First time I'm trying to do an epoxy pour. It's for a cutting board for my doctor. BTW, nice thing to do to give your family practice doctor a little present. Just sayin...

Anyway, back to the issue. I poured a test piece of epoxy with dye, using blue, but adding some additional white dye in epoxy for a swirl. When I finished pouring, the swirl looked nice. Wish I had taken a picture of it to show the before.

But over the first 24 hours, this is what happened to it:
Epoxy Pour.jpg

Any ideas why this happened? What happened to the swirls?