Not to be confused with sync marks. Cinch marks are small vertical scratches on a roll of film that are caused when the end of the film is pulled to tighten the roll, causing any dust on the film to make a small scratch. Too much drag on the supply while rewinding is one common way that cinching can occur.thepolliofolioglossaryofcinematographyterms
Short scratches on the surface of a motion picture film which run parallel to its length. These are caused by dust or other abrasive particles between film coils or improperly winding the roll, which allows one coil of film to slide against another.
AKA: ScratchesScratches on a print running parallel to the edge of the strip of film. Typically caused by improper reel winding which allows one coil of the print to slide against another.