how do resin printers work?
In: Technology
It’s called [stereolithography](https://en.wikipedia.org/wiki/Stereolithography) or SLA.
You have a big tank full of special resin which cures solid when exposed to a particular wavelength of light (usually EV) and the bottom of the tank is transparent. The print bed starts at the very bottom of the tank, and a computer-controlled laser shining from below draws out the first layer of the model, causing the resin to solidify in that shape. Then the print bed is raised by one layer increment, and the laser draws the next layer. This repeats until all of the layers have been drawn out and the model is complete.
Most resin 3d prints then must be washed of excess liquid resin and then given additional curing time in a UV chamber.
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