Del Sol Knock Out

This is a polish from Del Sol, which makes colors that change in the sun. In the shade, Del Sol Knock Out is a very pale, beige-ish light pink. In the sunlight, it turns a medium pink color. Knock Out has the tiniest bits of shimmer but they're effectively invisible. The color is pretty but unfortunately the formula was very sheer and quite streaky. It took 4 coats to reach full opacity and evenness. The color change happens only in direct sunlight (I'm guessing the mechanism utilizes UV radiation) and returns completely to the light color within a minute when I go back in the shade. Also, Knock Out started chipping right after I took a shower so....not so great on that part. The first time I wore it, entire chunks would just fall right off but I thought it was just because I didn't use base coat or top coat. I guess it's just the formula, though, since I did use base coat and top coat for this mani but a huge chunk chipped off the middle finger anyway. Unfortunately, the weather was really dreary when I wore this so I have no color change shots on my actual nails.

Chip-a-palooza

It's supposed to turn the color of the sticker in sunlight.

Left: Color of bottle before prolonged sun exposure
Right: Color after direct sun exposure for about 30 seconds

It's quite pink now.

Here you can see the left half of the bottle changing back to the light pink color, while the right side is still darker pink.