Document 10Kx6KV9RdwGXXMbKvEe00bJq

E. 1. DU PONT DE NEMOURS & COMPANY PICMENTS DEPARTMENT 256 VANDERPOOL STREET NEWARK, NEW JERSEY KH46~70 Copy No. 1 Numerical File h{A /-^r7^ NEWARK PLANT PIGMENT COLOR RESEARCH REPORT Final Report RT-525-D (DYE TYPE). DEVELOPMENT AND STANDARDIZATION. SEMI-WORKS AND PLANT Period Covered, MAY 1945 TO MARCH, 1946. FILE: DATE. 222,24 11/5/46 N39963 Serial No. KN-46-70 Copy No. i Copy to* #1 - Numerical File 2 - Research Office (222.24) 3 - Library File (222.24) 4 - #10 Building File 5 - V. Chalupski - Plant Files y6 - Imperial Chemical Industries. Ltd. _ if ( ft if 8- 11 It 9 - W. F. Spengeman, Newark NEWARK PLANT PIGMENT COLOR RESEARCH REPORT FINAL REPORT RT-525-D (DYE TYPE). DEVELOPMENT AND STANDARDIZATION SEMI-WORKS AND PLANT. MAY 1945 TO BIARCH, 1946. SUBMITTED BY* APPROVED BY* BATE SUBMITTED* 10/10/46 DATE ISSUED* 10/31/46 N39963.01 DUP050150143 - 1- jmmiiQRi RT-525-D, the manganese toner of Red 2B, made from dye, was standardized in the semi-works in 1941. So plant production was made and the color became inactive due to the war. In May 1945, production was resumed in both semi-works and plant. This report covers the semi-works and plant manufacture from May 1945 until the process was turned over to the plant in March 1946. 1. A new standard for RT-525-D has been set up and designated SB-48404 (lot 8457). 2. A new formula, K-2285, of double the size of the preceding K-1255, has been written and accepted. 3. The plant assumed supervision of the color in March, 1946. 4. A high percentage of OK Straight should be attained. 5. Production on the K-2285 formula has been discontinued in favor of the more economical direct laking formula now in process of development. EXPERIMENTAL DETAILSi Production was begun in May, 1945, with two semi-works batches to fill small orders. Both were fairly close to standard, and OK in bleed. All further production was made in the plant. Six 323 pound batches and eleven 646 pound batches were made in the plant. The large size batches were exactly double the small size in all respects, and differed only in the vats used. No variable study was made. Most of the 323 pound batches were poor in bleed due to contamination. When this was eliminated the bleed became acceptable. Equal portions of the first two of the 646 pound batches were mixed and set up as standard. Eight of the nine following batches were OK Straight against the old standard. The new formula, K-2285, was set up in March, 1946, with no change from the preceding formula, K-1255, except doubling the batch size, and adjusting the "as is" yield for the moisture content of the new standard. Details of the batches covered in this report can be found in Development Section Notebook 46-44. DUP050150144