How to make a relief line block and a halftone plate (old school)

Here are our worn but still useful teaching progressives for the making of metal relief line blocks and the making of metal halftone plates. These were done many years ago, when we still brushed on acid without a fume hood. The images are fairly high resolution so you should be able to zoom in but here are also a few details.


Rockwell Kent design for an invitation done in two color metal relief, sent to Elmer Adler (who did not drink), 1930.