Artist, Jamie Dearing: I'm Jamie Dearing, and I began working with Donald Judd as his assistant in 1967. Don had three main elements that he dealt with as the major themes in his work: color, materials, and space.
You immediately see that it's red, and it's intensely red. He built up the intensity of the pigment, so it became very, very powerful red, it's strident. It's almost aggressive. The division in it is purple. Purple is halfway between red and blue. And the piece is divided in half at the diagonal.
And the whole one side of the diagonal is missing. But the intensity of that violet diagonal expresses an incredibly intense missing bit of space.
I think it's helpful in looking through a retrospective of Judd's work to ask yourself along the way, “What is space? Where is the center? Is it open or closed? What is visible and invisible?”