WHAT IS CROSS PROCESSING?
Cross Processing is intentionally processing film in the wrong chemicals, creating interesting and unpredictable color shifts and increased contrast. For example, cross processing would be shooting a roll of color slide film or E6 and developing it as if it were color negative film or C41 (or visa versa). The best thing about cross processing is the unpredictability of it, you never know what you’re gonna get, but that’s the fun of photography, and likely you shoot film.