Dead Sea 342 parts per thousand (in 2002), and a temperature that swung between and . Underneath a zone of transition, the lowest level of the Dead Sea had waters of a consistent temperature and complete saturation of sodium chloride (NaCl). Since the water near the bottom is saturated, the salt precipitates out of solution onto the sea floor. Beginning in the 1960s, water inflow to the Dead Sea from the Jordan River was reduced as a result of large-scale irrigation and generally low rainfall. By 1975, the upper water layer was saltier than the lower layer. Nevertheless, the upper layer remained
Premier Dead Sea Premier Dead Sea Dead Sea Premier Cosmetics Laboratories (Hebrew: פרמייר מעבדות ים המלח) is an Israeli cosmetics and skincare company that manufactures its products using mineral components extracted from the Dead Sea. It was founded in 1990 and is part of Hadan Group, which has been specializing in cosmetics since 1979. In 1990, a group of Russian researchers studied the effects of space travel on astronauts. Part of their clinical research was to address the effects of sagging skin, which resulted in developing Premier’s first products. In the same year Premier's Center for Research was established together with its current