Filtering impurities from rock salt. The natural rock salt has been ground and dissolved in warm water. All of the salt,sodium chloride,dissolves,leaving a suspension of mineral and organic impurities. These are filtered out in the filter funnel. The liquor that is collected is then evaporated leaving only the pure crystalline salt behind | |
Licence : | Droits gérés |
Crédit: | Science Photo Library |
Taille de l’image : | 4500 px × 4500 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |