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Twenty
The INTERNATIONAL PHOTOGRAPHER
July, 1929
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This beautiful building, of Class A, fireproof construction throughout, located at 6656 Santa Monica Bird., will eventually be four stories in height, as the foundations, supports and walls have been made to accommodate an additional two stories. It has a flavor of ancient Egyptian architecture, is 50 feet wide, 115 feet deep and has a 100% sprinkler system. The walls and ceilings are entirely finished in Texcrete and the woodwork is of selected Southern Gum with trim. The building was designed and constructed by H. A. McMurphy, of Hollywood. The loner floor is devoted to film storage and clerical offices and a large reception hall and lobby. The second floor is given over to the executive offices, an attractive lounge and the research department.
'Borax 'Developer (Characteristics
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H. W. MOYSE and D. R. WHITE
Spring Convention, 1929
(Abstract of Borax Developer paper read by Mr. Moyse at S. M. P. E. This abstract specially
drawn for Thf International Photographer).
The results of some recent tests of borax developers are here briefly presented.
Method of Test
Strips of film exposed back of a sector wheel giving, on a time scale, factor two steps between successive exposures were developed for various times in the developer being tested. The development was carried on in a flat tray rocked during the course of the development under such conditions that there was great opportunity for aerial fog to be produced
if the edveloper tended to produce such fog. The densities so produced were read to give the final density — time of exposure — time of development data used in comparing the characteristics of the developers.
Developers Studied
Two main series of tests were conducted. In each series a basic formula was chosen and that formula varied over a wide range of combinations of the constituents. The formulas are given below:
1st 2nd
Substance
Series Series
Sodium Sulfite (Anhyd.)
100 75
Metol
2 2.5
Borax
2 5
Hydroquinone
5 0
Potassium Bromide
0 0
Results
The results will be presented here as completely as possible as independent statements of the effect of each component. Such statements alone cannot present all of the information since the change of any one