I was just doing a little exploration, with no particular direction in mind. However, I used to work with *Zipitone way back when, and thought I would try to emulate the look with Photoshop.
*I'm not sure a lot of you know what Zipitone is/was. Back in the day, the printing process was separated using mechanicals. Depending upon the quality of the paper, you had a different "line screen." Zipitone was a sticky backed acetate that had little dots printed on it; it came in different line screens so artists could prepare their mechanicals accordingly. The sheets of dots came in different values, so after you did your drawing, you could lay down the Zipitone and cut out the value where you needed it.