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Old 05-16-2018, 11:25 AM
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Laura Doerger-Roberts Laura Doerger-Roberts is offline
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Compatability concern?

This piece jumped off the punty last night. As I was looking at the shards, I noticed that the glass broke apart in layers. Should I be overly concerned when we go for this one again? Any advice or analysis is appreciated.
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Old 05-16-2018, 05:34 PM
Dan Vanantwerp Dan Vanantwerp is offline
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If it jumped off and broke into those pieces I don't think you can tell much of anything. Just see what happens next time when it makes it in the box. You could have thrown some bigger shards into the annealer at the time and gotten an idea of how the colors would behave.
I like to take nice colorful chunks like that and cut them down with tile nippers to the size of a pendant. Use some nichrome wire or copper for a fusable bale and presto...$10.
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Old 05-16-2018, 06:49 PM
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Pete VanderLaan Pete VanderLaan is offline
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I would prefer fundamental basic testing.
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Old 05-16-2018, 07:06 PM
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Laura Doerger-Roberts Laura Doerger-Roberts is offline
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I did throw the main body piece into the annealer, so I will check it out.

I pseudo assume that colors marketed as tested compatible by the manufacturer would be, well, compatible. The only thing that is raising my eyebrows is the way it broke when it hit the floor.

I thought maybe the vast collective here might have seen something in the shards that was apparent to those more experienced than I.
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Old 05-16-2018, 09:11 PM
Andrew Boatman Andrew Boatman is offline
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Is that aquamarine?
We had a bar of aquamarine that was not compatible.
a
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Old 05-16-2018, 09:44 PM
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Laura Doerger-Roberts Laura Doerger-Roberts is offline
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Quote:
Originally Posted by Andrew Boatman View Post
Is that aquamarine?
We had a bar of aquamarine that was not compatible.
a
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Old 05-17-2018, 08:22 AM
Eben Horton Eben Horton is offline
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Different colors can cool at different rates. That does not mean itís incompatable given a proper turndown cycle.

What happened here is the colors cooled at different rates and provided those suspiscious cracks.
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Old 05-17-2018, 10:39 AM
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Pete VanderLaan Pete VanderLaan is offline
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I think Eben is correct here. Expecting all color to fit all color is not a reasonable expectation. While it may be the case that a color with a linear expansion factor of 94.5 would fit a 96 L.E.C. clear and a 97.5 L.E.C. color would fit a 96.0 L.E.C. clear, It would not follow that they all fit each other. A 97.5 5 is not going to fit a 94.5 if one was to test it rigorously. Laminating color together directly is a fast path to an education you don't really want. If one works fluorine color for long, it changes expansions handily and not necessarily in a good way.

Further, It is not a safe assumption that the clear is in fact a 96 either. There are a lot of clears out there. Cristalica is about a 97.5 and SP87 is about a 96. Old sys96 was a 94.1 BE is a 90 or so. In my shop, we test after every new melt with a basic ring test even if the formulations have not changed. We assume we are subject to error and want verification. Most factories in W.Va knew this and tested every day. ISO 9000, what a concept!

Add to that bad annealing and putting a piece away too cold. When it breaks, it looks like it's time to blame the color company and in reality, it's bad shop practice.
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Old 05-17-2018, 08:53 PM
Michael Ahlefeldt-Laurvig Michael Ahlefeldt-Laurvig is online now
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If you dropped it off the punty, it was probably too cold to start with and the chards wont tell you anything, I dont think
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