Welling's process for making these images is worth a quick review. He began by taking strips of cardboard/paper and placing them in intersecting and overlapping patterns on light sensitive paper, thereby creating a white on black image after developing. He then digitally scanned the images, reversed them, and created negative prints that were black on white.
Collector’s POV: James Welling is represented by David Zwirner in New York (here) and Regen Projects in Los Angeles (here). Welling's photographs have come up at auction from time to time over the past few years, generally in the $2000 to $10000 price range. For our collection, one of his flowers would be the obvious best fit, although a print from this series of abstractions would also make a compelling foil to our city scenes from the 1920s.