Instead, I’ll use one of my convention purchases to explore the technology of the past. The panel above is a scan of Norm Breyfogle’s original art for Detective, #620, as inked by Steve Mitchell.
This story takes place just before Tim Drake ascends to the permanent role of Robin. That’s why he’s wearing a snazzy tweed suit instead of the revamped Robin outfit. Breyfogle and Mitchell achieved that herringbone pattern by applying a Zip-A-Tone pattern over the line art. The effect works better after coloring, just as the vanishing right leg of the tall gentleman doesn’t matter so much on the final page.
Ironically, in this scene Tim and Lonnie Moore, also known as Anarky and writer Alan Grant’s candidate for a new Robin, were in a high-level intellectual struggle over who was the better hacker. So the technology was very significant.