PRINTING ON GELATINO-CHLORIDE PAPER. 
137 
Velox Developer. 
Water 
Metol 
Sodium sulphite 
Hydrokinone 
Sodium carbonate, desiccated 
(or, Sod. carb. crystals 
30 grains. 
200 grains. 
400 grains ) 
ro ounces. 
7 grains. 
\ ounce. 
Potass bromide ten per cent, solution ... 10 drops. 
The paper is soaked for a few seconds in water, laid 
face up in a clean dish, and the developer “ swished ” 
evenly over it. Clean water or a rose tap must be 
handy in case of over-exposure, but the only really 
good prints are those that have had exactly the proper 
exposure, so that the developer may be allowed to act 
on it till its action seems to be at an end, or almost so. 
If the negative is very “ thin,” or wanting in contrast, a 
little more bromide may be added, say one drop, or two, 
to an ounce of developer, but much bromide leads to 
greenish tones. After development the print is to be 
fixed in sodium hyposulphite 1 part, to water 5 parts. 
An acid fixing bath is much recommended by the 
makers of these papers, but we do not use it; we do, 
however, give the prints a bath of alum after fixing and 
partly washing, especially if we propose later to give 
them a glossy surface by squeegeeing them to glass or 
ferrotype plate—a step which we recommend for this 
work, and for which we give directions on page 134. 
In the whole of this process, absolute cleanliness of 
fingers is necessary—in fact, the face of the paper 
should not be touched at all. 
