Magnesium Sulfate, Epsom Salts
Colorless transparent crystals that are easily dissolved in water. Magnesium sulfate is commonly used in ceramics as a flocculant. It thickens and gels suspensions by electrostatically charging particles so that they attract each other more. This not only suspends them in the slurry but makes them stay put on non-porous surfaces (by virtue of the gelling mechanism). Even slurries containing no clay particles can be flocculated using this material.
Chemical Formula: MgSO4
Synonyms: Magnesium Sulfate, Epsom Slats