Looking at the picture, the vat may be salvageable if you can get the base layer off. You need to do so using something like a plastic razor scraper that can gently separate the base layer off the film. You can see how I do this (in a smaller example) in this youtube video: https://www.youtube.com/watch?v=dwMV0GWRWzY
When you say “bronze resin” which manufacturer and type of resin are you referring to? Do you mean 3DM Cast? Or is that one of the SPOT-A resins you have? I can’t quite tell from the label.
The remnant of the attachment layer that you’re showing in your picture seems too thick. The shrinkage from such a large attachment layer can warp the vat film. You want the attachment layer to be fairly thin (0.1 to 0.3mm, I actually always go with just 1 layer of whatever layer height I am printing).
Another possibility is that the zero level for your bed is too far away from the film. That will result in the first layer being too thick. You need to make sure that when you set the zero level, the build plate is touching the vat floor.
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James Kao.
