Always clean skin meticulously, an acne skin is very sensitive. Eat a well balanced diet, avoid fatty food and take plenty of exercise, especially in the out-of-doors. Certain pure essential oil can be applied neat to individual marks-such as: 1  Tea tree oil. 2  Lavender oil.
The grain is a measure of weight. 1 grain is equal to 1/7000th of a pound. Or 7000 grains are in 1 pound. There are 15.43 grains per gram for those who are metric. It's just a weird way of saying how heavy something is in firearms. More grains means heavier bullet.
The hardness of water is measured in grains per gallon (gpg). One grain is equivalent to 17.1 milligrams of calcium or magnesium dissolved in one liter of water. For example, one aspirin is equal to 5 grains, and when dissolved into a gallon of water, the unit of measure would be reported as 5 grains per gallon.