How to make icy patterns
How to decorate photo frame for Christmas
Icy flowers on the window even if it's sweltering outside? Here’s how!
Only under adult supervision.
Equipment and reagents
- photo frame;
- 25 mL boiling water;
- 50 g urea.
Combine 25 mL boiling water and 50 g urea in a glass. Use a brush to apply the resulting mixture to the glass insert of a photo frame. Let dry.
Urea is an organic compound also known as carbamide or diamide of carbonic acid. It is highly soluble in water: at 20 °С (68 °F), approximately 108g of urea can dissolve in 100mL of water. When heated, urea’s solubility increases, meaning that more of it can dissolve in a smaller volume of water. When the solution cools, some of the urea precipitates, returning the oversaturated solution to a saturated state. When applied to a surface, the water evaporates and the urea starts to crystallize. With time, only urea crystals are left on the glass insert. Urea crystals have a needle-like structure and look like frost.
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