuff that was mine word for word, paragraph after paragraph as well and asserted his right to do it and publish it on his website with no permission to do so. The net effect was to sufficiently scare Graham to where he withdrew entirely from the Glass community. Everything on Craftweb is in fact copywrite protected but it gets a lot harder when you don't have the essential attribution of source. Everything Dave dug out had original source. I think having it out there is for the most part, great stuff but I really want to see the source authorship. I recognize a good deal of it is mine but it isn't all mine.
In my last and final color class I had a student simply start to make the formulas as color rods and really undercut my price. I essentially told him he was in copyright violation so he switched methodology. It really does actually hurt. Sharing is important. So is integrity.
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Old 12-22-2016, 10:54 PM
Dave Bross Dave Bross is offline
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I can go back through my original posts and tag the names onto the info to the best of my memory.

Most of what I posted is either Pete or me anyway.


Pete,

You're welcome to go through my posts and tag what's yours too.

If there's a link in the post is that enough or do you want the name on there too?
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Old 12-22-2016, 11:03 PM
Dave Bross Dave Bross is offline
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Jordan,

Opaque from cullet is probably not easily do-able.

Too much calcium in cullet to go with phosphates and I seem to remember the experiments in Washington state trying for viable commercial colored glasses from bottle cullet couldn't get a fluorine opaque to work.

I'll see (or anyone else?) if I can find where all that Washington state info is online. I'm sure it's still out there somewhere and it would be a good addition to this section.
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