Document 9OkEwgkjXd75B4dwL7JeYd55

E. I. DU PONT DE NEMOURS & COMPANY PIGMENTS DEPARTMENT 256 VANDERPOOL STREET NEWARK, NEW JERSEY Copy No. f ,, 1 ,, " Period Covered: NEWARK PLANT PIGMENT COLOR RESEARCH REPORT Pinal Stemirt s g &b l j k 2Y1M I'CBEH ABD LAKE, RX-4&3-0 & HM-473-D seai-iaoass mt> pl a? s t o c k jf&TMSUFy !L9*V4 fcsp'fcsssb&P 1945 FILE: DATE: 222,25 H-A9-.4-5 /< A S -- I ,< 2 3 Copy tot #1 - Humerioal File 2 - Research Office (222.25) 3 - Library File (222,25) 4 - #10 Building File Serial Ho. KH-45-70 Copy Ho. / SBWARK PLAIT PIGMIHT COLOR RESEARCH REPORT Final Report title* SCARLET 2TLH DIE, TOME AHD LAKE - RT-438-D & RM-473-D SMI-WORKS AHD PLART STUDY Period Covered* January 1944 to September 1945 SUBMITTED BI: V. Chalupski APPROVED Bit V. Chalupski DATE SUBMITTED: 10-29-45 DATE ISaDEDs 11-19-45 DUP050150805 4wr --2-- lSfEQBge$18S During this period, dye manufacture was largely confined to the semi-works, because of poor quality of a few batches of dye made in the plant in 1943 and 1944* Pigment was manufactured in both the semi-works and plant; the toner process, while not entirely duplicable, for the most part reflected the quality of the dye used. A number of plant batches, made with good quality semi-works dye, gave super standard pigment. Much of the pigment made was converted to the lake, 8-473-i>, by dry miring. Because of production limitations, the Chambers Works informed us that they could no longer supply 2X1 intermediate or dye; because of this, early in 1945, it was decided to convert all existing dye, good and bad. to toner and to dispose of this material. When this has been accomplished it is planned to obsolete BT-488-0 and HB-473-3D, neither of which are profitable items* The following are discussed in this reports 47 batches of toner made in semi-works. If batches of toner made in plant. 22 batches of dye made in semi-works. 2 batches of dye made in plant. Twenty-four semi-works batches of toner, varying in size from 60 to 180 lbs., were made from dye purchased from Orchea. This dye was supplied as 2X1,, tut its quality was actually satisfactory as 2YLI3. All of the semi-works batches of toner were satisfactory in quality, the basic formula was the standard, .1436, but using the dye on an analyzed basis, which actually means an increase in amount of dye, and a 25$ decrease in amount of calcium chloride. Discussion of these formula changes may be found in toe previous research report -44-52* A number of batches were made with increases in the rosin (25 and 5G$) in order to obtain darker masatone. A number of other variable - slight changes in dye concentration, reduction in amount of rosin, and reduction in development temperature showed no positive results. Fourteen semi-works batches were made to test and consume a number of plant batches of dye* Host of these batches of pigment were Inferior to standard, reflecting dye quality. Attempts to improve quality by changes in toner formulation were not successful. Bine semi-works batches were made to test the quality of semi-works batches of dye. All of these were dark, strong and blue, as desired. Plant production of toner during this period may be summarized as follows* 2 batches made with Chambers Works dye - Satisfactory quality. 5 batches made with Semi-Works dye n* 4 batches made with mixture of Semi-Works and Plant dye - Fair quality. 8 batches made with sub-standard plant dye. - poor Quality DUP050150806 base toner formula used la the plant toner was the same as in the seal-works, as described above, So important formula changes wars triad. Slurrying of the dye in the Abb* Lenart mixer was found to be convenient in plant operation. tm batches of dye were made la the plant late in 1944* fheae were made la a vat not suited for the purpose and this may have been the reason for .poor quality, Because of this, dye manufacture was transferred to the semi-works. Most of the seal-works batches were made-' with m of pana-toluidfne-ortho-sulfomlc acid as an accessory agent to obtain dark, strong, blue material needed for shading sub standard teaser. As indicated in the previous discussion, an of this dye was quite satisfactory in quality. - It may be concluded that dye manufacture in the semi-works at 125 and 25 lb* batch sites is under fair control, but satisfactory control im- not been achieved in the plant, fhe toner formula used during period, while not giving good duplieabillty, seems to follow the quality of the dye fairly well, and if large production could be . maintained, standardization could be achieved if good dye were available. (fM&llr Of the lake fSJ-473- depends on the quality of the BT-48S- from which it is made. For details on dye manufacture see Development Section Data Book BSS-45-X3. For details on toner manufacture see DS8-45-14. DUP050150807