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ANSI IT4.227 81st Edition, 1987 POTASSIUM METABISULFITE
ANSI IT4.229 1987 Edition, 1987 PHOTOGRAPHY (CHEMICALS) - POTASSIUM CARBONATE, ANHYDROUS AND SESQUIHYDRATE
ANSI IT4.230 82nd Edition, May 12, 1998 Photography (Chemicals) – Sodium Tetraborate, Pentahydrate and Decahydrate
ANSI IT4.231 82nd Edition, July 16, 1996 Photography (Chemicals) Sodium Metaborate Octahydrate
ANSI IT4.234 86th Edition, 1995 Photography (Chemicals)- Trisodium Phosphate, Dodecahydrate
ANSI IT4.24 1997 Edition, January 6, 1997 Photography (Processing) - Processing Trays and Tanks - Specifications
ANSI IT4.250 80th Edition, 1987 PHOTOGRAPHIC GRADE SODIUM THIOSULFATE, ANHYDROUS
ANSI IT4.252 80th Edition, 1987 PHOTOGRAPHIC GRADE AMMONIUM THIOSULFATE SOLUTION
ANSI IT4.275 80th Edition, 1987 PHOTOGRAPHIC GRADE SODIUM SULFITE,ANHYDROUS
ANSI IT4.276 80th Edition, May 12, 1998 SPECIFICATION FOR PHOTOGRAPHIC GRADE SODIUM METABISULFITE NA2S2O5 (SODIUM BISULFITE)
ANSI IT4.277 80th Edition, 1987 PHOTOGRAPHIC GRADE POTASSIUM METABISULFITE
ANSI IT7.207 1989 Edition, 1989 SELF-CONTAINED 2- X2-INCH SOUND/SLIDE PROJECTORS FOR FRONT/REAR PROJECTIONS USING COMPACT CASSETTES - PERFOMANCE CHARACTERISTICS