The American annual of photography (1914) (14780144312)

Identifier: americanannualof28newy (find matches)
Title: The American annual of photography
Year: 1914 (1910s)
Authors:
Subjects: Photography
Publisher: New York : Tennant and Ward
Contributing Library: Harold B. Lee Library
Digitizing Sponsor: Brigham Young University



Text Appearing Before Image:
T would seem almost unnecessary to suggest an-other developer in the face of the numerousformulae extant; but my purpose is rather to-wards simplification than multiplication. Thereare some workers who consider that the plate-maker is most likely to know what developer suits his produc-tions best, but this is open to argument. It is obvious fromexamination of many commercial formulae that they weredevised when emulsion-making had not reached the high stagethat it has now and very few of them seem to be based onphotochemical investigations. 174
Text Appearing After Image:
s: V Q< oo It has yet to be proved that one developer will do morethan another; and, excluding ferrous oxalate, it is generallyaccepted that developers merely differ in their rate of action,and provided that you know this and determine the necessarytime to obtain a given degree of contrast, that is, to obtain theclass of negative you want, they can be used indiscriminatelyfor all plates and papers. It may seem a retrograde step to advise the use of onedeveloper, and one only, for all work; but it certainly makesfor simplicity and gives one constant factor, thus eliminatingany question of the developer being to blame if results do notturn out as they should. I have used the following for thirteen years and see noreason to abandon it though naturally I try any new agentthat is introduced. Occasionally one reads of some wonderfulnew concoction, or combination of old ones, which is said todo everything under the sun, except make the plate and theexposure. This is, of course, only adver