Polaroid T-85 User Manual
Film Data Sheet
T-85
Black & White Pack Film
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85
Film Speed
ISO 80/DIN 20
Format
1
3
/4 x 33/8 in. (8.3 x 8.6 cm)
Pack Film
Image Area
3
2
/4 x 27/8
Finish
Glossy
Exposures per Unit
10 exposures per pack
Development Time
30 seconds at 65°F (18°C) and above
in. (6.9 x 7.2 cm)
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Description
Medium-speed, medium-contrast, fine-grain film which produces
high quality black and white prints and negatives suitable for
enlarging.
Key Applications
• Old time photography
• Portraits
• Professional photography proofing
Compatible Hardware
• Cameras or instruments with CB-1034 or CB-80 camera backs
• MiniPortrait Camera models M484, M485b, M486V , and M488V
• ProPack Camera
Special Treatment
Requires print coating the positive and clearing the negative to
prevent fading and discoloration. T o clear the negative for reuse,
immerse it in a sodium sulfite clearing bath within 3 minutes 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.
T o 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.
Caution
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.
Limited Warranty
See information on the film box.
“Polaroid” and “ProPack” are trademarks of Polaroid Corporation, Waltham, MA 02451 USA.
All other product names may be the property of their respective owners.
Film Data Sheet
Technical Data
T-85, T-665 (positive/negative)
Instant B&W Peel-Apart Pack Film
The information below represents the typical performance of Polaroid’s T-85 and T-665 black and white peel-apart film.
Specific film lots may vary.
o
Recommended
speed (ISO)
Recommended
processing time
and
temperature
Resolution
(1000:1)
Contrast
Spectral
sensitivity
80 / 20
30 sec. at
o
F/21oC
70
13 - 16 line
pairs/mm (print)
160 - 180 line
pairs/mm
(negative)
Medium
Panchromatic
Characteristic H&D curve for normal,
hot and cold development
3
o
o
55
F/13
C
o
70
F/21oC
o
F/35oC
95
2
Processing time and temperature
For best results process at temperatures
above 60oF(16oC).
o
F
85+ 29+ 30
75 24 30
70 21 30
65 18 30
60 15 40
50 10 60
o
C
Tim e in
seconds
Filter factors
Filter no. 6 8 15 25 47 58
Light source at
o
3200
K - Tungsten
Light source at
o
5500
K - Daylight
Aperture
adjustment
(f-stops)
Filter factor
(exposure
multiplier)
Aperture
adjustment
(f-stops)
Filter factor
(exposure
multiplier)
Pos.
Sample Density
1
0
At 70oF/21oC: D-Max = 1.90(P) D-Min = .10(P) Slope = 1.40(P)
1.42(N) .23(N) .70(N)
1/2 2/3 1 2 1/2 3 2/3 3
1.4 1.6 2 5.6 12.6 8
1 1 1 1/3 3 1/2 3 3
2 2.5 2.8 11.2 8 8
Neg.
-2 -1-3 -0
Relative Log Exposure
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.
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