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Rock Salt - What Is It?

Rock Salt - What Is It?

Rock Salt is the common term for Halite, a mineral that crops up after enclosed lakes and seas evaporate - these vast salt beds can literally be hundreds of metres deep. Here in good ol' Blighty we have three huge salt mines, the biggest being in Winsford which produces about a million tonnes of grit salt each year (except for that one time that they ran out completely and Dandy's managed to create an alternative product to keep the whole of the UK going - more on that later).
How Does Rock Salt Work?

How Does Rock Salt Work?

If you live in an area of the UK which traditionally has cold and icy winters, you have probably experienced rock salt on pavements and roads, used to melt the ice and snow and keep it from refreezing. Rock salt is also used to make homemade ice cream! In both cases, the salt works by lowering the melting or freezing point of water. The effect is termed 'freezing point depression'.
03, October, 2016 by Katie de Winton