Robert Rauschenberg
Blackburn also served between 1957 and 1963 as the first master printer for Tatyana Grosman's Universal Limited Art Editions (ULAE), where he produced editions for such artists as Helen Frankenthaler, Grace Hartigan, Jasper Johns, Robert Rauschenberg, and Larry Rivers. He returned to primarily working at the Printmaking Workshop on a full-time basis after a printing accident in 1962, in which a stone by Robert Rauschenberg was broken, shaking Blackburn's confidence.