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The Photo Products Department of E. I. Du Pont de Nemours & Com¬ pany is preparing to introduce a new, synthetic safety film support known as “Cronar” polyester photographic film base. This new base is extremely tough, possessing outstanding strength and flexibility even at low temperatures.
Along with the development of “Cronar” base, the Du Pont Company has been investigating several techniques for splicing motion picture film. This has been done for two reasons. First. “Cronar” cannot be spliced with the film cements used to splice cellulose triace¬ tate film, even though it can be spliced to itself with a cement formulated specifically for the purpose. Second, be¬ cause solvent cement splices are wellknown for their tendency to fail un¬ expectedly, it was hoped that splicing techniques could be developed which would yield a stronger, more dependable splice with any film base.
One of the techniques investigated ap¬ pears to have real advantages over cement splicing for certain motion picture and television applications. It yields strong, durable splices on any kind of film base, without the need of scraping or cementing. This technique makes use of a thin, perforated, trans¬ parent adhesive tape made from “Mylar" polyester film. It was suggested by Hollis W. Moyse of the Du Pont Photo Products Division.
Pressure-Sensitive Tape Splices
Tape-splicing of motion picture film is not new. Our tape, however, is made from “Mylar" polyester film only 1 mil thick, coated with a superior-type, trans(Continued on next page )
DEMONSTRATION of new motion picture film-splicing method using tape was given recently before members of the American Society of Cinematographers by author W. R. Holm (in dark suit). New method employs unique splicer and “Mylar” tape.
Splicing Motion Picture Film With Tape
BY W . R . HOLM
Written for the American Cinematographer from a paper by V. C. Chambers and W. R. Holm presented at the SMPTE convention in Los Angeles, California, October 21, 1954, and subsequently published in the SMPTE Journal, January, 1955,
FIG. A — EXPERIMENTAL model of radically new motion picture film splicer. Comprising two sections — 1, the tape holder and applicator, and 2, the splicer base — splicing is accomplished by binding film sections together with “Mylar” tape.
FIG. B — Photo 1 shows tape holder and applicator with cover re¬ moved — more properly termed the Dispenser Unit. Note that the gummed “Mylar” tape has standard 35mm perforations. Photo 2 shows base with Dispenser removed.
American Cinematographer
March, 1955
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