Film leader

When starting band is a technically well-defined piece of film, which is located at the beginning of each roll of film (Act ). Task is, first, the protection of the actual image part of the film, similar to the book cover, second retaining information about the film and each act, that movie title, copy number, Aktnummer, image format, sound system ( optical sound, magnetic sound ) and language (s) version, thirdly Help for synchronous performance and copy technical information.

On the Home ribbon located brands are the correct film clamping into the projector and decreasing numbers of 7-2 seconds before the first frame. Instead of the number 8 is the picture start. The flow of the starting band of several seconds is required so that the inertial mass of the sound unit can be accelerated without film cracking and with beginning of the sound can be heard no distortion. The idea is also found in the placement of the so-called transition character at the end of each film act: 8 seconds before the last image appears in the upper right corner is a " warning sign " that causes the projectionist to start the second projector and 1 second before the last image appears the " fade character", whereupon the projectionist while switching the sound to open the image flap of the second projector, while he closes the first. This process can only be vonstattengehen unnoticed for moviegoers when the start tape has been inserted correctly.

The details of the start and end band for release prints in the format of 35 mm and 16 mm, in addition to national recommendations and regulations with the standards ISO 4241 stipulates inter alia.