Water washable resin is a type of 3D printing resin specifically formulated to be soluble in water, making the cleaning process after printing significantly easier and more convenient compared to traditional resins. Instead of requiring isopropyl alcohol (IPA) or specialized cleaning solutions, you can use tap water to remove uncured resin from your prints.
Key Characteristics of Water Washable Resin:
- Water Solubility: This is the defining feature. Uncured resin dissolves in water, simplifying post-processing.
- Easier Cleaning: Printed parts and the printer itself can be cleaned with water, reducing the need for hazardous and costly solvents like IPA.
- Reduced Odor: Some water-washable resins have a lower odor compared to traditional resins.
- Similar Printing Properties: Water-washable resins generally offer similar printing characteristics (resolution, strength, etc.) to standard resins, though this can vary between brands and specific formulations.
How it Works:
The chemical composition of water-washable resin is what allows it to dissolve in water. This typically involves incorporating water-soluble monomers or components into the resin formulation. When the printed part is submerged in water, the water molecules interact with these components, breaking down the bonds and allowing the uncured resin to be washed away.
Using Water Washable Resin:
- Printing: Print your 3D model as you would with any other resin, following the manufacturer's recommended settings for your printer and resin.
- Washing: After printing, remove the part from the build plate and submerge it in a container of water. Gently agitate or use a soft brush to remove the uncured resin. You may need to repeat this process with fresh water.
- Curing: After washing, ensure the part is completely dry. Then, cure the print under UV light as you would with traditional resins to achieve its final hardness and strength.
Important Considerations:
- Water Disposal: The water used for washing will contain uncured resin, which is harmful to the environment. It should not be poured down the drain. The proper method for disposal involves curing the resin-contaminated water with UV light and then disposing of the solidified resin as solid waste. Some local regulations may have additional requirements.
- Water Quality: While tap water is generally suitable, using distilled or deionized water can improve cleaning effectiveness and reduce the risk of mineral deposits on your prints.
- Resin Brand and Type: Always refer to the manufacturer's instructions for specific washing and curing recommendations, as they can vary between different resins.
- Potential for Swelling: Prolonged exposure to water can cause some water-washable resins to swell or warp. Follow recommended washing times.
In conclusion, water-washable resin offers a convenient alternative to traditional resins by simplifying the cleaning process with the use of water. Proper disposal of the resin-contaminated water and adherence to the manufacturer's guidelines are crucial for safe and effective use.
