Document B5dgx5wkzrob9YojY2dbv9aqE

E. I. DU PONT DE NEMOURS & COMPANY KREBS PIGMENTS DEPARTMENT 256 VANDERPOOL STREET NEWARK. NEW JERSEY Serial No. KN-46-80 Copy No. 1 NEWARK PLANT PIGMENT COLOR RESEARCH REPORT RT-357-D DEVELOPMENT AND STANDARDIZATION OF ECONOMY PROCESS, K-2301. Period Covered: November 1944 - July 1946. FILE: DATE: 11/27/46 NJCI7B ______ .. N37984 Copy toi #1 * Numerical File 2 - Research Office (223*21) 3 library File (223*21) 4 * #10 Bu&Misg File *> * V. Cbalupeki Plant File 6 Imperial Chemical Industriest Ltd* n_ N 9 ** W. F. Speageaasa, Newark Serial No. KN-46-80 Copy So, 1 NEWARK PLANT PIGMENT COLOR RESEARCH REPORT Final Report Title* RT-357-D DEVELOPMENT AND STANDARDIZATION Of ECONOMY PROCESS, K-2301. Period Covered* November 1944 - July 1946* DATE ISSUED* 11/27/46 DUP050150071 The formerly prevailing mall batch siso sad consequent high staking* labor coot an Fna eoloro and* it necessary to investigate ways and means of lowering easts* In the ease of 87*357", increase in batch else together with light ingredient changes have effected savings in the order of twenty five cents per petted* The laboratory economy formula, 1112-230, one set up on a batch else approximately three tinea that of the regular pleat procedure, K*iOJO. Increases in the msk and dye eoaeeatratiea wad alight adjustment* in the dye and the molybdate-tungstate ratio wort olio introduced* After eatiefaetory 6emi*orke trials a nuafeer of pleat batohoe were node to eheok the laboratory fornola* quality performance wae fairly eatiefaetory. Bated on a deoieioa to set itp a "frae-flooring standard, a eaadidate nix of plant production, lot 8139, treated with 3$ Biphenyl guanidine, me evaluated. This notorial showed better ink consistency character!siloe than RT-392-D (the original "free-flerf* standard) but an objectionable "oil bleed" resulted, lowering the DFG content to 2$ by mixing in Bsore untreated toner gave satisfactory ink consistency and oil bleed* This mix, lot 8198, was sot up as a new ET-357-D standard on October 30, 1945* A comparison of the new versus the old RT-357-D standard follows* lot 8198 vs lot 33842* It, s dull * ve blue - va wk - s blue, dirty light faatnese* equal A formula based on the above was written and ceded RT-357-0 standard, K-2172* , Xn subsequent manufacture, difficulties with weakness and blueness of tint made it necessary to apply corrective measures (the strike temperature was decreased from 180F. to 170F; A new standard formula was written on this basic and ceded K-23OI. The plant aooepted supervieien of RT*35?*B manufacture on July 1, 1948* BlSCOBSiOK* The laboratory economy formula, 1112*230, differed frees the standard, K-1090, as follemel 1* The batch else wae increased to three times that of K-1090. 2* A out in the FTK& volume and a 54jS out in the dye volume was used te fit plant equipment* 3* The dye amount wae cut by 4* The tungstate-molybdate ratio waa out from 51*2 - 1. to 16.6 1* A cheek to laboratory 1112*230 in the 8mi-Worke finished up dark in maeetone but otherwise close to the laboratory produet and about % strong, blue, slightly dull in tint versus the RT-357-D standard, lot 33842* A 5$ cut in dye gave a product flightly weak versus the standard. DUP050150072 The first three plant batchae were close checks (ignoring macstone which is unimportant in HBI colors) end averaged $ stronger and very slightly yellower and duller than the RT-357-D standard. The addition of 3jJ Dp (ground in) in the next three hatches gave lighter assetone products which were equal in strength hut bluer and duller than the standard and weaker, bluer and duller than untreated control saaples. Material of this type is stronger and yellower than RT-329- (light, weak, blue type Rhodaadne tmar) andJRT-392-& (EPS treated RT-329-D). The objectionable linseed oil bleed with the 3^ WPS treatment made it neoessary to shade this material with untreated toner. Subsequently, a 2jf BP treatment was found to give desirable ink properties at the expense of only a slight deficiency in oil bleed, and lot 8198, a composite of five plant batches treated with 2j DP was set up ae the RT-35T- standard on this basis. Production on the K-2301 formula subsequent to standardisation gave fairly high "OK straight" performance. Of the eighteen batches made under straight*1** 6#ction 8tq>ervisl*tt, fifteen or 83JS were satisfactory to ship RT-329-D and RT-392-D have been obsoleted la favor of the new RT-357-D DSH - 46-50 PTMAi Phospho- tungsrko-molybdio acid complex. RT-357-Di A PTMi toner of ^hodasdne 60DB ground with 1$ DPQ* RT-329-0* A Pm toner of Rhedasdne 6GDH (lighter, weaker and bluer than RT-35T-D). RT-392-D* RT-329-D ground with % DPQ. ON Diphenyl guanidine. Rhodamine; 60DN; Rhodamlne $QDN plus a small amount of Auraratne. Rhedasdne * 5M>* Similar to Color laden 75. Auramine1 Color Index 655* DUP050150073