Surveys suggest that most Americans consume less than the RDA for copper each day. Up to 10,000 micrograms daily appears to be safe for consumption in adults. Vegan diets appear to provide adequate amounts of copper. In a number of clinical trials copper doses of 2-10 milligrams by mouth were safely used in patients. For plaque inhibition, a 1.1mM copper rinse has been used for four days.
Best Answer: Petroleum jelly or petrolatum is made by refining a byproduct of oil drilling. Petrolatum is a semi-solid mixture of hydrocarbons, having a melting-point usually ranging from a little below to a few degrees above 100Â° F (37Â° C).etroleum jelly is made by touching-up a byproduct of oil drilling, or some left over products of oil drilling. Vaseline is a well-known brand of petroleum jelly. Source(s): http://en.wikipedia.org/wiki/Petroleum_j... Cap'n Eridani Â· 9 years ago. Thumbs up. 1. Thumbs down. 1. 1 comment. Loading ...
In 1872, Chesebrough patented (U.S. Patent 127,568) the process of making petroleum jelly. The patent said that distillation by heat under vacuum involves less heat than without the vacuum, and yields a better quality of jelly. The product is then filtered through bone char.etroleum jelly. Petroleum jelly or petrolatum is a byproduct of the refining of petroleum, made from the residue of petroleum distillation left in the still after all the oil has been vaporized.