【3D Printing Applications】Resin 3D Printing: What's the Difference in Finish Among SLA/DLP/LCD?
Which has the fastest printing speed? What are the differences in light exposure technology? Resin 3D printing technology mainly uses liquid resin as a material, filling a resin tank with resin, and then exposing it to light using a light exposure panel or UV laser. The resin hardens gradually when exposed to light, forming the object. Depending on the method of light exposure, it can be divided into three types: LCD (Liquid Crystal Display), SLA (Stereo Lithography Apparatus), and DLP (Digital Light Processing). Here's a summary of the principles of each light exposure method and a detailed look at the finished sample details:
*Click on the sample images to see the production process!
LCD resin 3D printing uses a liquid crystal display to expose the resin to LED light, gradually hardening the liquid resin. During printing, the LCD panel blocks some light, and only the necessary parts are exposed to the photocurable resin. This process is repeated layer by layer to cure, and finally, the finished product is built up. (Click here for compatible models)
SLA resin 3D printing technology uses a concentrated UV light to harden photocurable resin. It's a type of resin 3D printing technology that "draws" solid objects with light. Once a layer is formed, the print platform lowers by one layer and submerges back into the resin tank. This process is repeated to complete the part. (Click here for compatible models)
．DLP (Digital Light Processing)
DLP hardens photocurable resin using light projected from a digital projector. The digital image for each layer is composed of square pixels, and the finer the pixels, the higher the quality of the print. Because the projected light can be directly applied to the entire print platform, it allows for faster print speeds. (For compatible models, please contact us)
| Print Speed | LCD≈DLP＞SLA |
| Cost | SLA＞DLP＞LCD |
| Surface Accuracy | Depends on the laser spot or panel pixel size |
Resin 3D printing is suitable for producing complex parts and models, and the surface of the finished product is smooth with almost no visible layer lines from material stacking. It is very suitable for producing small and medium-sized assembled parts, combined components, and models, and is widely used in fields such as dentistry and jewelry. The finished products can reproduce high-precision details, and a wide variety of resin materials are available. There are functional resins for different applications, such as castable, high-temperature resistant, high toughness, and transparent, and colors can also be selected according to needs.
The three types of resin 3D printing—SLA/DLP/LCD—share very similar basic principles. Which method do you prefer? Share your thoughts with us! 3DMart offers more than just 3D printing. Contact us now to learn more about the various applications of resin 3D printers and detailed equipment information.
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