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annealing question

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annealing question

Postby ruthysuss » Thu Jul 19, 2018 3:36 pm

I have a schedule for fusing three layers of BE assembled frit sheets 10 1/2 x 7 1/2 as follows:

1.300 1215 2.00
2.100 1490 :20
3.9999 910 2.00
4.100 750 :15
I am concerned as I am adding a fourth layer, and the size is 11 1/2 x 11 1/2. Would I have to change this schedule.
Any advice would be appreciated, I tend to stick to known schedules and not deviate but I think I may have to here.
Thank you in anticipation.
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Re: annealing question

Postby marykaynitchie » Mon Jul 23, 2018 8:47 am

Hi Ruth,

If you add a fourth 3mm layer, and you are planning a full fuse, you will have a total of 12mm thick, and the thickness of the entire piece will be non-uniform, as this last layer seems to be larger than the three previously fused layer. Therefore, because it is not an evenly thick tile, you will need to increase the annealing soak for a piece twice the thickness of 12 mm. In this case, the closest segment on the chart is for a 25mm slab, which has an annealing soak of 4 hours.

I hope this helps. http://www.bullseyeglass.com/methods-id ... slabs.html

Good luck!
Mary Kay Nitchie
Bullseye Glass Co.

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