Society of Motion Picture Engineers : incorporation and by-laws (1929)

Page scan 000437 from Society of Motion Picture Engineers : incorporation and by-laws

Record Details:

Title:
Society of Motion Picture Engineers : incorporation and by-laws
Date:
1929
Publisher:
New York : Society of Motion Picture Engineers
Volume:
Transactions of the Society of Motion Picture Engineers (1929)
Leaf #:
000437
Language:
English
Subjects:
motion pictures, Cinematography -- Periodicals
Collection:
Technical Journals
Format:
Periodicals
Contributor:
Library of Congress, MBRS, Moving Image Section
Sponsor:
Library of Congress, Motion Picture, Broadcasting and Recorded Sound Division
Coordinator:
Media History Digital Library
Description:
Preceeded by an unnumbered issue published in 1916 called: Incorporation and by-laws
Date Added:
September 12, 2024
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Fine-Graiii Developers — Carlton and Grahtrce 421 values are decreased without an appreciable decrease in the general development. 4. Effect of Variation of Sulfite Content. On increasing the concentration of sulfite from 25 to 100 grams per liter, the rate of development and the speed of the emulsion are slightly increased. Further additions of sulfite decrease the rate of development but the emulsion speed is not affected (Nos. 26-30, Table II). The influence of sulfite on graininess will be discussed later. 1.5 1.2 06 '^.^ e>ORIC ACIP CGRAMS PtR LITER) e>ORAX (grams per l\te:r) 14 A Z & 5 II c ft a P II 5 E. lA Z F REGULAR BORAX C?EVELOPER TIME or PEVELOPKENT (kUNUTES) <b a l^. Figure 5. Time-Gamma Curves for Various Proportions of Borax and Boric Acid in the Eegular Borax Developer Formula at 65 °F. (Rack and Tank Method). (Eastman Negative Panchromatic Motion Picture Film, Type 2). 5. Effect of Addition of Sodium Sulfate. Hydrated sodium sulfate has been added to tropical developers to decrease the swelling of the gelatin and the rate of development.^^ Up to a concentration of 100 grams per liter, it decreases the rate of development without decreasing the speed of the emulsion or increasing the fogging action (Table II, Nos. 16, 17, 18). Various quantities can be added to the modified developer recommended above to further decrease its rate of development.