Separating salt from rock salt. Person crushing rock salt in preparation to separate the salt from its impurities. Once crushed,it is added to warm water to dissolve the salt. The solution is then filtered to remove any insoluble impurities and heated gently to evaporate off the water. This will leave the pure salt behind | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Trevor Clifford Photography |
Taille de l’image : | 5119 px × 3425 px |
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