Variation of tone may be obtained by changing the bromide concentration, time of development and temperature of the developer. When these factors are controlled, the tone of the prints will be consistant through the long run. The longer the exposure the shorter the development, the warmer the tone.
|Sodium sulfite (anhy)||57||g|
|Sodium carbonate (mono)*||95||g|
|Water to make||1000||ml|
*82 g Sodium carbonate (anhy)
USING THE DEVELOPER
Dilute 1 part stock solution with 4 parts water.
Gevaert Warm Tone Developer (GD-67), Photo-Lab-Index, Section 15, Supplement 172, p. 41.