[4] Concurrent to his practice with the New York Graphic Workshop, Camnitzer produced foundational works that explored the reflexive relationships between the viewer and artwork by means of language, such as This Is a Mirror, You Are a Written Sentence (1966–68).
Beginning in the late 1960s and evolving into the 1970s and 80s, his practice also expanded to examine socio-political issues, including the oppression and cruelty of military dictatorships in Latin America.
As an example, his work Leftovers (1970) consists of 80 stacked boxes, stained with fake blood and wrapped with surgical bandages, alluding to state-sanctioned violence and repression during dictatorship.
[3]: 48 Also in this period, Camnitzer produced a series of "object-boxes" in which ordinary items were placed inside wood-framed glass boxes with textually descriptive brass plaques.
In 2024, Camnitzer's work was included in Every Sound Is a Shape of Time, a collections-focused group exhibition at the Pérez Art Museum Miami, Florida, curated by Franklin Sirmans.