The Salt Lake herald. [volume] (Salt Lake City [Utah]) 1870-1909, 1899-01-08

opening. These strips are for the pur-
pose of holding the negative.
In case the room does not have a
window through which the light from
the sky is admitted direct. a mirror
about three feet long should be placed
outside of the window, at an angle of
45 degrees, so as TO reflect the light on
the window covering.
The negative, if a film. should be
placed in the prepared position, with a
piece OF ground glass at the back, and
a piece of plain glass between it and
the camera. The image on the negative
should be upside down. Next remove
the back Of the camera, including the
ground glass, etc, and place ii in DO
sition on a table. with the back to the
opening, so that it covers the negative
An ordinary drawing board. strapped
or otherwise fastened to a box. will
answer for d support for the sensitive
paper during the exposure After COW
ering the support with a piece of white
paper place il on the table, then oDen
the shutter of the camera as directed
for time exposures. The image of the
negative will then be projected upon
the paper.
The support viii have to be moved
either way until the size of the desired
enlargement is obtained. and the TO
cusinG done on the plain sheet of paper
by using the focusing arrangement Of
the camera. Use the largest stop for
focusing, but before the exposure, sub
stitute smaller one, according to the
light. Care should be taken that the
only light to enter the room should be
that passing through the negative and
through the lens of the camera.
Before the final exposure is made it
would be well to make a test unon a
strip of sensitive paper for the purpose
of determining the correct length of
exposure. Place the strip diagonally
across the focused image. Cover all
but a fourth of the strip, open the
shutter, and give an exposure of half
a minute, then uncover another fourth
and give another half minutes expos
ure. Repeat this until the remaining
then develop. The first fourth will
have been exposed two minutes, the
second, one and half; the third, one;
and the fourth thirty seconds. When
the developing has been finished it will
be seen which of these is correct.
Now pin piece of the sensitive pa
per of the required size upon the draw
ing board, being careful to have it lie
perfectly fiat. Everything is now ready
for the exposure. Open the SHUTTER and
give ii the correct length Of time, which
has been ascertained by the test.
The developing process is much the
same as that followed in the develop
ment of the negative and most of the
articles required will be found in the
outfit of the amateur.
HOW TO DEVELOP.
For those who prefer to mix their
own developer, the following formula
will give excellent results:
No. /: Oxalate of potash, s ounces;
hot water, "a ounces; acetic acid, IL
drains. No. 2: Photo-sulphate of iron,
ounces; hot water 16 ounces; acetic
acid, Il dram. No. 8: Bromide potas-
SUM, y ounce; water. l pint. Mix only
for immediate use and use cold.
Mix in a large tray 3 ounces of the
No. l solution, y ounce of the No 2,
and Il dram of the No. 3. Soak the
exposed print in the clean water until
limp; then pour off the water and flood
with the developed. taking care to rock
the tray to prevent bubbles.