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I3A IT4.177-1983 (R2001)
- Photography (Chemicals) - Sodium Thiocyanate (reaffirmation and redesignation of ANSI/NAPM IT4.177-1983 (R1996))
- standard by International Imaging Industry Association, 05/01/1993
- Publisher: I3A
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Establishes the purity requirements and test methods for photographic-grade sodium thiocyanate crystals and solution (50%).