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An inverted stereolithography machine begins a print by decreasing the build platform to the touch the underside of the resin-filled vat, then transferring upward the peak of 1 layer. The UV laser then writes the bottom-most layer of the specified half via the clear vat backside. The UV laser then writes the second-from-bottom layer and repeats the method. An advantage of this bottom-up mode is Hats for Women that the build volume could be much bigger than the vat itself, and only sufficient photopolymer is required to keep the underside of the build vat constantly filled with photopolymer.
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