Film
Color
Density
manufact.
deviation
variation
from
in color
reference
step
standard
Kodak
to blue-
blue density
magenta
is under red
density, green
density is under
red density
to yellow-
blue density
green
is under red
density, green
density is under
red density
Fuji
to red
red density
is under blue
and green
density
to blue-
red density
green
is under blue
and green
Agfa
red
red density
is under blue
and green
density
to blue-
red density
green
is above blue
and green
density
* The JOBO pH Correction Kit (# 48OO) is available for easy modification of the pH value.
It contains both solutions (acid and base) already diluted, which can easily be measured
with the enclosed graduate according to the indications in above table.
14
Suitable amount
Approx.
acid or base added
change in
(10%)*
density
values in
color step
2 ml diluted
+ 0,05 to
sodium hydro-
yellow-green
xide per liter
color developer
2 ml diluted
+ 0,05 to
sulphuric acid
blue-
per liter
magenta
color developer
4 ml diluted
+ 0,05
sodium hydro-
to blue-
xide per liter
green
color developer
4 ml diluted
+ 0,05
sulphuric acid
to red
per liter
5 ml diluted
+ 0.05
sodium hydro-
to blue-
xide per liter
green
color developer
3 ml diluted
+ 0.05
sulphuric acid
to red
per liter
color developer
Fault
Possible Cause
Slides too light
Over-exposure
First developing
time too long
Contamination of
the first developer
with bleachfix
Slides too dark
Under-exposure
Prewarming of the
tank has been omitted
First developing
time too short
Uneven color areas,
Insufficient filling
streaks and stripes
quantity
Color fog
Mixing vessels or
processor are not
clean. Contamina-
tion of one developer with
another
Max. densities green
Contamination of
the color developer
or first
developer
with the stabilizer
D-max too light:
Contamination of
blue (depending on
the first developer
the contamination
with color
ratio)
developer
Drying spots
Too hard tap water
on the dry film
when preparing the
stabilizing bath
Remedy
Check camera and
exposure
Shorten developing time
by 15-30 s
Rinse equipment and reel
thoroughly
Check camera and
exposure
Add a prewarm time
of 5 min to the program
Extend developing time by
15-30 s
Check filling quantities.
Tanks and reels must be
absolutely dry.
Fill in first developer quickly.
Use individual mixing
vessel and mixing rod
for each bath
Clean reels immediately
after stabilizing or
put the films into the
stabilizer without reels.
Never fill the
stabilizer into the ATL!
Refer to the hint given
under mixing instruction.
Never use the same vessels
or mixing rods for the
first and the color
developer.
Mix tap water with
distilled or deminerali-
zed water in the pro-
portion 1:2. In addition,
use a JOBO film wiper.
15