We use Optical Character Recognition (OCR) during our scanning and processing workflow to make the content of each page searchable. You can view the automatically generated text below as well as copy and paste individual pieces of text to quote in your own work.
Text recognition is never 100% accurate. Many parts of the scanned page may not be reflected in the OCR text output, including: images, page layout, certain fonts or handwriting.
506 XIV. DUPLICATION OF TRI-PACK COLOE FILMS
Picture Duplication
The general instructions for making 16-mm Kodachrome duplicates are found in a booklet "Instructions for Making 16-mm Kodachrome Duplicates on Kodachrome Duplicating Film Code 5265," Issue No. 8, March 30, 1944. This should be in the hands of all those engaged in the business of making Kodachrome duplicates. It is issued by the Motion Picture Film Department of the Eastman Kodak Co ; minor revisions are made from time to time.
The basic method is simple. The lamp in the printer is first set and maintained at the color temperature of 2900 K. The intensity is then reduced to the appropriate value by means of neutral density filters or equivalent after the specified printing filters are mounted in place in the light beam.* A test original is then printed; production prints are made after the minor corrections indicated by the test are made. All tests should be made upon the same emulsion lot of film that is used for production printing. Slightly different "balances" are required for different emulsion lots. In other respects, the printing process is comparable to black-and-white printing.
Some Limitation of the Duplicating Process
When certain films are duplicated in the specified manner, the result on the screen may leave something to be desired. There are several possible sources :
(1) An accurate copy of the original may not be desired; the color balance of the original may be quite different from that desired in the duplicate. It often happens that colors il ideal" for Kodachrome are not possible or convenient in the original photographing; photomicrography, where bacteria dyes and stains are involved, is a typical example.
{2) The exposure of the original may be quite different from that desired in the duplicate. One example would be the exposure required for a short sky shot interposed between two shots of dark woodland ; such a sequence might be found in a training film dealing with the landing of airborne troops.
(3) The duplicating process itself has limitations. Some practical duplicating problems cannot be solved satisfactorily by merely following the printed Kodak instructions; they require an understanding of the pertinent limitations of the process.
* A filter pack includes an infrared limiting filter and an ultraviolet limiting filter; these are intended to limit the exposing radiation to the 400 to 700 m\i range. In practice, the former filter may be a Corning Aklo #3966, the latter a Kodak Wratten #2B. If the printer has a single light beam, it uses subtractive filters as " balancing" filters; these may be a CC-30C (cyan filter of 0.3 peak density) and a CC-10M (magenta filter of 0.1 peak density). Other color compensating filters available are yellow (minus blue) and red, blue, and green; all are available in peak density steps of 0.05.