Misty coat when batch annealing

[noora]

When I batch anneal the beads in my kiln, they get a misty coat of residue of some kind. It's like a thin layer of fog or soot all over the bead. It wipes off easily, so it's not a problem. I'm just curious where it comes from and what it is. Is it normal? Does it have something to do with the fiber paper perhaps?

[Kaz]

If it is a brand new kiln, this is normal and should just wash off or come off with Cilit Bang Lime and Grime. It will stop fairly quickly. If it is not a new kiln then I am not sure and others may have an answer.
Kazx

[noora]

I've had it for over a year and fused glass in it several times so it should be well burned in by now. I've never noticed anything like that when fusing glass or firing PMC, but then the temperatures are different.

The mist comes off with plain water, so it's not a real problem. I'm just curious to know what it is

Maybe I should get the thick reusable fiber paper for annealing beads.

[Flyingcheesetoastie]

I don't know about Thin-Fire paper but most ceramic fibre needs to be pre-fired to quite a high temperature to burn off the binder inside it before use.  It could be this binder that is creating the residue if you are using new fibre paper?

[Trudi]

Maybe I should get the thick reusable fiber paper for annealing beads.

If I batch anneal I just put the beads on an old tile - I don't use fibre paper - maybe it's the paper but I wouldn't have thought so???