A-B-C of Motion Pictures

A-B-C of Motion Pictures

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1916 edition. Excerpt: ...perforated alike, and 'when superimposed the perforations fall in alignment. The film-feeding device of the printer engages in these perforations just as we saw it do in the camera, only in this case it is moving the negative and positive film along simultaneously. What would be the lens in the camera is here the place where the light is allowed to pass through. Once more the shutter serves its purpose of shutting off the light while the required length of film for one small picture is shifted into place. As in the camera, care is taken that the light strikes no portion of the film but the three-quarter-inch strip that is being exposed. The action of a printer is practically automatic, but the human touch is evident in determining the brilliancy of the light, its distance from the film, and the speed at which the printer will be run, all points determined by the condition of the negative. The developing of positive film is a process much similar to that we have just described for the negative film. The chemicals used in the formulas are much the same, though the proportions vary. As positive film is less sensitive to light than negative, the developing need not be done in a dark room, though even here daylight, or the "yellow" light of the common electric bulb, is not permissible. To the eye positive and negative film appear much alike, and, in truth, they differ only slightly to render them more adaptable to their different uses. The drying of both positive and negative film, following the various operations, is accomplished by means of large drums, on which hundreds of feet may be wound. The picture producer may now decide to tint some portions of his film and to tone others. Tinting is nothing more than giving the...show more

Product details

  • Paperback | 24 pages
  • 189 x 246 x 1mm | 64g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236811062
  • 9781236811066