(2) Turn off all lights in the darkroom except
(3) When a satisfactory impression is ob-
the safelight.
tained, peel the master from the pad.
(3) Open the box of photographic paper,
Make duplicate copies by following
ordinary hectograph procedure. Press
remove a single sheet, and close the box.
the copy paper down firmly and even-
(4) Load the drum in the same manner as for
loading with direct recording paper, but
ly on the impression in the gelatin,
then peel it off. Fifteen or 20 brilliant
be sure to leave approximately one-fourth
copies can be made on short-run high-
inch of space between the phasing ring
and the paper.
speed paper from a good impression.
If more copies are desired, make another
Note. If film is used, place a sheet of black
paper between the drum and the dull tide of the
impression from the master, and use a
film to prevent reflections.
long-run paper which does not pick up
b. Receiving Copy. Adjust the GAIN control
the dye, so rapidly. If the copy is not
and phase the transceiver as outlined in paragraph
pressed on the gelatin impression long
enough, there will be insufficient transfer
selector switch is on RECORD PHOTO, and the
of dye on the paper, and the copies will
photographic paper or film may be ruined if the
be faint. Increasing the duplicating
light of the recorder lamp falls on the paper.
time improves the brillance of the mul-
Care must be taken to perform these operations
tiple copies by drawing more dye from
with the drum at the far right side of the lead
the gelatin, but limits the total number
screw, so that the light from the recorder lamp falls
of copies to be made from that impres-
only on the aluminum drum (fig. 17). When the
sion. Ordinarily, 2 or 3 seconds should
signal starts, leave the selector switch in the
be sufficient for the first multiple copy.
RECORD PHOTO position. Move the drum to
Increase the time by 1 or 2 seconds with
the left approximately inch until the beam from
each succeeding multiple copy.
the recorder lamp shines on the extreme left-hand
(4) After running copy, and before using
edge of the photographic paper. Engage the
another section of the pad, wipe the sec-
drum feed mechanism. Turn off the safelight.
tion used during the previous run with a
Turn it on occasionally to permit checking of the
damp sponge to hasten fading of the
transceiver operation.
impression and to replenish the moisture
Warning: Light through the type OA filter
absorbed during the run. This section
will fog type A transmission film under prolonged
will ordinarily be ready for re-use after
exposure. Therefore, whenever possible, set up
a period of 24 hours. Lift the master
the receiving transceiver before putting on the
copy from the gelatin without allowing
film. Phase the machine quickly, and turn off
it to slide. File the master copy, with-
the safesight as quickly as possible.
out folding; in a cool, dry place; it may.
Note. If the recorder lamp socket has been disconnected
be used for another impression.
When setting the GAIN control, reconnect it before
recording.
Receiving technique for photographic recording
When the entire picture to be transmitted can-
is similar to that for direct recording, except that
not be handled in a single transmission, it must be
operations must be performed in a darkroom.
sent piece-by-piece. A copy as large as 12 by 18
a. Loading Drum. Use photographic paper,
inches can be received either on direct recording
Royal Bromide F-1, for normal positive recording.
or photographic recording. For piece-by-piece
Use 1020 paper (or Aero enlarging paper), contrast
transmission, cut the original copy into sections
No. 1, for positive recording when no shrinkage of
so that the entire picture can be recorded in the
the print can be tolerated. Use Eastman trans-
minimum number of transmissions. Procedure
mission photographic film, type A, for negative
for piece-by-piece transmission is the same as for
recording.
transmitting several successive pictures, with the
(1) Turn the selector switch on the facsimile
following exceptions:
transceiver to the STANDBY position
a. During the first contact, the transmitting
and make initial preparations.
operator informs the receiving operator that the
