From Anja Martin’s article for fotoMAGAZIN:
When Polaroid ceased their production of instant print film, Brian Buckley went blue: The New Yorker shifted to the cyanotype process, which had not thrilled him much up to then. But, from that point on, Buckley began to understand the different shades of blue as a challenge: “The fascination lay in the limit,” he says. Buckley mixes the chemicals himself in order to manipulate the colors better, as he wishes to achieve a cyan that is about a midnight blue or gray-blue.