What does a movie print look like and what is worth knowing about it?

When a movie is made, the film that is shot is a reversal film, i.e., it is the same as the negative of the photograph that is shot, which is a complementary color. In the printing plant will be reversed film and then printed into "photos", that is, prints, and can be copied in large quantities of dozens or hundreds of prints sent to theaters around the world. Boxes of film are also called prints, and in order to enable several theaters to show the same film at the same time, film producers often copy more than one copy to each authorized theater. The general procedure for a movie is to shoot negatives, turn positives, edit, turn negatives, and print positives (prints). In the early years of film is to run between the theaters, is a large box of film, sent to the theater, the end of the screening will be taken away, sent to the next theater; in recent years, the digital version of an ordinary movie is probably less than 100G (3D is less than 200G), will be sent to the theater in the form of a hard disk copy, but the format is encrypted, theater will be put into the digital copy to connect to the player's server, and then decrypted with a key obtained from the authorizer, it will be sent to the theater. The theater puts the digital copy on a server connected to the player and decrypts it with a key obtained from the licensee, and then it is ready for playback. At the end of the movie season, the key expires and the digital copy is invalidated.