Desensitizers

Desensitizing is a process whereby the sensitivity of a plate or film is depressed, so that the development can take place by a brighter darkroom illumination. At the present time (1943) the following desensitizers are available: [wptabs type=”accordion”...

Developer Improvers

These chemicals, which should be added to the developer in quantities from 0.1–0.2 grams per litre, impart to the developer valuable additional properties. They have strong anti-fogging properties. With development papers, developer improvers produce purer and deeper...

Prevention of Lime Deposits

When the developer is prepared with tap water, the solution usually appears cloudy, which fact is due to the lime salts of the water combining with alkali and forming a precipitate. This turbidity has no effect on the properties of the developer, but if the lime...