This was done on a napkin with the same Gel Pen as Experiment 01.

The brown spots are coffee stains I put there. The one on the viewers left I rolled on with my thumb, and the two on the viewers right, I let drop from the base of my cup.

It seems mirrored because some of the ink and coffee went through the napkin. I spread it out and scanned both sides. Thought the parallel was interesting.

Again, only thing in photoshop changed were the brightness and contrast, as well as a tinted layer.