a) Billets are relatively free of bubbles as opposed to stacked fused sheet glass. This creates cleaner “windows” in the slab. Stacked sheet glass, however, will work just fine if you use it.
b) While the proportions may be off a little bit, the attached drawing shows the general layup of the billet piece in question and how the flow was generated. Remember that the slabs are subsequently butterflied and fused together to create the symmetrical repetition.
Those billet chunks were cut on a saw, in approximately 1.5” wide strips. They were then laid on top of the stack going the whole way down the length of the strips of stacked sheet glass.
Hope this helps.
It is not critical to do the project exactly the same as the one in the video--you might find the results of any variations you try quite rewarding!
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