2-4
Operating Procedures (figure 2-1)
To operate the printer, proceed as follows:
a. Loosen the clamping screws on
the
masking
blades
and
lift
the
masking blades to a vertical position.
b. Place the negative to be printed, emulsion side up, on the printing
glass.
c. Lower
the masking blades. Adjust the masking blades to the desired
print size by
loosening the clamping screws. Be sure that the edges of the
negative are
covered.
Tighten the clamping screws to hold the masking
blades in the
desired position.
d. Place the photographic paper, with the emulsion side down, over the
negative and center the image on the paper.
Use the ruled lines on the
masking blades as a guide.
e. The hinged platen arrangement makes it possible to place and hold
the paper properly over the negative before lowering the platen arm all the
way. Pull down the platen arm, and hold the paper during the first portion
of travel so that the rear platen does not push the paper away from the
desired position. When the platen arm (figure 2-1) is partly lowered, the
rear platen will hold the paper in place. Continue lowering the platen arm
until it is latched. As the platen arm is latched, the contact spring under
the platen arm automatically depresses the MOMENTARY switch, lighting the
printing lamps (figure 2-2). The jewel light glows when the printing lamps
are on.
f. Expose the photographic paper by allowing the platen arm to remain
locked for the predetermined exposure time.
After the exposure time is
completed, release the latch, raise the platen arm, and remove the paper.
The paper now is exposed and ready for development.
g. Process the paper.
See TM 11-401.
138
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