3D Printing Process

Stereolithography Apparatus

Stereolithography produces 3D printed parts by using a high powered laser to harden a photosensitive resin into 3D solid plastics.

eMachineShop offers 3D printing of metal materials whether you need a one off prototype or a large production order.

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What is Stereolithography Apparatus?

Stereolithography Apparatus (SLA), also called stereolithography, optical fabrication, photo-solidification, or resin printing, is a common 3D printing process that uses a high powered laser to flash harden a liquid resin into the desired shape. A tank is filled with a liquid resin, usually a clear, liquid plastic. The laser draws each layer, instantly solidifying the resin where it makes contact. This process continues along each horizontal cross-section until the part is complete.

After the part is finished, and the excess resin is drained, the part is heated in a UV oven to be cured. This allows the part to become more sturdy and stable.


  • One of the most precise 3D printing processes.
  • Tight dimensional tolerances.
  • Smooth print surfaces.
  • Part volumes can be large without losing precision.


  • Optics and covers.
  • Molds and casting patterns.
  • Display models.
  • Mechanical parts.

Materials Offered

a lot of copper tubes on a rack
Acrylate Photopolymers


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