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Monsanto Chemical Company Anniston Method No. 14-43-48 SUBJECT: Color of Aroclor on N.P.A. Scale ETjaiKD: Iiellige Po'clast Comparator Scope . The method is applicable to Aroclors 4465, 5460, or others having N.P.A. colors in the range 1 to 5. Procedure * E'arm the Aroclor is necessary to obtain pouring consistency. Fill the test cup of the Hellige Pocket Comparator, Model 605, with Aroclor, insert cup in the comparator, and compare against the color disc (No. 620c-50, Lubricating Oils and Petrolatum) which has N.P.A. colors from 1 to 5 in one-half steps. Report color to nearest l/4,, Clean the test cup with a mixture of CC14 and tjenzol, with final rinse of benzol. AlUS color numbers coincide with National Petroleum Association color ' number (1915). The relation of the N.P.A. color numbers to other color scales is tabulated below: NPA Color Nos. (1915) NPA Names 1/4 1/3 3/4 1 1-1/2 2 2-1/2 3 3 -1/2 4' 4-1/2 5 6 7 8 p - - . mm -. Lily white Cream white Extra pale Extra lemon pale Lemon pale Extra orange Orange pale Pale Light Red Dark Red Claret Red -- - Union Petroloum Co. _' - G H I J K L M N 0 P V. R - A-3TM Color Nos. Levibond Analysis Red Yellow Blue 200 510 1180 _ -' - -- 1 0.12 1.5 0.60 2 2.5 2.5 4.6 3 6.9 3.5 9.4 4 14.0 4.5 21.0 5 35.0 6 60.0 7 60.0 8 166.0 0.6 1.1 1.7 2.4 8.0 26.0 27.0 32.0 45.0 50.0 56.0 93.0 60.0 106.0 64.0 mm mm - - -- -- .55 .55 - .55 1.80 -- FAB: cm 1-26-45 Copied ty re 4/27/48 DSW 330882 STLCOPCB4077526