Document bZoyj1OwDOLVoV4xZz7poJbg

E, I. DU PONT DE NEMOURS & COMPANY KREBS PIGMENTS DEPARTMENT 256 VANDERPOOL STREET NEWARK. NEW JERSEY Serial No. KN-4&-36 Copy No. 1 NEWARK PLANT PIGMENT COLOR RESEARCH REPORT ELIMINATION OF BLOOMING IN RT-58S-D PLANT DEVELOPMENT Period Covered! February 1947 ~ April 1947. FILE: DATE: 12/28/48 N42182 DUP050067107 Copy tot #1 Huaerical file 2 Research Offlea (221,32} 3 * Library file (221,32) 4 - #10 Building Pile 5 - V, Chalupski - Plant Piles o w* r spengesan Serial Ho. KH-48-3* Copy So, l mm mm n<$mf C0L0B RESEARCH REPORT Final Report Titlei ELBSINATIOR OF BL00H2UG 18 RT*583-D FLA8T WMJQSWm Period Coireredt February 1947 to April 1947 Charge! A-IC-40 S0BH1TTSD tSZi DATS SUBHOTEDt DATE ISSUED! 12/28/48 DUP050067108 mmmmMJwm .a at*m piSljlliaBShgtl'6llld|ubS8vftbl[lOoTpwmffolBt t% mmmmm It was observed that lacquer panels of RT-588-D (formerly coded RT-551-0 (A) or RT-2292-D) showed "blooming tendencies. In the laboratory a run was made reducing the amount of the exoess "Naphthaail" MB to 7$, with satisfactory yield and tinctorial results* Hie plant agreed to assume the development of the revised formula. mmm.. Four plant batches were made on the reduced H-A3D formula end evaluated in lacquer for "blooming", three of the lots shewed a decided and one did not. Because of satisfactory tinctorial and yield results th excess H-ASD formula was adopted for future manufacture* GSNBBAi DISCUSS10H ^ the following table gives the "blooming" results on the four plant lots EXPEB13SNTAL DETAILS H.B. 1245-40 Bval* of 4 plant lots in lae<per w bbs s s r Letter of AAB to VC of 2/24/4? Memorandum of ADM on 2/25/47 ESHi 48-35. DUP050067109