I’ve heard mixed experiences with using yellowing epoxy. I have heard it won’t cure or will only get deeper yellow when cured. But, I also read the opposite — that it gets less yellow when cured. So, having some 1:1 epoxy resin with yellowed hardener on hand, I thought I would test it out.
This is my epoxy resin with the very yellow hardener getting mixed:
I used my favorite ghost mold for this project. I wanted the resin to cure thick so I could appreciate the color.
Here they are cured. Both the ghost castings with colors are perfect. No trace of a yellow tone at all, and they dried perfectly. As expected, the clear epoxy resin casting stayed yellow. It didn’t appear to get darker or lighter than before casting.
This was a fun experiment, and it’s good to know that I can still use yellowing epoxy.
What can you do to prevent yellowing epoxy? Here’s how you should be storing your epoxy resin.
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Originally written by by Penny Reid
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