What the hell is Cross-Processing?

Cross-processing (also known as ‘x-pro’) is the procedure of deliberately processing one type of film in a chemical solution intended for another type of film. As particular chemical solutions are optimized for specific kinds of film, you will get unpredictable and interesting results when they are combined differently.
Before anything else, let us tell you about the different chemicals used for the 2 most common types of consumer film.

Get the lowdown on Cross Processing here: http://www.crossprocessing.info/