The causes of floaters include changes associated with aging, inflammation in the back of the eye, and a torn retina, according to Mayo Clinic. Bleeding inside the eye can also result in floaters. Continue Reading.
The reasons for this are threefold. Firstly, the bulk density of raw Microsilica, being almost as fine as cigarette smoke, is about 0.2 tonnes per cubic metre. The process of micropelletisation increases the bulk density to between 300 and 650 tonnes per cubic metre.
The thickness of a sheet of watercolor paper is measured by weight. So, logically, the greater the weight, the thicker the sheet. It is measured either in pounds per ream (lb) or grams per square meter (gsm). The standard weights of paper are 90 lb (190 gsm), 140 lb (300 gsm), 260 lb (356 gsm), and 300 lb (638 gsm).