CSWA Additive Manufacturing Practice Exam – Prep, Practice Test & Study Guide

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What type of light is the resin used in an SLA printer sensitive to?

Visible light

Infrared light

UV light

The resin used in an SLA (Stereolithography Apparatus) printer is specifically formulated to be sensitive to ultraviolet (UV) light. In the SLA process, a UV light source is utilized to cure or harden the liquid resin layer by layer, allowing for the creation of three-dimensional objects.

The chemical composition of the resin includes photoinitiators that absorb UV light and initiate a polymerization process, effectively transforming the liquid resin into a solid material. This characteristic allows SLA printing to achieve high levels of detail and precision, making it a popular choice for applications requiring intricate designs.

While visible light, infrared light, and X-ray light serve various purposes in different applications, they do not effectively initiate the curing process of the resin used in SLA printing. Therefore, UV light is the key component that enables the functionality of SLA technology.

X-ray light