Proof reading?
We were inspecting for printing flaws. The color would often not be where it should be,but slightly off to the side.
It was hysterical and quite an eye opener for me.Some of those people did this as a full time job and I couldn't imagine it,but they were a good bunch and treated me well.
In the heat the glitter from the cards would get all over our sweaty faces. I received lots of strange looks when I got on the bus to go home. I was "glowing".