PH2 Noel R. Guest
165.2
Figure 11-31.—A processed test strip.
the solution; push it under the surface again and leave it
under during the remaining time in the developing tray.
The print must be immersed rapidly and evenly to
prevent the formation of air bubbles on the emulsion
surface. Be sure that all the emulsion gets wet with
developer in the shortest time. Agitate constantly for the
remaining developing time.
Each type of printing paper has its own working
characteristic, differing mainly in the length of time
required to develop the image in a given type and
strength of developer. A correct print is one that
develops to the proper density and contrast in the
recommended time.
When the print is fully developed, lift it out of the
developer, drain it momentarily, and place it in the stop
bath.
After about five seconds in the stop bath, lift the
print, drain it briefly, and place it in the fixing bath.
Agitate it in the fixing bath for a few seconds and
examine it for any defects that might cause it to be
discarded. When the inspection is completed, place it,
emulsion down, in the fixer and complete the fixing
process. Use the manufacturer’s recommended fixing
time.
Some papers have a tendency to float in the fixing
bath, especially if the bath is mixed a little stronger than
usual. When prints float in the fixer, they should be
handled constantly, or turned facedown to prevent the
emulsion from being exposed to the air. The parts of a
print exposed to the air during fixing may become
stained.
11-35
