Image tone may be altered with dilution.
G is a signal solution developer designed to be used straight from the bottle with no dilution.
It is replenishing by simply adding more developer to maintain solution level. Provides the blackest blacks. TST is a 2 solution developer concentrate allowing the user to alter print contrast by varying the proportions mixed of the two solutions. Photographic prints should be agitated continuously throughout the development time by gently rocking the developer tray, and gently flipping the print over in the developer every 15 seconds. This insures fresh developer is always in contact with the paper surface to promote even development, while minimizing safelight exposures.