T-64 tungsten instant color peel-apart films, Film data sheet technical data, Characteristic h&d curves for normal development – Polaroid T-64 User Manual
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Processing time and temperature
For best results process at temperatures
above 60
o
F(16
o
C).
The information in this film data sheet
represents the typical performance of
Polaroid’s T-64 Tungsten color films.
Specific film lots may vary.
Film Data Sheet
Technical Data
T-64 Tungsten
Instant Color Peel-Apart Films
D-Max: The density value for
the film’s darkest black.
D-Min: The lowest density
value that a film exhibits. In
prints, the whiteness of the
brightest highlight, relative to
the unprocessed print.
Slope: The positive ratio of the
log E increments of the straight
line region of the curve, as
determined by the 1/4-3/4
increment method. The slope
of an H&D curve indicates the
overall contrast of a film: low
contrast slopes less than 1.10;
medium contrast slopes from
1.10 to 1.70; high contrast
slopes greater than 1.70.
Recommended
speed (ISO)
64 / 19
o
Recommended
processing time
and
temperature
90 sec. @
70
o
F/21
o
C
Resolution
(1000:1)
10 line
pairs/mm
Contrast
Medium - High
0
-2
-1
0
1
2
Relative Log Exposure
3
Sample Density
-3
H&D Curves @ 70
o
F/21
o
C
Characteristic H&D curves for
normal development
Blue
R e d
G r e e n
Sample Density
Relative Log Exposure
-3
0
-2
-1
0
1
2
3
Blue
Red
Green
H&D Curves
@ 55
o
F/18
o
C
Characteristic curves for
cold development
Sample Density
Relative Log Exposure
-2
-3
-1
0
1
2
3
Blue
Red
Green
0
H&D Curves
@ 95
o
F/35
o
C
Characteristic curves for
hot development
o
F
o
C
Time in
seconds
Exposure
Adjustment
95
35
90
-1/3 stop
65-90
21-32
90
None
55
13
120
1/2 stop