User manual POLAROID T-57 FILM DATA SHEET

Film Data Sheet T-57 4 x 5 Black & White Sheet Film Description 3URIHVVLRQDO % : 6KHHW )LOP [ LQFK 10.2 x 12.7 cm High-speed, medium-contrast, medium-grain, panchromatic general purpose black & white print film. ILOP 7\SH Key Applications +LJK 6SHHG Film Speed ISO 3000/DIN 36 · Electrophoresis gel documentation · Scientific documentation (especially applications involving low light levels) · Close-up photography Compatible Hardware Any camera or instrument equipped with a Model 545 or 545i Film Holder. Special Treatment Picture area approximately off center about 1/8 in. (3 mm) toward the thick end of the film holder. Does not correspond precisely with the image area indicated on the ground glass of most 4x5 cameras; for accurate composition, make test exposures and mark the picture area on the ground glass. Print coating is required to prevent the images from fading or discoloring. Format 4 x 5 in. (10.2 x 12.7 cm) Sheet Film Image Area 31/2 x 41/2 in. (9 x 11.4 cm) Finish Glossy Exposures per Unit 20 exposures per box Development Time 15 seconds at 75°F 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" is a registered trademark of Polaroid Corporation, Waltham, MA 02451 USA. Film Data Sheet Technical Data T-57 Instant B&W Peel-Apart Film This information represents the typical performance of Polaroid T-57 black and white film. Specific film lots may vary. Recommended speed (ISO) Recommended processing time and temperature Resolution (1000:1) Contrast Spectral sensitivity 3000 / 36o Characteristic H&D curve for normal, hot and cold development 3 55oF/13 oC 70oF/21 oC 15 sec. at 75oF/24oC 95oF/35 oC 14 - 17 line pairs/mm Medium Panchromatic Sample Density 1 0 -3 -2 Relative Log Exposure -1 -0 2 Processing time and temperature For best results process at temperatures above 60oF(16 oC). o F o C Time in seconds 15 15 20 30 45 Exposure Adjustment -1/3 stop None None None 1/3 stop 95 75-90 70 65 55 35 24-32 21 18 13 Characteristic H&D curve for normal, under and over development 3 H&D Curves @ 7 0 oF/21 oC 15 sec. 20 sec. 90 sec. 2 Sample Density 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. 1 0 -3 -2 -1 -0 Relative Log Exposure 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. Film Data Sheet Technical Data T-57 Instant B&W Peel-Apart Film Reciprocity law failure A wide range of shutter speeds can be used without loss of film speed. For longer exposure times, some exposure compensation is suggested. Reciprocity Law Failure 0.5 0.0 100 Modulation Transfer Function Speed Change (f-stops) -0.5 -1.0 80 % Modulation .001" .01" .1" 1" 10" 100" -1.5 -2.0 -2.5 -3.0 60 40 20 -3.5 Exposure Time (seconds) 0 1 2 3 4 Spatial Frequency (cycles/mm) Filter Factors Filter n o. Light source at 3200oK - T ungsten Aperture adjustment (f -stops) Filter f actor (exposure multiplier) Light source at 5500oK - Daylight Aperture adjustment (f -stops) Filter f actor (exposure multiplier) 6 1/3 8 1/2 15 2/3 25 1 1/2 47 3 1/2 58 3 1/2 CRT Exposure Index* Phosphor 0.5 Density** Intercept P-4 P-11 1.3 1.4 1.6 2.8 11.2 11.2 * Value measured in reciprocal ergs/cm^2 to obtain desired density. Exposure duration is 1/125 second. ** 0.5 density intercept is comparable to the 0.6 net density given for most conventional negative films. 119 140 230 104 97 P-16 P-24 2/3 1 1 1/3 2 1/2 2 2/3 3 1/3 P-31 1.6 2 2.5 5.6 6.3 10 Speed variation relative to color temperature 3200oK -1/3 stop 4800oK 5500oK 3000 6500o K 7500 oK 10,000o K +1/3 stop Reciprocity: The ability of the film to respond in a constant manner to a constant exposure (light intensity x time). Reciprocity failure occurs during very long or very short exposures, requiring the photographer to increase exposure. Spectral Sensitivity: Shows the equivalent energy needed at each wavelength in order to activate the emulsion so that it produces a neutral density of .75.