How to understand the conductive, semi-conductive and anti-static in the plastic tray?

First of all, let's introduce what is called anti-static blister tray, which means that the anti-static substance is added to the material or the surface of the tray by means of external spraying or internal addition, so that the blister tray is made to absorb static electricity and protect the inside. The shipped precision electronic components are not damaged by static electricity. So how do you understand conductive, semi-conductive and anti-static?

In the anti-static blister tray, there is a terminology called anti-static index, which is a standard used to measure the anti-static effect of the tray. Let's take a look at the instrument for measuring anti-static. According to the anti-static index, we divide the anti-static plastic tray into three levels: conductive, semi-conductive and anti-static. The best anti-static index is the most conductive, semi-conducting, anti-static is the worst.