Once I get going, I can't believe how well the metals take the impressions and I love to experiment with textures I find around the house - common things that might generally be thrown away are the best. Earlier projects I did to add texture with the rolling mill are here and here.
Last weekend I used a pair of paper punch scissors similar to these to pop a ton of little hearts out of a paper plate to stick on the copper before running it through the rolling mill. I also cut some longer rectangular pieces to try on a different sheet.
I annealed my copper and then attached the paper plate pieces with rubber cement to hold them in place while going through the mill.
The copper sheet after the roller action - close up:
I'm still not sure what I'll use the "lines" sheet for, but I made some earrings out of the heart printed sheet. I kept the heat patina, which gives the earrings some unique hues.