Document MM3vJVb44g5Rw8nOwRa6Gm0vk

E. I. DU PONT DE NEMOURS & COMPANY KREBS PIGMENTS DEPARTMENT 256 VANDERPOOL STREET NEWARK. NEW JERSEY \t0 Serial No. KN-46-?4 Copy No. 1 NEWARK PLANT PIGMENT COLOR RESEARCH REPORT PIGMENT SCARLETt SF-28 and RL-211-D, PLANT MANUFACTURE. SICK LIST STUDY. \ Period Covered: April 1946 to July 1946. FILE: DATE: H/5/46 NJOCTS N39959 Copy tot #1 - Huaorieal Filo 2 - Research Offloo (222.41) 3 * Library Filo (222.41) 4 - #10 Building Filo 5 - V. Chalupgki Plant Filoo 6 Imperial Ghonloal Xaduotrioo* Ltd. |. N ** |a II N M 9 I, F. Bpeofeeaut* Newark Serial No. KS-46-74 Copy Ho* 1 NEWARK PLANT PIGMENT COLOR RESEARCH REPORT Final Report Title* PIGUEST SCAR1ET* BF-20 and RL-211-D. PUNT MANUFACTURE* SICK LIST STUDY. Period Cerorodi April 1946 to July 1946. SUBMITTED BYi 0.J.0 APPROVED BY i J. 0. Herriooa BATE SUBMITTEDl 9/13/46 DATE ISSUED 11/5/46 N39959.01 DUP050150128 aMssa#e1 Dim to consistent production of dark, dull maestones la RL-211-D, work request No* 44 for aesietaaee to the plant was issued* Tide report covers the work done toward eorreeting the dark, dull masatones* Darky dull auitoaw have been a roeurring difficulty einoe anthranilio sold of teohnieal grade was substituted for the previously used re-eublimed produot. The teohaieal anthranilio aoid hae boon of fluotuating quality. A formula for SF-28, K-1684, was onoe written, incorporating filtration of the diaxo as a remedy, but it wae never adopted ae standard proeedure* gWfefflf IIP WWMIfffflM By elarifioation ef the diaxo la the SF-28 dye manufacture a narked iqprovtwwit in 8W11-D quality was attained* Howevery the quality deficiency was not oompletely remedied, and a new standard, representative of presently attainable quality* was set up* The status ef the problem at preeent ie aa fallow*! (a) A new formula for 8F-28, Pigment Bearlet Dya, K-2345* was writtent providing for olarifioation of the diaxo* Use of dye made on this formula gives Rl*~2ll-D of greatly improved quality* In plant praetiee the intention is to omit elarifioation when the appoaraaoe of the diaxo indicates that it is warranted* (b) A new standard, S.D. 48468 (let 48055) hae been sat up* It is a six of batches made from dye manufactured on the now formula* The rating of this standard against the previous standard SD #47996 (lot 32046) is as follows1 Maasfoag fi&aBKtt SIB*- Itta&jJfoajSBtig s dull we etrang vs intense equal (0) A goal yield determination on RL-211-D confirms the old figure to within 0*3jt. (d) Control wae resumed by the plant on Jims 20, 1946* Beginning la April, all SF-28 diases were clarified* Improvement was immediate, and the plant took ever control as aeon as eeasleteaey was demonstrated* Details ef the batches ef SF-28 and the RD-211-D node from them appear in DSN-46-48* mm SF-28, K-2345* formula and netee* Development Section Notebook 46f48* DUP050150129  2- flOflMW S**-28 Pigment Scarlet dye - a di-sodium salt of a coupling of diaso anthraailie aeid with R wilt* RL-211-D* An alumina ferrate lake ef Pigment Scarlet dye using Barium chloride as a preoipitaat* DUP050150130