How, then could we measure the effects on the plastic?

It just depends on what plastic you are talking about.

I slipped on wet white plastic and hit the floor.

Pam - 12 hours ago I had no idea one can get cancer on plastic.

He turned to Mary who was sucking on the plastic.

She nodded at the man who had slapped on the plastic.

He sucked on the plastic and held off the tears.

In spite of all the blood, not a single drop showed on the plastic.

Nobody's been interested to copy them off on fresh plastic, not for a hundred years.

If we all paused to look around before beginning to read this article, chances are our eyes would land on plastic.