👉 The copying fluid, also known as the photopolymer or light-sensitive fluid, is a key component in advanced 3D printing technologies like stereolithography (SLA). This fluid is a liquid that solidifies when exposed to light, typically ultraviolet (UV) light. The process begins with a vat of this fluid, where a layer-by-layer, precise pattern is projected using a laser or digital light projector. As the UV light selectively cures (solidifies) the exposed areas, the fluid hardens into a solid, layer by layer, building up the 3D object. Once the desired structure is formed, the uncured fluid underneath remains liquid, allowing for subsequent layers to be printed without interference. This fluid's ability to rapidly and accurately solidify under light control enables the creation of highly detailed and complex 3D objects with excellent precision and surface finish.
