 Among his friends and colleagues at this time were Bill Beckley, Les Levine, Gordon Matta-Clark, William Wegman, and Hannah Wilke.Welch also began to work primarily in multi-media and created a three-channel video Passing On.In 1972, Welch had solo exhibitions at Sonnabend Gallery in Paris, Konrad Fischer in Düsseldorf and Yaki Kornblit-Galerie 20 in Amsterdam.