Document YDN3qqLLpybNXLDBdObeOz7yE

FILE NAME Corning OC DATE 1962 Mar 9 DOC OC118 DOCUMENT DESCRIPTION Internal Memo RE Reduction in Dustiness of Kaylo Rock NDERCLASE NDERCLASE NDERCLASE NDERCLASE NDERCLASE NDERCLASE NDERCLASE NDERCLASE NDERCLASE : COMPANY \ CORRESPONDENCE \ Into Into ( H. V. Smith - Toledo Date March 9 1962 From 2 From Subject W. C. Taylor - Toledo = REDUCTION IN DUSTINESS OF KAYLO BLOCK a R. C. Amos B... erlin -D Anthony - Toledo . J. H. Boynton - New York ; R. E. Grie - Barlin A. S. Kevlia - New York D. W. Ladd J. A. Pershing O. W. Pfeifer - New York - Toledo > Toledo J. B. Rhoads Berlin W. H. Sedgeman - Toledo Ro F. Shannon Granville V. K. Sidwell A. C. Siefart = Toledo - Granville J. F. Vyverberg - New York a C \ You were shown during the Quality Audit at Berlin on January 23 a | sample of block which had had its dustiness completely eliminated by treat- ment of its surface with Ludox a suspension of colloidal silica Further trials at the Research Laboratory indicated that much ment can be accomplished at a materials cost of one cent per square Of course less complete elimination of dustiness could be achieved correspondingly lower figures treatfoot at Nothing has been done as yet toward equipping and modifyitnhge flatware finishing line to provide this surface treatment One reason for this delay is the recent absence of John Pershing because of his hospitalization Then almost coincident with Pershing's return DuPont indicated a most likely acceptance of Kaylo if it were to contain % of sodium silicate by weight as a corrosion inhibitor see letteorf Lotz to Boynton March 2 1962 Thus far DuPont has not defined whether the finished ware is to be impregnated with the sodium silicate or if this amount of sodium silicate would be equally acceptable as an integral ingredient in the raw batch The Research Laboratory is currently exploring both approaches If the decision is made to treat the surface of the ware with sodium | silicate by dip or spray a much less dusty surface would result from this treatment in itself Sodium silicate tends to pick up water under conditions of high humidity and become tacky whereas dried Ludox does not As for the effect of sodium silicate in the batch on the degree of dustiness this remains to be determined In any case you will be advised at an early date of developments as they pertain to be subject wet WCT mra V. C. Taylor 87