I've been happily using one type of GITD additive here's a link, which was really strong, but this year I thought I'd test out some others to see how they compare. In this experiment I tested the following phosphorescent additives: Glow Worm, Europium Ultraglow, Art'n Glow, Glominex, HXDZFX Glow Powders, TechnoGlow, as well as Glomania ProFX GITD Paint, and GITD Nail Polish. Of all of these, Glow Worm had by far the strongest glow, followed by Europium Ultraglow. The GITD paints and nail polish barely glowed at all - what a waste.
I mixed in an equal amount of additive to Brilliant Resin and cast a 1" smooth circle with each. I tested the basic white/yellow-greens, as well as some colored options. Some of the powders sunk to the bottom while others stayed suspended.
For the paints and nail polish (at the bottom of the board), I painted a thick layer on top of a clear cast piece. They all appear pretty whitish in daylight.
After 10 minutes charging in the sun, here's how they look in the dark. It's hard to tell here, but while the top row looked about the same in daylight, the Glow Worm (top left) had a much stronger glow than the others. The greens and aquas all looked similar and all glowed pretty well, and I do like the purple/blue ones in the last row, their glow wasn't too strong but they were pretty. The paler blues, the "pink" and orange were pretty ugly and looked much duller than in this photo.
And here's how they looked after 1 hour in the dark, I hoped they would glow longer, but they do recharge quickly.
They look really pretty and colorful in the daylight while they still have a bit of glow but they dull back down to the way they looked in the first image pretty quickly.
Pricing and available container sizes vary, but you can get a small amount on Amazon for just a few dollars. The stronger the glow, the more expensive it'll be.
Here's a bangle bracelet we cast in our Double-Sided Square Mold, using Black Resin Colorant along with GITD powder mixed into Brilliant Resin:
I love this aqua colored glow-in-the-dark, a whitish powder I mixed into Brilliant Resin. The graphics were printed on our Clear Photo Film and cut into different shapes, domed with resin on both sides, then drilled for jewelry findings.
Here's a simpler version, with just the creepy spider drops:
This piece can be made with or without the GITD layer, but looks entirely different from day to night.
Hop over to our Resin In Bezels post for more details.
And more in the traditional bright yellow-green:
Here's another using an image copied onto Clear Photo Film, this one's in color and domed on both sides. On the back I added GITD Powder, and embedded a pin into the resin as it was setting. It looks very different from day to night.
Again, here's a link to the Glow Powder I used which was really strong, but try to find a smaller container for sale or you'll have enough for a lifetime.