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Thanks to everyone for their input,I fused the slumped piece flat, I fused at 400 to 1050 held for 25min.,250 to1250 held 10min.,400 to 1400 held 5min. There is no variation in the thickness,and no apparent change in size,at least that I can see.However ,there are the slump marks on the back(bottom)...

I appreciate the input.
I will refuse flat rather than in the mould,and go relatively slow
and expect (exactly) what everyone said!!!!
Mahalo.......
Mike

I have been told that I probably shouldn't re-fuse a piece flat,that has been fused & slumped(variations in thickness issue).Can I fuse to about 1400 to fire polish in the orignal
mould without any thing weird happening,What should I expect?
Mahalo.....Mike

Thanks All,
Tony maybe I should have used the word perspective not depth.
At any rate on one of the pieces,I am able to use clear resist and overlay
what little is left showing (as I had said the work was barely visible) and
re-etch over the top of that .
Mahalo.......Mike

Erik,
A straight surface etch is done by pulling all of the pieces of the cut design at once and blasting,as opposed to shading, in which the piece is given depth by sequentially pulling the pieces of the resist(design) ,starting with the front most perspective.
Hope that helps...........Mike

Thanks Tony,
I use a plotter and this design has a lot of detail,some pieces are less
than a 1/4" wide, even though the slump is only about 1" deep(round cornerd square) My plotter won't cut that.
Mahalo........Mike

I had two nicely fused pieces of Spectrum that I etched designs on(actually shaded) and slumped to 1250 and held 12 min.I lost all of the design( barely visible) Thats history,I learned a lesson.My question is now that they are slumped I cannot apply a resist to the slumped shape .Should I re-fuse t...