The Different Types of Resins Available for 3D Printing

As we have seen on numerous occasions, choosing the right material is a fundamental step in additive manufacturing. This is especially important in resin 3D printing, a process in which photosensitive materials are cured layer by layer until the final, highly-detailed part is achieved. Moreover, resin choice also depends on the photopolymerization process used. On the one hand there is stereolithography, or SLA, which uses a laser to cure the material, and on the other there are the DLP and LCD methods, which use light displays. To better understand the currently available material options, we took a closer look at the types of resins you can use in 3D printing and their different characteristics.

It should be noted that resin performance is determined by the optimal polymerization induced by the curing light, which can be single or multi-wave. This is where the concept of resin wavelength comes into play. The lower the wavelength rating of the resin, the higher the light output power needed to cure it. It is for this reason that manufacturers specify a wavelength with which their resins are compatible. Thus, we understand that the wavelength of DLP/LCD resins is longer than SLA resins.

Photo Credits: Ackuretta

Standard 3D Printing Resins

As expected, this type of resin is the most generic in the list and on the market. Practically all manufacturers develop standard resins, so you can buy them anywhere, at an affordable price and with a wide variety of colors to choose from. They are a very versatile option, as they combine smooth and detailed results, with considerable hardness and simple post-processing such as painting and sanding. However, care must be taken as they are fragile and can break and crack. The accessibility and ease of use make it ideal for getting started in the world of resin 3D printing and creating decorative objects, prototyping, figurines and more.