Polaroid T-55 User Manual
Film Data Sheet
T-55 (Positive/Negative)
4 x 5 Black & White Sheet Film
Description
Extremely high-resolution positive/negative film for finely
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10.2 x 12.7 cm
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detailed black and white prints (and negatives). Medium-speed
and contrast, produces instant print and negative.
Key Applications
• Proofing
• Scientific imaging
• Advertising and magazine photography
• SEM or microscope imaging
• Copystand photography
• Fine-art photography
• Any application requiring a negative for additional prints
Film Speed
ISO 50/DIN 18
Format
4 x 5 in. (10.2 x 12.7 cm)
Sheet Film
Image Area
1
3
/2 x 41/2
Finish
Glossy
Exposures per Unit
20 exposures per box
Development Time
20-25 seconds at 700F
This film uses a small amount of
caustic paste. If any paste appears,
avoid contact with skin, eyes and
mouth and keep away from children
and animals. If you get some
paste on your skin, wipe it off
immediately, then wash with
water to avoid an alkali burn. If eye
contact occurs, quickly wash the
area with plenty of water and see a
doctor. Keep discarded materials
away from children, animals,
clothing and furniture.
in. (9 x 11.4 cm)
Caution
Compatible Hardware
• Any instrument or camera equipped with a Model
545/545i Film Holder
• MP-4+ Camera
Special Treatment
Requires print coating the positive and clearing the negative. To
clear the negative for reuse, immerse it in a sodium sulfite clearing
bath immediately after development. Sodium sulfite powder is
readily available from professional photographic supply dealers
and chemical supply houses.
Mix in the following proportions:
Warm water: 2 liter or 70 fl. oz.
Sodium sulfite powder: 440 grams or 16 oz. (weight)
(anhydrous/desiccated)
Slowly add the powder to the water; stir continuously until all
powder is dissolved. Allow to cool to approximately 700F(210C)
before using. Store the solution in brown, well-stoppered
bottles or in a tank with a floating lid.
To prevent scratches:
Negative scratch resistance can be improved by treating the
processed negative (after clearing in water and sodium sulfite)
in a solution of Kodak Rapid Fix with Hardener (parts A & B)
for two minutes. This solution should be made up and used in
accordance with Kodak’s recommended mix procedures,
chemical caution statements, wash times and temperatures.
Limited Warranty
See information on the film box.
“Polaroid” is a registered trademark of Polaroid Corporation, Waltham, MA 02451 USA.
All other product names may be the property of their respective owners.
Film Data Sheet
8
5
g
Technical Data
T-55 (Positive/negative)
Instant B&W Peel-Apart Film
The information below represents the typical performance of Polaroid’s T-55 black and white film.
Specific film lots may vary .
o
Recommended
speed (ISO)
Recommended
processing time
and
temperature
Resolution
(1000:1)
Contrast
Spectral
sensitivity
50 / 18
20-25 sec. at
o
70
F/21oC
20 - 25 line
pairs/mm
(print)
160 - 180 line
pairs/mm
(negative)
Medium
Panchromatic
Characteristic H&D curve for normal,
hot and cold development
3
2
Pos.
55oF/1
70oF/21
95oF/3
Processing time and temperature
For best results process at temperatures
above 60oF(16oC).
o
F
Time in
o
C
seconds
Exposure
Adjustment
75+ 24+ 20 sec. None
70 21 20 sec. None
65 18 35 sec. None
55 13 50 sec. None
50 10 60 sec. None
Characteristic H&D curve for normal,
over and under development
3
H&D Curves @
2
Sample Density
1
0
-3
o
70
F/21oC
.
Pos
-2 -1
Relative Log Exposure
15 sec.
23 sec.
90 sec.
Ne
Sample Density
1
0
-2 -1-3
Relative Log Exposure
At 70o F/21o C: D-Max = 1.65(P) D-Min = .01(P) Slope = 1.35(P)
1.55(N) .18(N) 1.65(N)
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
0
contrast slopes from 1.10 to 1.70; high contrast slopes greater than 1.70.
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