I cooked these up for something to do today.
The backs of these baits are done in either black or purple and have been brush coated with color shifting pearl powder as a finish coat then dipped in clear plastic to seal the pearl powder and the eyes.
I should do a short video of these just walking from outside where the picture was taken back into the garage and work room….its hard to imagine what the colors do without actually seeing them shift. That might be tomorrow’s project since the sun is supposed to be shining.