User manual POLAROID T-72 FILM DATA SHEET

[. . . ] Film Data Sheet T-72 4 x 5 Black & White Sheet Film Description 3URIHVVLRQDO % : 6KHHW )LOP [ LQFK [ FP A panchromatic, medium-contrast film producing fine grain prints with excellent gradation and tonal range. Key Applications 7\SH 3ROD3DQ ILOP · Professional photography proofing · Test shots of less than 1/10 second or with strobe · Scientific imaging (strobe or shorter exposures) Compatible Hardware · Any camera or instrument equipped with a Model 545/545i Film Holder Special Treatment Processing the film for longer than 3 minutes may affect image contrast and density to some extent. For optimum image stability at temperatures above 75°F (24°C), film should not be processed for longer than one (1) minute. [. . . ] (9 x 11. 7 cm) Finish Glossy Reciprocity Performance Indicated Exposure (sec. ) < 1/15 1 4 16 64 128 Effective Film Speed (ISO/DIN) 400/27 250/25 200/24 125/22 80/20 64/19 2 Exposures per Unit 20 exposures per box Exposure Adjustment None + /3 f/stop +1 f/stop +21/3 f/stop +12/3 f/stop +22/3 f/stop Development Time 55 seconds at 70°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 trademark of Polaroid Corporation, Waltham, MA 02451 USA. Film Data Sheet Technical Data T-72 (4x5 sheet), T-572 (4x5 pack) and T-672 (pack) The information below represents the typical performance of Polaroid's Polapan 400 black and white films. Specific film lots may vary. 400/27o 55 seconds at 70oF/21oC Panchromatic 20 - 22 line pairs/mm Medium Recommended speed (ISO) Recommended processing time and temperature Spectral sensitivity Resolution (1000:1) Contrast Characteristic H&D curve for normal, hot and cold development 3 550F/130C 700F/210C 950F/350C 2 Processing time and temperature For best results process at temperatures above 60oF(16oC). o F o C Time in seconds 30 30 30 45 60 90 Exposure Adjustment -2/3 stop -1/3 stop None None None 1/3 stop Sample Density 1 0 -3 -2 Relative Log Exposure -1 0 95 85 75 70 65 55 35 29 24 21 18 13 Characteristic curve for normal, under and over development 3 H&D Curves @ 70oF/21oC 30 sec. 180 sec. At 71o F/21o C: D-Max = 1. 70 D-Min = . 10 Slope = 1. 65 Sample Density 2 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 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. [. . . ] 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. Speed variation relative to color temperature 3200 K -1/3 stop o 4800 K - o 5500 K - o 6500 K - o 7500 K +1/3 stop o 10, 000 K +1/3 stop o [. . . ]