The Kodak Professional Tri-X 400 Black and White Negative Film is a high-speed, 35mm black and white film. In the world of black and white films, this is the classic film. It is famous for its wide exposure latitude, sharpness, contrast and grain. Tri-X responds well to push processing which makes it a very versatile film that can handle many different lighting conditions. If there is a great black and white film photograph that you like, chances are it was taken using this film. Tri-X is well suited for documentary, travel and many other types of photography.