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Crystal Frost Window Paint

Homemade Crystal Frost for your Windows

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You can "frost" a window with Epsom salt crystals, even when it's hot outside.

Anne Helmenstine
Grow non-toxic crystals on your window that look like frost. These easy crystals grow in a few minutes and give you the effect of frost, even if it's warm!

Crystal Frost Materials

  • 1/3 cup Epsom salt (magnesium sulfate)
  • 1/2 cup hot water
  • few drops liquid dishwashing detergent

Prepare the Crystal Frost Paint

  1. Dissolve the Epsom salt in the hot water.

  2. If the salt doesn't completely dissolve, microwave the solution for about 30 seconds.

  3. Add a few drops of liquid dishwashing detergent. The detergent helps make the crystals easy to wipe away when you're done with them.

  4. Use a paper towel or rag to wipe a window with the solution. Crystals will form in a matter of minutes.

Helpful Tips and Tricks

  • Make certain the Epsom salt is dissolved. If there are salt grains in the solution then the window will have uniform crystals rather than random-looking "frost".

  • Use your finger to "write" on the window. The invisible text will act as a center for crystal growth, producing an interesting effect.

  • Other smooth surfaces work well. Try a mirror, a metal pan or a translucent plate.

  • When you're done with the frosted window, you can wipe it away with a damp cloth.
View a video of this project, including time-lapse photography of crystal growth.

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