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Tips, Techniques, and Questions -- Technical questions or tips

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  #1  
Old 2018-02-13, 9:17pm
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Default EDP here we go again

EDP ... evil devitrifying purple. I just got the memo that Effetre discontinued this color because there is a component that is now banned from being used in certain glass colors. Does anybody know what this component is, and why it can no longer be used?
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  #2  
Old 2018-02-13, 9:21pm
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Arsenic.
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"And all will turn to silver glass, a light on the water, grey ships pass into the west." Annie Lennox
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  #3  
Old 2018-02-13, 9:49pm
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Apparently they have remade EDP and Frantz is getting some soon. I don't know if it will be exactly the same. It will be interesting to try. There is a post in the sales rack about it
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Old 2018-02-13, 9:51pm
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Originally Posted by Elizabeth Beads View Post
Arsenic.
Thanks for the reply. Does this mean that the EDP that I have stashed, is a health hazard to myself while torching with it? That's a loaded question that perhaps could open up a can of legal worms along the way. Or does the problem lie in the manufacturing of the art glass? I noticed a number of lampworkers unloading it from their inventory,
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Old 2018-02-13, 9:53pm
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Originally Posted by carolinesbeads View Post
Apparently they have remade EDP and Frantz is getting some soon. I don't know if it will be exactly the same. It will be interesting to try. There is a post in the sales rack about it
Good to know! Maybe it will be even better!
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Old 2018-02-13, 10:05pm
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I don't think the arsenic is released when you torch it. People are unloading it because it is selling for about 100$ a pound on auction groups.
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Old 2018-02-14, 10:36am
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You should not have an issue if you have good ventilation even if it is released. All of the colorants in glass are a mineral of some sort. I believe the manufacturing restriction is more related to potential releases of large quantities.
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Old 2018-02-14, 4:00pm
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Yep, they are selling it if they don't use it because the price is high now.
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  #9  
Old 2018-02-14, 8:51pm
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Aye, all glass will devitrify if you cook it long enough even if it doesn't have arsenic in it.

When they make glass in crucibles that hold a couple hundred pounds the fumes from cooking the powdered minerals need to be filtered so that they don't contaminate the country side.

So it takes more than just melting it in a kiln.

We humans are learning to clean up after ourselves, eventually.
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Old 2018-02-15, 12:37pm
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Quote:
Originally Posted by Shrimp View Post
Thanks for the reply. Does this mean that the EDP that I have stashed, is a health hazard to myself while torching with it? That's a loaded question that perhaps could open up a can of legal worms along the way. Or does the problem lie in the manufacturing of the art glass? I noticed a number of lampworkers unloading it from their inventory,
I have no idea. My best guess is the environmental problems happen during manufacture. I’m still using mine.

Lampworker aren’t unloading it so much as cashing out, since other lampworkers are avidly buying it for top dollar.

I’ve personally bought some, sold it because i didn’t love it, bought some more because I really love the color, finally tamed it, and was lucky to have a few pounds on hand when it went endangered.

I’m keeping mine and using it because I’ve decided not to hoard colors any more.
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"And all will turn to silver glass, a light on the water, grey ships pass into the west." Annie Lennox
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  #11  
Old 2018-02-16, 4:50am
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Quote:
Originally Posted by Shrimp View Post
Thanks for the reply. Does this mean that the EDP that I have stashed, is a health hazard to myself while torching with it? That's a loaded question that perhaps could open up a can of legal worms along the way. Or does the problem lie in the manufacturing of the art glass? I noticed a number of lampworkers unloading it from their inventory,
I think the problem was with the bulk manufacturing of the glass.

With normal ventilation (and not boiling it to smithereens) it should be just as safe as any of the other glass we work with given that lots of colors are the result of heavy metals that are just as toxic as arsenic.
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  #12  
Old 2018-02-17, 10:25pm
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Can the type of arsenic in EDP be absorbed through the skin of the wearer?
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Old 2018-02-18, 5:10pm
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https://www.sciencedirect.com/scienc...22309317301576
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  #14  
Old 2018-02-20, 12:22pm
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I think the link Kathy posted boils down to 'No, the arsenic in EDP wont be absorbed through the skin'.

I would not want to make a wine glass out of it and drink from it every day but you should be safe as long as you are not eating it.
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  #15  
Old 2018-02-20, 12:48pm
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My reading of it is that use of arsenic improves the stability of copper slag glass, thus reducing leaching of any metals and minerals. I’d be more worried about the lead in old glass formulae than arsenic in modern glass.
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