Technology
Stereolithography (SLA)

Key Features
- A laser beam draws the shape of the bottom slice of a designed model on the surface of a tank of resin.

- The laser-struck part of the top resin layer turns into a solid plastic film (about 0.05mm-0.15mm thick), becoming the bottom slice of the model, which rests on a movable platform known as "elevator".

- The elevator, together with the bottom model slice, descends in the resin bath to allow new liquid resin to rise to the surface.

- The process is repeated with the new liquid surface, except that the laser beam this time draws the second lowest slice of the model, forming the second lowest slice just above the bottom slice.

- The process is again repeated until the entire model has been built.

- SLA can be used to build complex product models requiring a high degree of dimensional precision, and is suitable for prototyping various products such as electrical appliances, toys and jewellery.

Contact Person
Mr Lam Ng
Tel: (852) 2788 6335
E-mail: lamng@hkpc.org