Document ppopvEYBxVMQ1N0k5YrjJGgOX

* I 4 i i v E. I. DU PONT DE NEMOURS & COMPANY KREBS PICMENTS DEPARTMENT 256 VANDERPOOL STREET NEWARK. NEW JERSEY Copy No. 1 ft NEWARK PLANT PIGMENT COLOR RESEARCH REPORT RT-573-D, SDff-WORKS AND PLANT DEVELOPMENT Period Covered; December 1947 - M*J 1?48 FILE. DATE; 10/18/43 \ N42167 o w - 3 a, RT-573-B The Valsp&r Corporation desired a dark type RT-530-P Ter the Hudson Hotor Oar Maroon. A laboratory etudy was aade whisk resulted ia the ART-573-D process, Seati-lorke and plant development studies were undertaken sad the results ere listed belov. 1, Two identical batches were aade la the semi-works on the ART-573* formula and sere equal tinotorially to the laheratery material* 2. from the grinding study made la the semi-works on let 5439* It was decided that high speed pulverisation was necessary to obtain suitable pigment fineness. 3. light batehes were made in the plant and all were satisfactory. 4. Production assumed supervision of ths manufacture of RT-573*D on April 21, 1948 and the Sales Department approved the standard (lot 53246, SD-48590) on Hay 5, 1943. 5. The property data of lot 53246, SD-48590 is as follows! a. Oil Absorption 45.8# of vehicle/10# Pig. b. Dry Fineness 19.25$ retained on 325 mesh screen s Speoific gravity 1.464 4. Moisture content 0.9$ Oeaplets results will be found in the DSH-48-20 severing both the ssais-works and plant developments, Following is a table listing the readings Of oaoh lot, tested in our oen laoquer (OT-36). Sample 9439 9440 1162-39 1162-39 Masstone ,Junta! . . 90/l0 Extension equal . eoual............... 53246 53272 54274 54307 1162-39 1162-39 1162-39 1162-39 vs dark equal dark e dark equal qaoi e^ial equal 53272 54274 54307 55926 55991 56026 56063 53246 53246 53246 53246 53246 53246 53246 we light e dark ve dark we dark vs dark light e int. equa equal equal Wi wk - v bl we *fc - bl . we etr tr hi DUP050067017 iises* ea# determined on four portions of lot 9439 in the semi-works and tho results follow* 1. Lot; 9441 20.0* Retained 1 Regular pass 1 High speed pass 2* lot9442 2 Regular pane 42*2* Retained 3. Lot 9443 2 Regular passes 36.4* Retained 4. Lot 9444 1 High speed pass 24,2* Retained jgjgjggggjggg, KN-48-20 Laboratory Development DSN-48-20 Seal-Works & Riant Development FIR #148 of 12/31/48 and 1/26/48 R.B. 1162* 30 - Eval. lot 9439 31 - Eval. lots 9440, 9441, 9442, $443 end 9444 39 - Eval. Plant lota 53246 4 53272 45 - Eval. Plant lots * , 54274 4 5+307 54 - Eval. Plant lot# 55926, 55991* 58026, .56063 DUP050067018