Page 75 - The Wellington photographic handbook

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It is interesting to note that prints which are bleached im-
mediately on removal from the washing water are colder in colour
than prints which have been dried between washing and bleaching.
If a warmer sepia tone is required than that which is obtained
by bleaching and re-developing in the solutions given above, a
small quantity of a 10 per cent, solution of potassium iodide may
be added to the sulphide, say, one dram to each pint of the dilute
solution.
The sulphide solution must on no account be stronger than
that given above, or there will be a risk of the print blistering.
With the strength given there is no chance of trouble from this
cause.
The finished print, after toning, may be mounted on a stout
card, and " encaustic paste," or a solution of wax in turpentine,
well rubbed into the surface, afterwards wiping off as much as
possible. This imparts great richness to the print, and is par-
ticularly suitable for enlargements which are to be framed up
close. Pictures so made cannot be distinguished either in colour
or quality from the best sepia carbon prints.
The following is a suitable formula for the Encaustic Paste :
Purified Beeswax ... ... ... ... 500 grains
Oil of Lavender 300
Benzol 300
Gum elemi ... ... ... ... ... 10
If desired the sulphide-toned image may be re-toned to a
rich red colour by immersion in the following bath :—
Ammonium Sulphocyanide ... 100 grains 10 grammes
Gold Chloride ... ... 10 ,, 1 gramme
Water to ... ... ... 10 ounces 500 c.c.
After toning, wash for ten minutes in running water or several
changes.
THE HOT HYPO AND ALUM TONING BATH

For Sepia tones the Hot Hypo and Alum Toning Bath can, if
preferred, be used in place of the method described in the preceding
pages. A stock solution is made by dissolving ten ounces of Hypo
in seventy ounces of water heated to 135° Fahr., and when all is
* Before making up any formula, read the notes on pages 125, 126 and 134.
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