A2 - top fold - blank interior - Lettra Pearl White 300gsm. We tried overprinting two colors on this one and didn't "knock out" the places where the colors overlap. The results here are interesting but, we did one with two very light colors and got the areas where the paper is hit with two colors to give a nice blend of both colors into another one. I learned about this technique from a talented printer in the UK. If I can find the card, I'll shoot it and post it here.