How to Wash and Cure Resin Prints?

If you are new to the world of 3D printing and have just started experimenting with resin printing, then you must know the importance of post-processing. Washing and curing resin prints is an essential part of post-processing, and it can make or break the quality of your final output. In this article, we will discuss how to wash and cure resin prints to achieve the best possible results.

What is Resin Printing?

Resin printing is a type of 3D printing that uses a liquid photopolymer that hardens when exposed to UV light. The printer uses a light source, typically a UV laser or LCD screen, to selectively cure the resin layer by layer, creating a solid object. Resin printing produces high-quality prints with fine details and smooth surfaces, making it an ideal choice for creating complex models, jewelry, and other intricate objects.

Why is Post-Processing Important for Resin Prints?

Unlike Fused Deposition Modeling (FDM) printing, where the printed object is ready to use right off the printer, resin prints require post-processing to remove uncured resin and harden the printed object. Post-processing includes washing and curing the printed object. If you skip post-processing, the printed object may be brittle, sticky, or have un-cured resin residue, which can affect the final quality of the print.

How to Wash Resin Prints?

Washing resin prints is the first step of post-processing. The goal is to remove any uncured resin from the surface of the printed object. Here are the steps to follow:

Step 1: Remove the printed object from the build plate using a spatula or scraper. Be careful not to damage the object’s surface.

Step 2: Fill a container with 99% isopropyl alcohol (IPA) or a specialized cleaning solution designed for resin prints. The container should be large enough to submerge the printed object completely.

Step 3: Submerge the printed object in the cleaning solution and agitate it gently for 5-10 minutes. Use a soft-bristled brush to remove any stubborn resin residue if necessary.

Step 4: Remove the printed object from the cleaning solution and rinse it thoroughly with clean water. Be careful not to touch the surface of the object with your bare hands, as it may leave fingerprints.

Step 5: Pat dry the printed object with a lint-free cloth or paper towel. Do not use a hairdryer, as it may cause deformation or cracks in the object.

How to Cure Resin Prints?

Curing resin prints is the second step of post-processing. The goal is to harden the printed object and ensure that all the resin has been cured. Here are the steps to follow:

Step 1: Place the washed and dried printed object in a curing chamber or a UV light source. The curing chamber should have a wavelength between 405-420 nm, which is the optimal range for most resin types.

Step 2: Set the curing time according to the resin manufacturer’s specifications. Usually, it takes 5-10 minutes to cure the object completely.

Step 3: Check the object’s surface for any uncured resin residue or defects. If you find any, repeat the washing and curing process until the object is perfect.


Washing and curing resin prints is an essential part of post-processing, and it can significantly impact the final quality of the printed object. By following the steps mentioned above, you can ensure that your resin prints are properly washed and cured, resulting in high-quality, durable, and visually appealing 3D prints.

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