P-S-683B, FEDERAL SPECIFICATION: SOUR, LAUNDRY (FLUORIDATED) (20 APR 1956) [S/S BY A-A-1374]

P-S-683B, FEDERAL SPECIFICATION: SOUR, LAUNDRY (FLUORIDATED) (20 APR 1956) [S/S BY A-A-1374]., This specification covers two types and one grade of laundry sours suitable for use in washing formulas (see 6.1).