No. 1.
Sulphate of iron (Anthony's) 2 ounces.
Distilled or ice water 32 "
Sulphuric acid 8 drops.
No. 2.
Neutral oxalate of potassium 8 ounces.
Warm distilled water 32 "
Citric acid (or tartaric) 60 grains.
Bromide of potassium 180 "
When about to use, mix equal parts of Nos. 1 and 2, always pouring
No. 1 into No. 2. [p216]
The exposure having been made in the camera or in the printing
frame, place the plate in the developing tray and pour upon it
sufficient of the developing solution, mixed as directed, to cover
the plate at once, and keep it in motion from time to time. Develop
until detail in the high lights is plainly visible. When this is the
case remove the plate, wash well and fix in hypo-solution.
Water 20 ounces.
Hyposulphite of soda 6 ounces.
When the plate is quite cleared, of which it is better to make sure
by leaving the plate in the fixing solution for fully five minutes
after it first appears clear, remove it and wash again very
thoroughly, and then immerse it in the clearing solution.
Water 20 ounces.
Sulphuric acid 1/2 "
Alum 2 "
Leave the plate in the clearing solution two minutes or more, then
wash again, rubbing the surface lightly with a tuft of cotton to
remove any sediment that may adhere to the film, then set it up in a
rack to dry.