Smokey Clear encasing Silver Glass???

[sublimekate]

I wonder if anyone else has had this??

Sometimes, not always, when heavily encasing silvered glass, such as DH Triton and the like the clear will have a smokey hue.

I don't understand the chemistry here and was wondering if someone might be able to explain.

I've been using the new effetre clear, I've got some Laucha, and the original effetre clear, neither of which I get on with, but really I should try them.

It's only happened a few times, on larger beads that I guess have been worked for longer, but I'm careful not to overheat them.

I suppose I'm wondereing if it's a chemical or a technique thing I might overcome, the clear isn't scumming or burning, but it does go smokey.

Modified to say: I'm on a nortel minor with oxycon, I thought it might be not enough oxygen?? I usually have it set at around 4, But possibly barking up the wrong tree altogether here?

You get me??  K x

[Magpie]

Silver (actual silver, not glass) sometimes discolours when encased with clear, it might be linked to that, that the silver in the glass is causing a discolouration, nope that's probably rubbish coz then no-one would encase silver glass, and for a minute there it almost sounded like I knew what I was talking about, I'll go somewhere else for a while..........

[Ilona]

I have had this happen a few times.

This bead I had worked on for quite a while so maybe this is the cause.



This was clear over Triton.

The Triton went a muddy colour too.

[Hamilton Taylor]

I think Magpie has it.
Glass with a high silver content can fume a little when heated, and if clear or a pale colour are associated, the fume can condense as a brownish or yellowish, or whitish, or hazy-bluish, 'mist'. Sliver leaf or foil, when 'melted in' to a pale colour, often does the same thing. eg brownish/yellow over white glass.) Perhaps this is the cause?

Sean

[sublimekate]

That's making sense......so is it when it's overheated then?

I should say the silver glass keeps all it's colour, iridescence etc, it's just the clear that although lovely and sparkly has a brownish tinge.

I'll see if I can find one and get a picture up.