Draping a box

[Viau]

I have a project for a client. It Is a fused glass box. The box Is 7″ wide by 5″ long, 3″ high.

Glass Is 3mm coe.96. The bottom cracked twice.

I did cut the corners pieces out to have scare corners.

My drape base Is made with fiber board ( 5″ x 7″ x 1″) on posts.

Here my firing record: ramp.       T temp.  Hold

1…..400.         1000.     20

2…..400         1200     15

3…..9999        960       60

4……300         100       00

By the time it reach 1000 deg. The bottom Is cracked. I did rounded out the inside corners.

My intention is to tack fuse a 2mm  clear glass at the bottom and to change the drape firing with

Ramp            Temp       Hold

1…….200………700………15 mi

2……200………..1000…….15

3…..200…………1200…….15

4…..9999………..960………60

5…..200………….700……..15

6…..200………….100………00

Do you think that it Is acheivable to make a glass box by using  drape former?

 

 

 

 

 

[Viau]

I realise that the glass was at 10″ from the lid élément.

Maybe the temperature on the surface of the glass Is not even because the glass Is to far from the lid. So the side Is warming up faster than the center of the surface?

[Stephen Richard]

If the glass is broken at 1000F, then the rate of advance is too fast.  Remember the glass on the supports will be cooler than that which is suspended.  Slow the rate of advance.

Stephen Richard

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

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