The sodium sulphite must be dissolved in the water first. This solution is used without dilu tion.
Ortol Developer for Bromide Paper A. Ortol . . 4 drms. 54 g.
Potass metabisulphite 2 „ 27 „ Potassium bromide r „ " Water . . to oz. t,000 ccs.
The potassium metabisulphite must be dis solved in the water first.
B. Sodium carbonate . 2 oz. 218 g.
Sodium sulphite . 2 „ 218 „ Water . . . to „ t,000 ccs.
To develop, take 4o minims of A, 8o minims of B, and add sufficient water to maker oz.
for Bromide Paper A. Metol . . . to grs. g.
Sodium sulphite . 120 „ 27 „ Hydroquinone . 30 „ 7 " Potassium bromide to „ „ Water . . to oz. 1,00o ccs.
Dissolve the constituents in the order given in the formula.
B. Sodium carbonate . oz. 55 g.
Sodium sulphite . „ „ Water . . . to „ t,000 ccs. Mix equal parts of A and B to form the work ing developer.
All these formula produce rich prints of a good, pure colour, which will tone quite satis factorily. Full development will take about three minutes with the diamidophenol and metol hydroquinone formula, and four minutes with the ortol. The print should be soaked in
water for about half a minute, the water then drained off, and the developer flowed evenly over the surface, the dish being rocked until development is completed. Then the print should be rinsed and immersed in the fixing bath, taking care that the prints do not cling together and that the solution has free access to their surfaces. An acid fixing bath is prefer able, containing t oz. of potassium metabi sulphite to 1 lb. of " hypo," the solution being so mixed that t pint should contain 3 oz. of " hypo." The prints should remain in the fixing bath for fifteen minutes, and should afterwards be thoroughly washed. From one to two hours, in water frequently changed, according to the frequency of the changes, and the number of prints in the dish, should be sufficient.
Daylight can also be used for bromide work if desired, and many prefer it for enlarging pur poses, though it is not suitable for contact printing. (See also " Enlarging.")