Do you know what happens when you add food coloring to ice and table salt?
Not only do you get a beautiful bowl of colored, fast melting ice; but you can experience iridescence if you use the right pigment. I’m not going to tell you which pigment causes this effect. You’ll have to try all of them to see for yourself. Of course, you can kind of tell in the pictures below, but try it and see if you are right.
primary food colors
neon food colors- if you can only get one pack, get the neon
*I HIGHLY suggest using both types of food coloring, it’s the best way to discover the pigment that causes the iridescence
1. fill a bowl with ice
2. sprinkle (or pour, try different amounts) table salt onto the ice
3. add drops of food coloring onto the salt
4. you get instant results with some of the colors, no results with some, and have to be a little patient with one color
Don’t dump the ice when you are done, let the ice melt down and see what happens to the iridescence. Enjoy!