Evening star., 1948-07-04
Camera Angles
Making Projection Slides

negative between two pieces of
clean, hawless glass, held in posi-
tion by a framework which is stood
on end so as to face the camera
Care must be exercised here to in
sure that the focal plane of the
camera is parallel to the negative.
A light is placed behind the mega
tive and the exposure is made by
transmitted light. A diffusing
screen may be placed between the
light source and the negative for
better results. Your lodging may
be accomplished either between the
camera lens and the negative, or
between the negative and the light.
AS with the development of paper
prints, you should observe the prac-
tice of getting the exposed slide
plate into the developer in one
smooth sliding motion so that even
development will occur. Allow the
slides to develop to the greatest
possible allotted latitude so that a
brilliant image of full contrast is OBJ
tained with an appreciable amount
of high-light density. This is best
done by the inspection method of
development if you are using a
series o or GA safelight.
After the slides have been thor
oughly fixed and washed for not less
than Is minutes, they should be
sponged of to eliminate the posi-
bility Of water spot formation. This
is best accomplished with a viscose
sponge or soft, grit-free cloth.
Mounting the Slides.
When, the slide is dry you can pro-
ceed with the binding operation
which is absolutely necessary. An
unbound slide will be ruined in NO
time despite a maximum of care in
handling. You will need one clear
glass the same size as the slide
itself. This glass is placed over the
emulsion of the slide and the two
are then bound together with strip
of binding tape. If your slide is
3A by 4 inches, cut 151a Inch strip
of binding tape and moisten the
back until it becomes limp.
Then place the tape, gummeo
side up on your work table ano
moisten the face of the strip. Place
the slide, with cover glass properly
aligned. on the tape in such a way
that one end of the tape is bisected
by the center edge of one side OF
the slide. Press the slide against
the tape until the two thoroughly
adhere Now, turn the slide over on
the tape so that it adheres to the
other side. Repeat this procedure
along the other sides OF the slide
until you get back to the starting
point Go back over the entire slide
and press the tape firmly against
the edges of the slide, all the way
around, until you are certain that
the slide is securely and perma-
nently bound. Finish the job by
clipping out the corners of the tapt
and once more firming the tape te
the glass at these points.
All this will take practice before
perfection is achieved, and it is ou,
advice that you try the job severa.
times with two sheets Of clear glass
until you are able to handle the
glass and tape without the glasses
slipping as you perform the Job
Later on. if you decide to go in fol-
glass slides in a big way. you will
probably find 1t advisable to buy
revolving lantern slide wise which
will allow the use of both hands fol
the taping process.
/ Finally, spot your slide with q
| piece of gummed paper in the lower
| left-hand corner Of the emulsion
side with the image In an unrigh1
position. This will Cake it easy fel
you to select the proper position fol-
the slide to be inserted in the pro.
jector-image inverted and With
emulsion side Of the slide towart
the protector lamp.