Stereolithography (SLA)

SLA is fomous for being the original 3D printing technology. The process uses mirrors, known as galvanometers or galvos, (one on the x-asis and one on the y-asis) to rapidly aim a laser beam across a vat, the print area, curing and solidifying resin as it goes along. This process breaks down the design, layer by layer, into a series of points and lines that given to the galvos as a set of coordinates. Most SLA machines use a solid state laser to cure parts.

Bottom - up (Desktop) SLA

405 nm

Top - down (Industrial) SLA

355 nm


Selective exposure tolight by projector
Selective exposure to light by laser

If parts of very high accuracy or smooth surface finish are needed, SLA is the most cost-effective 3D printing technology available. Best results are achieved when the designer takes advantage of the benefits and limitations of the manufacturing process.


SLA Technology is the best for:

Detailed large prints

Advantages of SLA Technology

Bottom-up (Desktop) SLA
Top-down (industrial) SLA
+ Lower cost
+ Widely available
+ Very large build size
+ Faster build times

Partnership based on trust: BASF collaborates with these SLA experts: