smoky black areas in fused pieces that are Not supposed to be there.

[blnowlin]

I have the fuse works microwave kiln and I was having trouble keeping the small pie es where I wanted before firing.  I got no days? Liquid glue and the heat activated glue strips to try.  Liquid doesn’t work well for me but the strips do OK.  The problem is after firing I get smoky/ silvery black blotches in the center of the fired piece.   Is that from the glue?   How do I prevent this?  Can’t do such small pieces very well at all without glue of some kind.

[Vernelle]

The black spots could be from the glue.  I use White Rain pump hair spray as a glue and have no problem with it.

[blnowlin]

I think you’re right, that was my suspicion for sure.  The piece was pretty big and the spots were in the middle so today I cut it into two pieces.   I was hoping that refiring them cut that way would let the spots vent out of the piece.  It worked well…still small spots but I will fire them again and I think they’ll be gone.   Going to try the hairspray and make sure it can burn away and not be trapped inside..    Thanks for responding!

Barb

[Stephen Richard]

It is most often sufficient to put the glue just at the edge of the glass pieces.  This is enough to keep the pieces in place, and the glue burnout is much easier and less lilkely to leave any residue.

 

Stephen Richard

blogs at: http://www.verrier-glass.blogspot.com/ and  http://www.glasstips.blogspot.com/

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