User manual POLAROID T-665 DATASHEET

[. . . ] 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. 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. [. . . ] Ingredients Metric 2. 0 liters 440 grams U. S. (avdp) 10 1 0 350 450 550 650 750 Wavelength (nm) Warm Water Sodium sulfite (anhydrous) 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. Type 665 Polaroid Positive/Negative Black & White Instant Pack Film First prepare the negative-clearing solution Do this before the film is exposed and developed. Immediately after development (within 3 minutes) the negative must be immersed in an 18% sodium sulfite clearing bath. Preparation of the 18% sodium sulfite solution Sodium sulfite powder is readily available from professional photographic supply dealers and chemical supply houses. Mix in the following proportion: - Warm water 2 liters 70 oz. (fluid) - Sodium sulfite powder 440 grams 16 oz. (avdp. ) (anhydrous/desiccated) Slowly add the powder to the water; stir continuously until all powder is dissolved. Store the solution in brown, well-stoppered bottles or in a tank with a floating lid. Loading, exposing and processing film See instructions supplied with your camera or film holder for detailed information. Important: For best results in the minimum density areas of the negative, separating the negative and preparing it for printing should be done in dim light. If that is not possible, extend the development time. (Such extended development will improve the minimum density areas of the negative and assist in negative clearing, but may reduce the quality of the accompaning Polaroid print. ) Separating the negative and print: At the end of the full recommended development time, peel the print away from the negative using a swift unhesitating motion. Be careful not to touch or scratch the image surface of the negative or the print. Coat the print immediately (see Coating and care of prints. ) Temperature is important Pictures may be exposed at any temperature, but the temperature of the film during development is important. Below 65°F (18°C), develop longer, as shown in the chart. At the lower temperatures, the speed of the negative will be reduced. Thus, a correctly exposed positive may be accompanied by a negative that is too thin. To get the best possible negative at these temperatures, give more exposure, so that you get a positive that is somewhat lighter than normal. Development below 50°F (10°C) is not recommended. Temperature 65°F+ 18°C+ 60°F 15°C 50°F 10°C Processing time 30 sec. [. . . ] Avoid scratching the negatives, by keeping them away from each other and from the sides of the container. Excessive washing may weaken the emulsion. Dip negative in wetting agent: To avoid drying marks, use a wetting agent (such as Kodak Photo-Flo diluted at least 1:600). Follow manufacturer's instructions for use. [. . . ]