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.
The very first plastics were made by natureâdid you know that rubber from a rubber tree is actually a plastic? Interest in making plastics arose in the 1800s to replace scarce materials such as ivory and tortoise shell. The first synthetic plastics were derived from cellulose, a substance found in plants and trees.