Motion picture film emulsions are coated on a 54-inch-wide continuous web of film base. These 54-inch rolls constitute the master stock rolls that are slit into strips during the finishing process. Each master roll is assigned a number, and each strip also has a reference number. After slitting, the strips are perforated and cut to the designated lengths. KODAK and EASTMAN 16 mm camera films used for direct projection are available with magnetic- sound striping for use in single-system sound cameras. A recording stripe 0.100-inch wide is applied along the unperforated edge on the base side and a narrow balance stripe is applied along the perforated edge of the base. KODAK and EASTMAN Motion Picture Camera Films are then wound on cores or spools, the ends are taped, and the wound film is wrapped in black, plastic bags before being packaged in taped metal cans or box bins. The plastic bags protect the film from exposure to light, provide a high degree of cleanliness, and make the film fit snugly inside the can.

The tape used on the outside of a film can serves as a seal between the cover and body of the can. This tape is designed to resist the flow of air and moisture so that the newly manufactured film retains its original moisture, content. The tape and the can are both marked to identify the contents. A description of the identifying codes on tape, can label, and film appears under FILM IDENTIFICATION.

The "rolls available" block on the data sheet describes forms in which a particular film type is available.

The first column gives the catalog number (CAT No.), perhaps the most important piece of information to know when ordering film from Kodak. The catalog number identifies a particular kind of emulsion, film format, and length to our Customer Relations Representatives. For example, CAT No. 124 6636 describes only one film package: 100 feet of EASTMAN Color Negative Film 5247 (35 mm), EI Winding, one row of perfs (1866 pitch), with a film identification number of ECN718.

The second column gives the film identification number, a combination of a three-letter film emulsion designation (ECN, in the example above) and a three-digit specification number (718, in this case). The number designates film width; perforation type and format; type of core, spool, or magazine; and winding. This code does not generally refer to the film length.

The last two or three columns-Description, Format (applicable only to films available in multi rank), and Perforation Type-provide the film length and the information abstracted from the specification number.