User manual POLAROID T-51HC DATASHEET

[. . . ] Film Data Sheet T-51HC 4 x 5 Black & White Sheet Film Description 3URIHVVLRQDO % : 6KHHW )LOP [ LQFK 10. 2 x 12. 7 cm High-contrast, 4 x 5 positive and negative sheet film for detailed black & white prints. Key Applications · Copystand photography · Fingerprint documentation · Graphic arts 7\SH +& 3RV1HJ ILOP Compatible Hardware · Any camera or instrument equipped with a Model 545/545i Film Holder · MP-4+ camera Special Treatment Film Speed ISO 640/DIN 29 (Positive/daylight) ISO 400/DIN 27 (Positive/tungsten) ISO 80/DIN 20 (Negative/daylight) ISO 50/DIN 18 (Negative/tungsten) 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. [. . . ] 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. All other product names may be the property of their respective owners. Film Data Sheet Technical Data T-51HC High Contrast (4x5 sheet) Instant B&W Peel-Apart Film (HDC) This information represents the typical performance of Polaroid T-51HC film. Specific film lots may vary. Recommended speed (ISO) Recommended processing time at o o 70 F/21 C Spectral sensitivity Resolution (1000:1) Print: 640/29 o@ 5500 K 0 Neg. : 80/20o @ 55000K 30 seconds Panchromatic Print: 20 - 30 line pairs/mm Neg. : 100 - 120 line pairs/mm Characteristic H&D curve for normal, hot and cold development 3. 0 55oF/13oC Contrast Print: High Neg. : Medium 2. 5 70oF/21oC 85oF/29oC Sample Density Processing time and temperature For best results process at temperatures above 60oF(16oC). o 2. 0 F o C Time in seconds 30 35 50 Exposure Adjustment None None None 1. 5 70-95 65 55 21-35 18 13 1. 0 0. 5 Effect of over/under development Beyond compensating for the effects of high and low temperatures, this film can be over or under developed for positive contrast modulation. Over development produces higher contrast and lower densities in the positive. Neither over nor under development has any significant effect on the negative contrast. Under development can result in an increase in negative D-Min. Characteristic H&D curve for normal, under and over development 3. 0 25 seconds 30 seconds 120 seconds 0. 0 -3. 0 -2. 5 -2. 0 -1. 5 -1. 0 -0. 5 0. 0 Relative Log Exposure D-Max: The density value for the film's darkest black. 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. 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. 2. 5 Sample Density 2. 0 1. 5 Positive 1. 0 Negative 0. 5 0. 0 -3. 0 -2. 5 -2. 0 -1. 5 -1. 0 -0. 5 0. 0 Relative Log Exposure Film Data Sheet Technical Data T-51HC High Contrast (4x5 sheet) Instant B&W Peel-Apart Film (HDC) Reciprocity law failure A wide range of shutter speeds can be used without loss of film speed. [. . . ] (avdp) Exposure Time (seconds) 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 1000 100 Modulation Transfer Function Spectral Sensitivity 100 80 % Modulation 400 450 500 550 600 650 700 750 60 10 40 1 20 0 350 0 0. 1 0. 25 1 2. 5 4 Wavelength (nm) Spatial Frequency (cycles/mm) [. . . ]