Journal of the Society of Motion Picture Engineers (1930-1949)

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May, 1930] STOP BATHS AND FIXING BATHS 505 170 £ 130 °, t 90 3.0 4.0 2to no so CHROME. MAJM FRE.S.H FRELSH \ WE.E.K FELELT PELR &f\L.V-ON \ WE1E.K 100 2.00 30O 40O 500 foOO 100 600 FIG. 11. Effect of exhaustion with acid revival on the hardening properties of a plain 3 per cent chrome alum stop bath (D-76 developer, 70 °F.). v> 170 r Q 90 3.0 Z % CHROME ALUM O MELTING • RETICULATION R-REV/VAL FRESH 3.0 4.0 FEET PER. / MEEK zoo 300 -100 JOO 700 800 FIG. 12. Effect of exhaustion with acid revival on the hardening properties of a plain 2 per cent chrome alum stop bath (D-16 developer, 85 °F.).