Solution A

Pyrocatechin...... 2 parts

Sulphite of soda,

crystals......... 2.5 parts

Water............ 100 parts

Solution B Carbonate of soda. 10 parts

Water............ 100 parts

Before using mix 20 parts of Solution A, and 0.5 part of Solution B.

Metol Quinol

Water............. 10 ounces

Metol............. 7 grains

Sodium sulphite, crystals, pure.....         0.5 ounce

Hydroquinone..... 30 grains

Sodium carbonate, dessicated........ 200 grains

(or 400 grains of crystallized carbonate).

Ten per cent bromide of potassium solution, about. . . 10 drops

Amidol Formula

Water............ 4 ounces

Sodium sulphite, crystals, pure ... 200 grains

Amidol, about..... 20 grains

Ten per cent bromide of potassium solution, about.......... 5 drops

If the blacks are greenish, add more amidol; if whites are grayish, add more bromide of potassium.

Hypo-Acid Fixing Bath

Hypo............. 16 ounces

Water............. 64 ounces

Then add the following hardening solution:

Water. ............ 5 ounces

Sodium sulphite, crystals.......... 0.5 ounce

Commercial acetic acid (containing 25 per cent pure acid)............ 3 ounces

Powdered alum.. ... 0.5 ounce

Amidol Developer

Amidol......... 2   grains

Sodium sulphite. .. .   30   grains

Potassium bromide.     1    grain

Water.............     1    ounce

With a fairly correct exposure this will be found to produce prints of a rich black tone, and of good quality. The whole secret of successful bromide printing lies in correctness of exposure. It is generally taken for granted that any poor, flat negative is good enough to yield a bromide print, but this is not so. A negative of good printing quality on printing-out paper will also yield a good print on bromide paper, but considerable care and skill are necessary to obtain a good result from a poor negative. The above developer will not keep in solution, and should be freshly prepared as required. The same formula will also be found useful for the development of lantern plates, but will only yield blacktoued slides.