Tack Fuse on top of 12″x12″ 1.5″ thick glass

[pegielynch]

I just finished fusing a Spectrum 96 compatible glass 12″x12″ 1.5″ thick piece and want to tack fuse an accent piece on the top.  The top piece will be a 9″x5″ oval made of 2 fused pieces.  I’m struggling to calculate the proper segment lengths.  The original fusing took almost 2 days.  Any insight would be welcomed.

[Stephen Richard]

You are trying something difficut.

I suggest (in degrees F)

11/hr to 510 no soak, 17/hr to 1000.  Start checking from about 600, as there will be a lot of heat work put into the piece by this time.  It might even be tack fused at a lower temperature.

Anneal cool should be on a slower schedule than previously, as the tacked parts will try to pull away from the big block.

So I suggest 3.5 days for heat up and 2 days for cool down to be sure everything is secure.

Is there another way you can do this?

 

Stephen Richard

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

[pegielynch]

Thanks for the response. Your calculations are similiar to what I was coming up with so I guess I’m on the right track.  I was seriously considering just creating the separate piece to a ‘finish’ and then attaching it with glue instead of going through this process which could end of in catastrophe.  Giving it some thought…

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