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From the Production Front
Lacquer Coating for Cine Film
By FREDERICK FOSTER
Tremendous savings and the effective preservation of valuable subjects are possible through a new method of lacquer coating for cine film, as originally reported on in American Cinematographer. Two conveniently located plants are available for this work.
INCREASING use of motion picture film outside of the large, well-equipped motion picture studios, such as in the 16-mm and television film industries, has brought with it a number of problems for producers arising from handling. Two factors which tend to impair screen quality are film abrasion and oil mottle.
Abrasion or scratching is caused by careless handling of the film when rewinding the original negative from one reel to another; when handling the negative during the break-down process; when viewing the negative in a Moviola or other type of film viewer; or improper handling when projecting, cleaning, rewinding, code numbering, etc.
Oil mottle is another serious harmful effect which mainly concerns the positive or release print. Usually, oil mottle is the result of running a film through a projector which has been carelessly lubricated so that some of the excess oil is transferred to the film where it remains until it is removed by a suitable cleaning process. Too often it happens that oil that gets on a film during its initial screening and remains there for the entire life of the film, greatly impairing its screen quality, of course.
Dual-Purpose Lacquer Coating
The modern treatment of film — both color and black-and-white — as a protective measure against abrasion and oil mottle consists of coating both film surfaces with lacquer.
Lacquer coating affords many advantages which the practical-minded film user cannot ignore. Actually,, no film surface will indefinitely resist abrasion and scratches: even treated film surfaces will become scratched. In this connection, however, lacquer coating provides a primary advantage, in that normal abrasions and scratches do not penetrate the protective lacquer coating to damage the film surface. Since the scratched lacquer coating may easily be removed and the film re-lacquered, indefinite protection is assured the film surfaces, and new print projection quality continues. This process can be repeated as long as the perforations are good, thus extending the useful life of the print.
The advantages of lacquer-coating negative footage and other original films, especially if quantity prints are to be made from them, is definitely obvious. In lacquer coating the producer has a film protection process equally effective for originals and production prints.
Film Lubrication Qualities
Lacquer coating possesses additional virtues. For example, since it seals in the normal moisture content of the film, shrinkage and brittleness are reduced and the film remains pliable, thus minimizing breakage hazards in projection. This same sealing action of the lacquer
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INTERNATIONAL PROJECTIONIST • December 1950