I've been trying for a while now to create the old feel in my own comics. I love the dots Lichtenstein enlarged so prominently, I love the little errors of pre-computer printmaking techniques, I love the sloppyness that came with hand made massproduction. Marcus' previous post of the treasures to be found in the digital comic museum are great reference material, and now I found a blog dedicated to 4CP, four color process, the wonderfull technique they used to color the comics.
They even wrote those dots a loveletter:
Dots emit radiation. As you get closer to them, they begin to vibrate and pulse. Moving closer still, the color separations become dramatically separate: Solids become very solid and the black ink holds together, while the CMY dots fly apart. Foreground and background, positive and negative space, reverse unexpectedly. Orange, green, brown, and fake gray give up their secrets, and the basic building blocks of a universe reveal themselves. Unstable molecules, built of primary colored atoms, buzz at different frequencies. Vectors of visual force, experienced implicitly at original size, become intense. Behind everything is wood pulp paper, a still deeper layer of creation, with its own unstable properties.
Here are some of my attempts to get more or less the same effect. I think if this is printed, and than scanned again, it might be as close as I can get.