Here is the back of my hand-made trading card. The whole thing is one big simulation. First, I used a cardboard texture to make the back of the card stock look as inferior as possible. Then I used a transparent magenta ink, as that would be among the cheapest available to offset printing; there is normally a four colour gamut - Cyan Magenta, Yellow, and blacK (CMYK) - and of the darker inks, magenta would likely be the least used and therefore the one most available for something truly economical like the back of a sports card.
Hopefully you'll recognize the little "Mac" character that I drew a few days ago especially for this card. To see more on Mac, please check out JSVB Post #1016 by clicking here.