(a) For picture negatives and motion picture preprints (negatives, masters, and all other copies) of permanent, long-term temporary, or unscheduled records, use polyester base media and process in accordance with industry standards as specified in ISO 18906 (incorporated by reference, see § 1237.3).
- (1) Ensure that residual sodium thiosulfate (hypo) on newly processed black-and-white photographic film does not exceed 0.014 grams per square meter.
- (2) Require laboratories to process film in accordance with this standard. Process color film in accordance with the manufacturer's recommendations.
- (3) If using reversal type processing, require full photographic reversal; i.e., develop, bleach, expose, develop, fix, and wash.