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Popular Mechanics Co.

"The Boy Mechanic: Volume 1 700 Things for Boys to Do"

But there is no reason why you should lose either
the paper or the time and trouble expended in making these prints.
By using the following method, you can turn these very dark prints
into good ones.
First: these overexposed prints must be fully developed. Do not
try to save them by rushing them out of the developer into the
short-stop or fixing bath. The results will be poor, and, if you
try to tone them afterward, the color will be an undesirable,
sickly one. Develop them into strong prints, thoroughly fix, and
wash until you are sure all hypo is removed. In my own practice, I
carry out this part of the work thoroughly, then dry the prints
and lay aside these dark ones until there is an accumulation of a
dozen or more, doing this to avoid too frequent use of the very
poisonous bleaching solution. The bleacher is made up as follows
and should be plainly marked "Poison."
Cyanide of potassium ....... 2 oz.
Iodide of potassium ....... 20 gr.
Water ..................... 16 oz.
Place the dry print, without previous wetting, in this solution.
It will bleach slowly and evenly, but, when it starts to bleach,
transfer it to a tray of water, where it will continue to bleach.


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