An edge code or edge number is a number printed on film for identification or information purposes. There are three types of edge numbering:

• Latent image edge numbering - applied by the film manufacturer and visible only on processed film
• Visible ink image edge numbering - applied by the film manufacturer and visible on raw stock and processed film
• Laboratory image edge numbering - applied by the laboratory after film processing.

Edge codes are also known as edge number, code number, footage number, negative number, ink number, key number, key edge number or Key Kode.

References

• Kodak Edge Numbers