Investigations on Photographic Developers: Sulphide Fog by Bacteria in Motion Picture Developers

1. A tank of MQ developer, used for the development of motion picture negative film suddenly began to give excessive fog. The developer had been in use for about six weeks in a 65 gallon soapstone tank but had not developed its normal footage of film (about 500 feet per gallon). The next lot of developer in the same tank gave excessive fog after three weeks use when 5000 feet of film had been developed. The solution smelled badly and the odor of hydrogen sulphide was distinguishable. Further tests, as deseribed later, confirmed the presence of sulphide.

Print ISSN

0096-6460

Published

1924-09

Content type

Original Research

DOI

10.5594/J14190