Page 130 - The Wellington photographic handbook

improvement will be apparent on drying, the slide gaining in richness
and density.

WELLINGTON BORAX-M.Q. DEVELOPER.

The following Borax M.Q. formula, which has already been
referred to in the chapters on Plate development and the develop-
ment of S.C.P., can be used with very satisfactory results with
the WELLINGTON S.C.P. Lantern Plate.
BORAX M.Q.'
Metol 20 grains 1 gramme
Hydrokinone ... 50 ,, 2*5 grammes
Sodium Sulphite (cryst.) 200 „ 10
Borax (powdered) 200 „ 10
Water (hot) 20 ounces 500 c.c.
Dissolve in the order given, allowing each chemical to be in complete
solution before adding the next. This developer keeps almost indefinitely
in well stoppered bottles.
N.B.—All metol-hydrokinone developers should be used at a temperature
between 60° and 65° Fahr. Below 60° Fahr. hydrokinone rapidly loses its
developing power and at very low temperatures becomes practically inert.

The addition of 1 drop of a 10% solution of potassium bromide
to each ounce of solution is necessary to ensure freedom from
fog. In colour the image will be a slightly warm black, and softer
in contrast than that obtainable in the metol-hydrokinone developer
previously given.
By increasing the exposure from two to three times and adding
10 drops of a 10% solution of potassium bromide to each ounce
of developer, very pleasing brown tones will be obtained. Develop-
ment will take from two to three minutes. With this developer
it is easy to judge the progress of development, and the resultant
image will be more transparent than that obtained when ammonium
bromide and ammonium carbonate are used as a restrainer. Very
warm tones verging on the red are not obtainable with this developer,
but for the cooler and more artistic shades of brown it will be found
highly satisfactory.
* Before making up any formula, read the notes on pages 125, 126 and
134.
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