White salt, rock salt and black salt - all three come ... Kala Namak (Black Salt) Kala Namak is light pink or dark brown in appearance. Its taste is slightly pungent and the smell is strong ...

Which brings us tot he story which has come our way today, the suggestion that something as simple as rock salt could triple the energy density of a lithium-ion vehicle battery. The research led ...

But extracting the coveted salt means descending into dark caves, then blasting and carrying heavy rock. Faizan Panjwani: The problem is the massive size of the blocks that come from the mine.

M. Margneritte, of Paris, well-known as a distinguished chemist, has discovered a valuable mode of purifying rock and sea salt. The latter is, for the most part, delivered for consumption in such ...