Precision and accuracy are completely different concepts. Let's explore what they really mean, and how to tell the difference. 1  Resolution is the fineness to which an instrument can be read.  Precision is the fineness to which an instrument can be read repeatably and reliably.
1980s & 90s-High Performance Plastics. 1980 - First production of linear low density polyethylene. 1980 - First Blue HDPE pressure pipes for potable water introduced into UK. 1982 - First artificial heart made mainly of polyurethane, introduced implanted in a human.
Polythene's story: The accidental birth of plastic bags. We can thank a chance discovery by a German scientist for the carriers that have become the scourge of modern life. It was at the end of the 19th century when a German scientist, Hans von Pechmann, discovered a waxy residue at the bottom of his test tube.