LESSON 2
since a hyposoluble compound is formed and the results can be affected by
any hypo left in the print after washing.
CAUTION: Many chemicals used in the process of toning are harmful.
Handle them with extreme care.
c. Operations using sodium sulfide or any other compound that gives off
free hydrogen sulfide gas should be carried out in a wellventilated room.
This gas is toxic if inhaled in large quantities. As a detector against
this danger, the "rottenegg" odor of hydrogen sulfide is readily
recognized. Although the odor cannot be completely avoided, if the room is
adequately ventilated, the odor should not be unbearably offensive.
Hydrogen sulfide has a detrimental effect on sensitized photographic
materials. Toning operations should be carried out in a room away from
stored sensitized materials.
d. Advantages of direct toning are that only one solution is required
and quite often prints may be toned directly after leaving the fixing bath,
with little or no intermediate washing. A principal advantage of indirect
toning is that the final tone can be altered to a greater degree during the
process and a greater variety of colors is obtainable. However, indirect
toning is not recommended for Kodak RC paper.
e. There are toner formulas available to produce almost any desired
color or tone. In addition to those already mentioned, copper toners are
used to produce red tones; gold toners can be used to give a warm light
brown or golden tone; and dyebath toners are used for green, violet,
yellow, and other colors.
f. Make sure that the type of paper used is recommended for toning and
that it can be toned with the particular formula being used. A wrong
combination can produce an offcolor print that is anything but attractive.
Formulas for many toners are given in various photographic technical books,
formularies, and manufacturer's publications.
3.
Mounting.
a. When preparing a print for display, the objective is to show the
print to its best advantage. Simplicity is essential. Any elaborate
artwork, such as colored borders or fancy lettering, will detract from the
main point of interest, which of course, is the print.
b. Prints for display purposes are generally mounted on special
cardstock to make them stand out from their surroundings. The cardstock is
available in various sizes, colors, textures, and weights; and while no
definite rules can be given, a mount should compliment the print. The mount
should be large
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