There are reasons why an artist chooses a particular painting medium. Sometimes this initially happens by accident. Perhaps this was the medium a teacher in high school or college preferred. It may be the medium he or she learned while taking a community art class. Eventually, an artist most likely uses a specific painting medium because it possesses certain qualities that are intrinsic to his or her painting process.
I tended to stick with oil paint during most of my time as an undergraduate. However, I chose to use watercolor and casein for a pivotal work during my senior year. Taking Salvador Dali’s Corpus Hypercubus as a point of departure, I devised a crucifixion that portrayed a Christ not floating before cubes, but, himself, segmented into squares that floated off the gallery wall. This was really unlike anything else I was creating at the time. In many ways it was the impetus for the work I created during graduate school, and much of the work I have completed in the last decade.
It was not until the end of the 1990s, when I began to paint on book pages, that the mix of watercolor and casein became a more common medium for me. My work with oil on book pages had revealed that a combination of transparency and opacity were essential when creating a substantial figure that still allowed the text to show through. The layering of transparent and more opaque colors was similar to my work in oil paint.