Why does my resin print have white residue?

Resin 3D prints get white residue on them from being cleaned in a liquid solution that has thin particulates of slightly hardened resin. Another reason could be from curing a resin print that isn’t completely dry and still has isopropyl alcohol on the surface. You should dry your resin prints before curing them.

What percent alcohol cleans resin prints?

Note: Most Formlabs resins can be washed in IPA with a concentration of 90% or higher. Biocompatible Formlabs resins require IPA with a concentration of 96% or higher. Isopropyl alcohol is a highly-volatile, flammable, colorless, clear liquid with a strong smell.

Is 70% IPA good for resin?

The benefit of using 70:30 alcohol to water ratio is that it’s gentle on skin and floors around the house. The negative of using that ratio for 3D printing is that it doesn’t clean the resin well enough. I do not recommend using 70% IPA in 3D printing. So that leaves 91% and 99% IPA.

Can I use rubbing alcohol to clean my resin prints?

You can clean your resin prints without isopropyl alcohol using many alternatives. People use products such as Mean Green, Simple Green, Acetone, Ethanol, Denatured Alcohol, Rubbing Alcohol (70% Isopropyl Alcohol), Mineral Spirits, Mr. Clean, Evergreen, and more.

Does rubbing alcohol pop resin bubbles?

You can use alcohol spray for resin bubbles. Fill a spray bottle with rubbing alcohol and spritz the surface of the resin. The alcohol breaks the surface tension causing the bubbles to pop and you’ll see the bubbles pop right before your eyes.

Can you put alcohol in resin?

You can mix a little alcohol ink into your resin for transparent color, but results vary, and if you add too much it will affect resin set-up.

When should I replace my IPA resin?

Formlabs recommends replacing IPA when its resin concentration reaches around 10–12%. Testing indicates that parts may start to feel tacky when the IPA’s resin concentration reaches 5–10%.

How do you remove white residue from resin prints?

Try rinsing the print in water before post cure. The alcohol bath doesn’t destroy the uncured resin, it just dissolves it. The resin goes in to suspension in the IPA and over time it will cure in to tiny solid particulates.

How do you fix cloudy resin?

  1. Recoat with a layer of doming resin.
  2. Apply a couple of light layers of resin gloss sealer spray.
  3. Sand the surface and buff it with a resin polishing kit.
  4. Make sure your inclusions are completely dry before adding to the resin.
  5. Warm your resin kit before using it.

How do you make resin clear again?

  1. Step 1: Wet sand your part. TIP:
  2. Step 2: Use acrylic cleaner on cork board.
  3. Step 3: Polish part with a microfiber cloth.
  4. Step 4: Finish with acrylic spray (optional)
  5. Step 5: Check the transparency of the final part.

How do you fix cloudy resin after sanding?

Applying a clear gloss after sanding

What happens if you dont cure UV resin?

Yes, it’s possible to over-cure a print, so it pays to keep an eye on how long your job has been exposed to UV light. By over-curing a print you can cause it to over-harden, which will weaken its structural integrity and cause it to become brittle. It’s a great way to flush hours of work down the drain.


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