Friday, April 6, 2018

How to Clean Your Resin Mixing Cups

I'm an advocate for always using clean, NEW cups and utensils when working with resin. It helps eliminate a possible source of contamination that could ruin a resin pour.

But if your budget is tight, or you're running low on cups, you might decide you need to re-use your measuring cups. And if that's the case, then here are the steps you'll need to take to clean them so that they can be re-used. N.B. This will only work if you use Polyethylene or Polypropylene plastic cups (because resin doesn't stick to these kinds of plastics). 

If you're curious, these are the three types of measuring cups I use all the time in the studio: 
1oz (30ml) cups
8oz (250ml) cups;
100ml silicone cups

And here's what you'll need to clean them:
Acetone
Toilet tissue

How to Clean Cured Resin from your Cups

Make sure that the resin has cured to the point where it is solid. I find it easier to remove once it has hardened but it doesn't have to be completely cured. Soft resin can still be removed as long as it is past the gel stage. If you leave the stir stick in, that can make it easier to get started.
Graduated plastic measuring cup with leftover pink resin

Pull the stick away from the wall. My pipette removed completely because resin doesn't stick to it, but if you've used a wooden stir stick, it will be stuck in the resin. Grip the resin (or the stick) and remove the resin shell from the cup. It should come away completely.
Pulling the leftover cured resin away from the walls of the plastic measuring cup.

Although the resin shell has been removed, there is still resin inside the cup that needs to be removed. Sometimes, you'll find that there is some unmixed resin where the walls meet the bottom of the cup.
Empty graduated measuring cup alongside cured shell of resin removed from the cup

Pour some acetone onto the tissue and wipe the inside of the cup, making sure that you remove any cured resin that's still on the walls of the cup. Pay particular attention to the bottom of the cup where the unmixed resin might be. If you leave any behind, it WILL cause problems with the next batch of resin you mix. Take a clean piece of tissue and clean it a second time.
Cleaning the walls of the measuring cup with a wad of soft tissue

And that's it. Now your cup is ready for re-use.
Plastic measuring cup ready for re-use.

You can see how to do it in action in this video:


Pin this tip for later!
How to Save Money by cleaning and re-using your resin measuring cups tutorial sheet

How to Clean your resin cups for re-use tutorial sheet

Resin Tip No. 3 - "Cleaning your graduated resin measuring cups for re-use" tip sheet


'Til next time.....








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