Product Description
[Formula D-19] High Contrast Developer
For Wratten “M,” Metallographic and Spectroscopic Plates
Avoirdupois
Metric
Water (about 125° F.) (52° C.)
64 ounces
2 liters
Elon
128 grains
8.8 grams
Sodium Sulphite, desiccated (E.K.Co.)
12 ounces 360 grains
384.0 grams
Hydroquinone
1 ounce 75 grains
35.2 grams
Sodium Carbonate, desiccated (E.K.Co.)
6 ounces 180 grains
192.0 grams
Potassium Bromide
300 grains
20.0 grams
Cold water to make
1 gallon
4.0 liter
Use without dilution.
Times of development are given on the factor card packed with each box of plates.
