A subcategory of vat polymerization, SLA 3D printing technology uses a laser to solidify, or cure, each thin layer of liquid resin deposited onto the build platform at the top of the resin tank. During this process, the laser traces or draws the design of the part in each layer.
The average layer height is around 100 microns, with a minimum of 25 microns. Famous for accuracy and precision, SLA 3D printing also offers strong adhesion between layers, resulting in good structural integrity for parts.
Since its inception and consequent patenting in 1984, SLA 3D printing still reigns very close to the top of the additive manufacturing hierarchy—superseded only by selective laser sintering (SLS)—another one of the primary forms of 3D printing created in the 80s, and formidable due to greater design freedom in creating complex geometries, and tough parts.
Originally intended for engineers and designers to enjoy as a tool for rapid prototyping, SLA 3D printing still serves its original purpose with ongoing appeal and momentum, due to the following benefits:
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