Scummy Black

[shaz]

Can black go scummy?.  I have made 2 beads both focals and I dont know if its because they were in the heat too long, but they have a scummy look to them is that possible? or is it someother reason? thanks

[Jolene]

What make of glass is it? Did you clean it before you used it? What kind of torch do you have? Got a picture?

I have not had experience of any of the standard black glasses scumming - anyone else?

[Josephine]

I had a batch of black vetro that pitted really badly. Not had scum on black though.

[Les]

I don't know about scummy black, but as has been mentioned, some blacks can bubble and pit a bit.. and some don't much like being marvered too

[jammie]

When the bubbling happens in glass and it gets  tiny raised dots over it  sort of like blisters, usually I get this with frit, or red or blues, is this pitting?
Not had any problem with black though.

[shaz]

Ive not got pictures, to be honest I was that p****d off as I spent ages on them (I thought that might have been the problem) I threw them in the bin. They went a bit "cloudy" looking, it was effetre but I didnt clean the rod and I did marver a lot for the shape       But thanks for answers I may try again tomorrow

[♥♥Tan♥♥]

Are you sure it wasn't one of the silver glasses?

[helenfc]

it wasnt effetre silver black was it? that likes to pit bubble and boil...

[Shirley]

I had some Effetre black that went scummy. It developed a sort of film over it as it was being worked. Dud batch, I think, as I tried another rod from a bundle I'd bought at a different time and it was fine. I work pretty cool too, so I don't think it was anything to do with the set up. Thanks goodness it's a cheap glass!

[beadysam]

My effetre black bubbles and pits if I use graphite with it...

[stuwaudby]

I find black one of the easiest to use and least scummy, I always get a nice clean surface finish.

There was a bad batch of Vetrofond this year that was really bubbly.

Effetre do a Silver black which is impregnated with silver. It is very shockey, flashes and crackle sin the flame, leaves a silver shine on the rod and leaves a metallic silver/brown sheen on the surface.

Where did you get the rods from? Probably best to bin it and order an alternative.

[shaz]

My effetre black bubbles and pits if I use graphite with it...

Sam I think that might be what the problem was as I was using the graphite marver to shape it, I have used the black before but it didnt do this.

[beadysam]

I'm making black pendants at the moment and everytime I use my torch top marver or pick up my graphite one, it goes all bubbly and scummy.   No probs with brass though.  I try not to touch effetre black too much as it really doesn't like being messed around with, but within seconds of contact with graphite, off it goes....