Xerography Turns 75

By Bob Neubauer

Using his kitchen as a lab, Carlson conducted rudimentary experiments, uncovering the fundamentals of "electrophotography." He later set up a small lab in a rented second-floor room above a bar in Astoria, and hired a young physicist named Otto Kornei. On October 22, 1938, they met with success.

"I went to the lab that day and Otto had a freshly prepared sulfur coating on a zinc plate," Carlson later recounted. "Otto took a glass microscope slide and printed on it, in India ink, the notation '10-22-38 ASTORIA.' We pulled down the shade...then he rubbed the sulfur surface vigorously with a handkerchief to apply an electrostatic charge, laid the slide on the surface and placed the combination under a bright, incandescent lamp for a few seconds.

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Bob Neubauer Author's page

Bob has served as editor of In-plant Impressions since October of 1994. Prior to that he served for three years as managing editor of Printing Impressions, a commercial printing publication. Mr. Neubauer is very active in the U.S. in-plant industry. He attends all the major in-plant conferences and has visited more than 180 in-plant operations around the world. He has given presentations to numerous in-plant groups in the U.S., Canada and Australia, including the Association of College and University Printers and the In-plant Printing and Mailing Association. He also coordinates the annual In-Print contest, co-sponsored by IPMA and In-plant Impressions.