Journal of the Society of Motion Picture Engineers (1930-1949)

Record Details:

Title:
Journal of the Society of Motion Picture Engineers
Date:
1930-1949
Publisher:
New York, N.Y. : The Society
Volume:
Journal of the Society of Motion Picture Engineers
Leaf #:
000712
Language:
English
Collection:
Technical Journals
Format:
Periodicals
Contributor:
Prelinger Library
Sponsor:
MSN
Coordinator:
Media History Digital Library
Description:
The Journal of the Society of Motion Picture Engineers (SMPE)Êdocuments the technological progress of the film industry, highlighting technical developments in production and exhibition. Of special interest are articles about special effects, theater practices, lighting, and the introduction of the 16mm format. Initially titled "Transactions of the Journal of the Society of Motion Picture Engineers."Digitized by the Prelinger Library and the Library of Congress Motion Picture, Broadcasting and Recorded Sound Division.
Date Added:
July 19, 2022
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June, 1930] STOP BATHS AND FIXING BATHS 695 10 per cent of D-16 was added. Fixing bath No. I containing 10 per cent and 15 per cent developer sludged after storing one week at 70°F. and the life after storing two weeks decreased to about 4.5 per cent of D-16 or 75 feet per gallon, while with No. II only the bath containing 15 per cent developer sludged and the hardening life was decreased to 7.5 per cent of D-16 or 150 feet per gallon. A comparison between the hardening properties of these baths indicates that (1) with the fresh chrome alum fixing bath No. II a FRESH BATH STORELP Z WEE.KS AT 70*F £tio 5 160 a r p^o uJ 90i NT"\ \ x_ \ \ \ \ \ \ \ \ " \ \ \ \ x CHROHEX s X^ S •*o F\>,\K(;T &KTH NO.l. CO ^09 160 150 12,0 90 . CHROME. FIXING e»ATTH NO.TL JO 45 IO FIG. 7. Effect of the addition of D-16 developer on the hardening properties of the potassium alum fixing baths F-l and F-2 and the chrome alum fixing baths Nos. I and II. greater quantity of D-16 developer can be added before a loss in hardening properties occurs or before a sludge is precipitated than with the other baths, (2) after storing two weeks at 70°F. the developer life of the chrome alum fixing bath No. II is similar to that of the fresh potassium alum bath, (3) the hardening properties of a potassium alum bath change very little with age, (4) the hardening properties of