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16
BETTER THEATRES SECTION OF
June 20, 1925
Fig. 1.
Fig. 2.
Fig. 7.
Fig. 8.
How to Splice Films
Among the many interesting booklets issued by the Eastman Kodak Company covering the handling of film is one devoted to film splicing which Better Theatres reproduces herewith in the belief that it will be found of general use and value.
The Eastman pamphlet says:
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Fig. 3.
**A11 photographic film consists of a transparent film base and a light-sensitive gelatine layer known as the emulsion. The emulsion side is dull; the other side is shiny.
“VVhen two pieces of motion picture film are cemented together the joints are known as splices. Splices may be made by hand or machine. If these instructions are carefully followed, satisfactory results will be obtained.
“Before splicing the film, wipe it free from dirt or oil with a clean cloth. Take one end of the film and cut it with scissors, directly along a frame line. (The frame lines are the boundary lines between each little picture.) Take the other end of film in the left hand and cut directly across between perforations about 3/16 of an inch to the right of a frame line, toward the broken end of the film, as in Fig. 1.
“The emulsion on the narrow strip of film, between the frame line and the edge where it has been cut, must be removed. Moisten this end of film and scrape off the emulsion with a razor blade or a pocket knife, as shown in Fig. 2.
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“Unless this emulsion is completely removed it is impossible to make a satisfactory splice, as cement will not adhere to emulsion. Do not scrape deeply into the film base as this will weaken the film.
“Place the end of the film, which has been cut along the frame line, on the table, emulsion side down. Take the film which has been scraped in the left hand and apply Eastman film cement to the scraped surface as shown in Fig. 3. Do not apply too much cement. Immediately place this cemented end of film overlapping the other end of film so that the perforations on the edges will register perfectly, one on top of the other. (The cement sets rapidly due to evaporation of solvent and will not stick unless joint is made very quickly after cement is applied.) Then press these two pieces firmly together for a few moments with your fingers.
“Cut with scissors one end of the film directly along a frame line and place it upon the machine, emulsion side down. Bring down the lever A to hold it securely in place, as shown in Fig. 5.
“Take the other end of the film in the left hand and cut with scissors directly across between perforations about 3/16 of an inch to the right of a frame line, toward broken end of film. (See Fig. 1.) Moisten the narrow strip of film between the frame line and the edge where it has been cut. Place a straightedge along the frame line and remove emulsion from the protruding strip, using a razor blade or pocket knife, as shown in Fig. 6. Apply Eastman Film Cement to the scraped surface of film (Fig. 3) and place it in position, emulsion side down, on
the machine, overlapping the other end of film, as shown in
Fig. 7. Draw the index finger firmly across the splice to remove air bubbles, then bring down the arm B (Fig. 7) and
fasten it securely in position with the clamp C, as shown in
Fig. 8.
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“Allow it to stand a few seconds, then remove the clamp C, lift up arm B, and wipe excess cement from the film with a clean cloth.
“Several types of splicing machines are available, all of which are used similarly to the one described above.”