When there is no electric current available, matches or candles
may be used and inserted through the holes H, as shown in the
sketch, alternately.
** Replace Dry Putty [136]
Painting over putty that has not become dry will cause scaling or
cracking around the edges of the putty.
** Photo Print Washing Tank [136]
The accompanying sketch shows a simple form of a print washing
tank that tips from side to side by the weight of the water. For
prints 4 by 5 and 5 by 7-in. a tank 2 ft. long and 1 ft. wide will
be about the right size. This tank is then divided with a
partition placed exactly in the center. This partition should
extend 3 or 4 in. above the top of the tank. The partition may
also extend below the tank about 1-1/2 in., or a piece of this
width put on the bottom, as shown at A in the sketch.
[Illustration: Keeps Prints Constantly Moving]
A row of holes about 1/2 in. in diameter is bored through each end
of the tank, as shown at B. These holes will allow the water to
spill out while the opposite side is filling. The tank may be made
from 1/2-in. material and when completed as shown, lined with oil
cloth to make it watertight.
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