Page 47 - The Wellington photographic handbook

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THE DEVELOPER.

Any of the standard developing substances on the market
will give good results with WELLINGTON film if the strength
of the solutions in which they are used has been correctly adjusted.
Pyro is as good a developer as any, the pyro-soda formula which
is recommended for WELLINGTON Plates being the most
suitable. Metol-hydrokinone also gives excellent results.
PYRO-SODA.*
No. 1.
Pyrogallic Acid 1 ounce 50 grammes
Sodium Sulphite (cryst.) ... 2 ounces 100
Citric Acid 40 grains 4-5
Water to 10 ounces 500 c.c.
No. 2.
Sodium Carbonate (cryst.) ... 8 ounces 100 grammes
Sodium Sulphite (cryst.) ... 8 „, 100
Water to 80 1 litre"
Take 1 ounce (30 c.c.) No. 2, 1 dram (4 c.c.) No. 1 Water 1 ounce (30 c.c).
METOL-HYDROKINONE.*
Metol 20 grains 1 gramme
Hydrokinone 60 „ 3 grammes
Sodium Sulphite (cryst.) ... 700 ,, 35
Sodium Carbonate (cryst.) ... 700 35 „
Potassium Bromide 6 „ 0-3 gramme
Water to 20 ounces 500 c.c.
Dissolve in the order given, allowing each ingredient to be in complete
solution before adding the next. For use dilute with an equal quantity of
water. ""~ *" 1 1
N.B.—All metol-hydrokinone developers should be used at a temperature
of from 60° to 65° Fahr. Below 60° hydrokinone rapidly loses its developing
power, and at very low temperatures becomes practically inert.
The method of making up these developers is given on page 14.

TIME DEVELOPMENT IN THE TANK.
WELLINGTON Films are admirably adapted for time
development in the tank. The following formulae are recom-
mended :
* Before making up any formula, read the notes on pages 125, 126 and 134.
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