(Wellington Formula.)

Amidol

50 grains.

Sodium sulphite ..........

650 "

Potassium bromide ........

10 „

Water..............

20 ounces

This developer must be used within three days of mixing.

It is not advisable to put the prints into water after developing and before fixing them, as the developer goes on acting to a slight extent, and prints so treated will be found to be less brilliant and have a greyish veil in the whitest parts which should not be present.