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How to Cure 3D Print in Water?

Published in 3D Printing Curing 2 mins read

To cure your 3D print in water using the underwater curing method, you place the print in a transparent container filled with water and expose it to UV light from the sun or a UV lamp.

Understanding Underwater Curing

Underwater curing is a technique used to post-process resin 3D prints. When resin prints are exposed to UV light in the presence of oxygen, oxygen inhibition can occur, resulting in a slightly tacky or under-cured surface. Submerging the print in water during curing helps to block oxygen, allowing the UV light to more effectively cure the outer surface of the print fully and evenly.

How to Cure Your 3D Print in Water

Based on the underwater curing method, the process is straightforward:

  1. Prepare the container: Get a transparent container (like a glass jar or clear plastic box).
  2. Add water: Fill the container with water.
  3. Place the print: Carefully place the part into a transparent container filled with water.
  4. Apply UV light: Then place the container outside in the sun or expose it to a UV lamp. The UV light will penetrate the water and cure the resin print.

This method is noted to take less time compared to traditional air curing methods for achieving a fully cured surface.

Benefits of Underwater Curing

Curing resin prints submerged in water offers several advantages:

  • Reduces Oxygen Inhibition: Water acts as a barrier, preventing oxygen from interfering with the UV curing process on the print's surface. This helps achieve a harder, less tacky surface finish.
  • Faster Curing: As mentioned, it often takes less time than traditional curing to achieve a complete cure.
  • Improved Surface Finish: Can lead to a smoother, less sticky final product.

What You Need

To cure your 3D print in water, you will need:

  • Your post-washed 3D resin print
  • A transparent container
  • Water
  • A source of UV light (Sunlight or a dedicated UV lamp)

By following these simple steps, you can effectively cure your 3D prints underwater for potentially faster and improved results.