DEVELOPING TANK
Transcription
DEVELOPING TANK
DEVELOPING TANK INSTRUCTIONS AGITATOR-ROD - .....~ THERMOMETER COVER~~_ TANK TANK COVER AGITATOR-ROD THERMOMETER EQUIPMENT In addition to the deve loping tank, you will need the following items : 16 oz graduate, plastic funnel, stirring rod , sponge, and film c lips . SETIING UP The kitchen is a good place for film developing (if you don't have a darkroom) . Cover the sink drainboard, or other sur face selected for w..QLk, with several layers of newspaper. Check the temperature of the processing solutions with the agitator-rod thermometer ':' supplied with your GAF Develop ing Tank; the temperature of the solutions should be 68F (20C). For an accurate reading , give the thermometer time to reach the temperature of the solution. * Check your thermometer; if the spirit-line indicating the temperature has separated (due to vibration during shipment), rejoin it by shaking the thermometer as you would a fever· thermometer. If the solutions are too warm, set them in a tray of cold water until they cool off; if they are too cold, use warm water. When the solutions have reached the desired (68F) temperature, fill the tray with 6 8 F water to keep the solutions ready for use . If you don't have a tray, use the kitchen sink . Keep the water level in the sink low; the bottles should not be immersed be· cause water may seep in and dilute the solutions. ADJUSTING THE REEL three positions, indicated by click-stops_ The reel is adjusted for 120 and 620-size films when the top of the transparent flange is flush with the top of the reel -core_ When the trans parent flange is moved one notch toward the black flange (Fig _ 1), the reel is adjusted for 127-size film _ When the transparent flange is moved down as far as it will go, the reel is adjusted for 35mm, 828, and 126-size films_ 1 LOADING THE FILM The film must be loaded in complete darkness _ If you don't have a darkroom, use a closet at night, or an inexpensive "changing bag" (sold in camera stores)_ Be sure that the room or closet in which you load the tank is completely dark_ Stay there at least f ive minutes before you open the film, to let your eyes get used to the darkness_ The reel must be CLEAN and DRY_ The corners of the film that enter the grooves of the reel shou Id be rounded off slightly_ Cut off the tapered leader of 35mm films between perforations_ To open a 35mm magazine (in the dark), rap sharply the pro truding end of the spool on a hard surface_ The opposite end cap of the magazine will pop off, allowing the removal of the · spool with the film . Leave the film on the spool; it is now ready for loading . Use care to keep the film perpendicular, not permitting it to swing back and forth, like a pendulum_ With roll films, only the seal has to be broken and the protec tive paper wound off until the film is reached. Peel away the paper from the film , cutting free the end that is attached to the paper. With 126-size (instant-loading type) cartridges, remove the film by breaking the cartridge apart; the film is then handled as a roll film. HAN DLE TH E FI LM BY THE EDGES ONLY; touching the emulsion-side may leave permanent marks. Insert three or four inches of film into the reel by pushing it through the entrance slots (at the thickest part of the flanges), as shown in Fig. 2_ 2 Take hold of the edges of the reel. The clear flange is in the left hand, the black flange is in the right. Twist the black flange forward (away from you), as far as it will go, then twist it back (toward you), as far as it will go (Fig. 3)_ Repeat this until all of the film is wound on the reel. When you load a 35mm film , it will stop when the spool reaches the entrance. Cut the film at the edge of the spool and continue winding. 3 Two slight clicks are heard when the end of the film passes the entrance. Make sure that all of the film is wound on the reel by running your finger around it; the edge you feel should be past the entrance (your finger will not mark the film, since the emulsion is inside). If the film does not go on the reel smoothly, do not force it. Pull off the adjustable flange, remove the film, and start to load it again. Do not attempt to pull the film back through the film entrance. Place the loaded reel in the tank (with the clear flange on top). Put on the cover; lock it by turning it clockwise. The room light may now be turned on. NOTE: The GAF Developing Tank has a truly "easy loading" reel. To make sure that loading will be as smooth as it can be, remember the following points: 1. The end of the film that enters the reel should have slightly rounded corners. On 35mm films, cut off the tapered leader between perforations, not through the holes. 2. The reel must be perfectly dry. If you must develop more than one roll of film, it is better to use a separate reel for each roll (additional reels may be purchased at your dealer). Even small droplets of water (not visible in the grooves) may interfere with the smooth loading of the film (this is true of all reel-type plastic tanks). 3. Chemical residue should not be allowed to accumulate on the clips, in the grooves and under the rollers. It is important to clean them with warm water (not hot) after each use. Clean the entire length of the groove in each flange with cotton wrapped around the tip of a toothpick. Pay special attention to the part under the roller, and to the roller itself. 4. Do NOT use hot water to clean your tank or reel, and do not store it near a radiator or other source of heat. Tem peratures over 140F (60C) may damage the plastic. A heat-damaged reel is difficult to load. PROCESSING The following GAF lab"Oratory-tested chemicals are-,eCOnT mended: HYFINOL®-L fine grain, high acutance developer and GAF Acid Fixer with Hardener. Pour the required amount of developer into the graduate, according to the following table: Film size 120,620 127 35mm, 126. 828 Required amount of solution 160z 120z 90z I flruugfl rfle uiJemng In rne cenrer OT tne cover, pour rne developer from the graduate into the tank, as fast as the tank will take the solution. As soon as the developer is in the tank, insert the agitator rod and turn it back and forth briskly, 5 or 6 times (Fig . 4); then pick up the ta n k (without ti Iti ng it) and rap it sharply against the newspaper covered working surface to dislodge the air bubbles adhering to the film. Agitate for about five seconds during each half minute by turning the agita tor-rod back and forth. Develop for the time rec ommended for the film/de veloper/temperature com bination you use. 4 While the film is being developed, rinse out the graduate and fill it with the required amount of short stop. If you do not use a shortstop, fill the graduate with the fixer. When developing is com pleted, pour the developer through a funnel back into its bottle. Pour the short stop Into the tank and agi tate continuously for about 5·10 seconds, then pour it back into the bottle. The shortstop may be prepared by adding acetic acid to 16 oz of water. % oz of 28% If you do not use shortstop, fill the tank with about 68F water, agitate for about 5 -10 seconds, then pour out the water . Pour in the fixer (Fig . 5) . Agitate frequently during fixing . Fix for the time recommended in the instructions supplied with the film and/or the fixer, then pour the fixer back into its bottle. The cover of the tank can now be removed . Wash the film for at least 1/2 hour with water (at about 68F) running into the hole at the center of the reel (Fig. 6) . When washing is completed, take off the top (clear) flange, attach a film clip to the end and lift the film off the reel (Fig. 7) . With a wet, squeezed out photographic viscose sponge (a soft sponge sold in photo supply stores) wipe both sides of the film, very gently, to remove excess water. As an alternative, you may dip the film into a solu tion of GAF® Wetting Agent, and hang it up to dry with out wiping . Follow the in structions on the wetting agent bottle. Attach a film clip to the other end of the film and hang it up i n a dust-free place to dry. When dry, cut the film into ; , - _ •• _ ............ ...., _ . ..... ...., ..... t:> ................... . bubbles adhering to the film. Agitate for about five seconds during each half minute by turning the agita tor·rod back and forth. Develop for the time rec· ommended for the film/de· veloper /temperature com· bination you use. While the film is being developed , rinse out the graduate and fill it with the required amount of short· stop. If you do not use a shortstop , fill the graduate with the fixer . When developing is com· pleted, pour the developer through a funnel back into its bottle. Pour the short· stop into the tank and agio tate continuously for about 5·10 seconds, then pour it back into the bottle. The shortstop may be prepared by adding acetic acid to 16 oz of water. % oz of 28% If you do not use shortstop, fill the tank with about 68F water, agitate for about 5·10 seconds, then pour out the water. Pour in the fixer (Fig. 5). Agitate frequently during fixing. Fix for the time recommended in the instructions supplied with the film and/or the fixer, then pour the fixer back into its bottle . The cover of the tank can now be removed. Wash the film for at least V2 hour with water (at about 68F) running into the hole at the center of the reel (Fig . 6). When washing is completed, take off the top (clear) flange, attach a film clip to the end and lift the film off the reel (Fig. 7). With a wet, squeezed out photographic viscose sponge (a soft sponge sold in photo supply stores) wipe both sides of the film, very gently, to remove excess water. As an alternative, you may dip the film into a solu· tion of GAF® Wetting Agent, and hang it up to dry with· out wiping. Follow the in · structions on the wetting· agent bottle. Attach a film clip to the other end of the film and hang it up in a dust·free place to dry. When dry, cut the film into conven ient lengths and store the strips in protec · tive glassine envelopes. 7 You may also process GAF® Color Slide Films. using the 16 ounce GAF® Color Slide Film Processing Outfit. Detailed instructions are packed with the chemicals . GAF Co rp ora tio n 140 West 51 St reet . N ew York. N .Y. 10020 Made and printed in USA .. C-12053-10 \~ ;. o ... 62