If you are asking yourself, why is my resin cloudy, there are a few reasons why this happens:
Cloudy mold surface
If the mold you used to cast your resin has a cloudy surface, that same cloudy and frosty surface will impart onto your resin surface. This video explains more:
For future casings, inspect the surface of your mold to make sure it has a shiny surface.
Pro tip: just because a mold doesn’t give you a shiny surface doesn’t mean you can’t use it anymore. Simply know that you will need to do some post-curing finishing to get your resin surface shiny again.
When resin gets cold, some of the components can crystallize. These crystals can show up as gray or white streaks in your resin.
Pro tip: Store your resin in a temperature-stable environment. The bottom of a dark closet works excellent for this.
Adding water to your resin will cause streaks. You probably already know this, but did you know that moisture from extra embedments you include in the resin can be the cause of this as well? All items should be properly sealed and dried before adding to resin.
Pro tip: Glue that is damp will leave white streaks. Give it hours to days to thoroughly dry before including in resin.
You incompletely mixed resin and hardener together
It’s not unusual for resin and hardener to show streaks when first mixing the two together. These should go away the more the mixture is combined.
Pro tip: I like to mix my epoxy resin and hardener together for about two to five minutes, depending on the pot time and volume of the resin I’m mixing. Not only does blending for this long remove streaks, but it also makes sure there aren’t any sticky spots after the resin cures.
So, after asking yourself why is my resin cloudy, you may be wondering how you can fix it. Here’s how to fix cloudy resin.
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