d. Storage of Color Papers.
Manufacturers recommend that for short-
term storage (3 months or less), color papers should be kept at a
temperature of 50 degrees F or lower.
For long-term storage (4 months or
more), color paper should be kept at 10 degrees F or lower. In either case,
paper should be removed from storage the day before you intend to use it.
For best results, process the exposed color paper as soon as possible.
9.
Color Print Chemistry.
Over the last few years, the processing of color paper has been simplified
both in processing times and in the number of steps.
a. Using Kodak EP 2. EP 2 is a Kodak process which is used to develop
color prints made on Ektacolor paper. It is a two-step process, containing
EP 2 developer and bleach/fix (often called blix) which are supplied in
liquid concentrate form.
Directions for mixing are included with the
chemicals, and you should follow them closely.
(1) Processing procedures. When processing prints in EP 2, the print
is processed first in the developer; next, it enters the blix solution;
after proper fixing, it is washed and finally dried.
(a) Solution temperatures.
Chemistry.
The temperature
of
the
chemistry
for
EP
2
should be 91 degrees F.
Water wash. The temperature of the wash water should be at
91 degrees F +/- .5 (1/2 degree).
(b) Solution times (given for machine processing).
Developer - 3 min. 15 sec.
Blix - l min. 30 sec.
Wash - 3 min. 15 sec.
(2) Constituents of EP 2 chemistry.
b. Developer Components.
(1) Part "A" contains a buffer that stabilizes the pH and benzyl
alcohol that facilitates the dye forming reaction. Because benzyl alcohol
is lighter than water, it requires a lengthy mixing time (average 20
minutes). If it is not adequately blended, a tar precipitate forms in the
solution.
3-12
SS0514
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