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THE OPTICAL LANTERN AND CINEMATOGRAPH JOURNAL,
HINTS ON CINEMATOGRAPH WORK K\
29
By the Editor.
WE have in preparation a series of articles on Cinematograph practice, from the taking of the picture to the exhibiting upon the screen. The first chapter of this series will lie published in January ; meanwhile the following hints may prove of service to some of our readers. **>
Film Winding.
When films are kept in the small round tins in which they are sold, it is sometimes found, when it is desired to run the film on to a reel for exhibition, that the roll is wound too tightly to allow of its being placed on the supporting pin. It is customary when
putting a roll of film on the support of a projector for the purpose of winding off, to first insert a washer tube, Fig. 4 on to the support, and then to place the
roll of film over this. This percaution is necessary to prevent the roll of film tightening, and finally griping the support to such an extent as to make further movement imposssible. If a washer tube such as is shown in Fig. 4 is inserted, the film may tighten upon this as it turns, but the tube being slightly larger than the support it will turn upon the latter and allow the film to run with it till the entire roll is wound off. When the opening in the centre of a roll of film is too small to admit the insertion of the washer tube, as is the case shown in Fig 1 at C ; the opening can be enlarged in the following manner. Take hold of the roll with the left hand as shown at D, Fig. 2 and then place the fore-finger of the right hand in the centre of the roll as shown in Fig. 2. The roll may then be drawn out horizontally, forming a cone shaped mass as indicated at F. Now grip with both hands, turning the left hand in the direction indicated
by the arrow at A, and the right hand in the direction indicated by the arrow B. If the larger end of the roll at A, is allowed to slip between the fingers, whilst the right hand forces the film from right to left as shown by the arrow B : then it will be found that the roll is gradually increasing in size, and that the opening in the centre becomes enlarged as shown in Fig. 3. There will now be no difficulty in placing the tube Fig. 4, into the opening of C, Fig. 3, and finally the roll of film with the tube inserted, upon the support of the projector.
Joining Films.
Cement lor joining films can be obtained at any of the Cinematograph Filmmakers. There seems to be some difference of opinion has to how much film should overlap in joining two pieces together ; but we have found that about three sixteenths of an inch, or the space of one perforation is sufficient. The best way to proceed is as follows. Cut one end at the junction of the pictures, and the end of the film to be joined thereto three sixteenths of an inch from the junction of the first picture. Take a rule
as at C, Fig. 5, and place it over the film last mentioned, with the edge of the rule in such a position that a penknife E may be taken, and the gelatine scraped away, in a straight line across the film in the direction of the arrow. There will now lie a clear
A FiG -6.