Stereolithography uses a vat of resin with an elevator style platform and a UV laser to harden each layer of the desired prototype at a time. First, we use software to correctly position the part, then sufficiently cover the down-facing planes of the part with supports. The platform begins one layer thickness below the top of the resin (usually about .002" to .004" thick. The laser beam traces that layer onto the resin, instantly curing adnd hardening it. The platform is then lowered another layer thickness, and the process repeats, fusing each subsequent layer to the previous one. Once all layers are complete, the elevator rises and the part can be removed and cleaned of excess resin in a solvent. Once dry, it goes into a UV chamber to be fully cures, then any post processes can take place.
