multinegative

A multinegative is a single sheet of film or plate carrying multiple negative images arranged in a grid pattern, used in offset lithography to print several copies of the same design, or different designs, in a single pass through the press. Rather than loading individual negatives into the camera one at a time, the printer composes them together on the film before it is exposed to the printing plate, saving setup time and reducing registration errors between impressions.

The practical advantage lies in speed and consistency. A printer preparing to run 500 copies of a business card might arrange 16 or 32 card negatives on a single sheet of film. Once that multinegative is contact-printed onto the offset plate using UV light, the plate emerges with all those images already in register with each other. The press then prints them all at once, limited only by the size of the plate and the capacity of the press bed.

Layout and composition

Composing a multinegative requires precise film stripping, traditionally done by hand on a light table. The printer uses peelable tape, opaque masks, and guides to position each negative frame exactly where it needs to sit on the master sheet. The spacing between images must account for gripper margins, color registration marks, and trim allowances. Modern work often uses automated film assembly systems, but the principle remains the same: one film, multiple images, one exposure.

Multinegatives are most common in commercial and packaging printing where runs are large enough to justify the setup labour, and where consistent spacing and alignment matter. A label printer might produce a multinegative carrying 50 identical bottle labels arranged to match the press's repeat distance. The alternative, making a separate plate for each label size or variation, would be wasteful for short runs but necessary when designs must be genuinely different on the same sheet.

The term has become less dominant in plants that have moved to computer-to-plate (CTP) imaging, which bypasses film entirely. However, multinegative discipline, the logic of arranging multiple images efficiently for one exposure, still governs how digital files are prepared for CTP systems and how press sheets are imposed in modern workflow software.