Document 2q4g3vgea9aRzzwb0zOLZBYvR

4* i' ' E. I, DU POUT DE NEMOURS & COMPANY Pigments Department i QC: ; J4. Hunt/E, SonicE - Wilmington ;. S, Struve/A. A, Brizzolara - Nwk. Wl--U-*- Marshall - " E. P. Klenke - " B*--Anderson - Edge Moor J. J. Stecker * " 11 iC. D. Atkinson - Newport D. Mudron - '' , E. H. Kolb - ,f A. D. Volk - " ,J, E. Waller - " H. H. Gyorgy - " J. W. Minnich - " Pile - " Newportj Delaware May 4, 1966 "KFFLkIR" - NEWPORT XOA-6 - CLOSING REPORT Title: Hydrolysis of NF-128-D Purpose: This batch of improved gold is being prepared for initial sales evaluation of the NF-128-D grade. Results: The hydrolysis was carried out according to the conditions prescribed on the batch card. Three variations in the original instructions were made under the direction of E. F. Klenke: a) The hydro was heated to boil in less than 2 hour's . b) Water was not added to maintain level during boil. c) No Sb2C>3 was added. End-pointing of the hydrolysis was done by the color of the coated mica, a medium reddish tint constituting the end point. Laboratory calcination of a sample of the batch yielded a satisfactory product. Specification of the TiOa:miea ratio and the corresponding boil time should permit routine plant operation. The time temperature record for the hydrolysis is attached. /tm5 attach*