Document MoRwe0vvaDYZ9oGGOQYDjX75j

v" ; l. > Ha m m hd L e a d P r o d u c t s ,!n c . R e d Le a d Litharge Silica t e s - 40 EAST. MAI N STREET CARNEGIE:, PENN. PH O N E WALNUT 2 -3 1 3 1 'Noyeaker 9, 1962 Mr* Don G* Fowler ' .V : ; y b v ' " ' : ; ' Lead Industries Association, Inc* 292 Kadison Avenue : i. ' \ ` New York 17, New York 'Y : . ^ '' . .:"x -/-v. - ' Dear Boas - . ' Y ; .Y -. ... . ' The date of Wednesday, December 5 for the next meeting on the lead release study is quite agreeable with m' I will arrange to be present* I would feel, too, that we would be well advised to Invite Ernie Rommel and George SpencerStrong or a repres@nta.ti0 fron each company to attend our meeting since they are interested in the natter end have Bade a significant contribution In 3sy letter to you of October 22 ccraaenting on the recent report fron Kettering Laboratory, I made mention on page 2 of three items of information which would be desirable to more or less round up and complete the story* This information is now available as followst 1* Barry Thlcaeck, of Hamer langhlin China Company, reported on the PbC content of three of the glazes which they submitted as follows: Fiesta Red (As) 5 6 . PbG Fiesta Green (Ba) 23.3^ PbO Clear glaze (Bb) 242^ PbC Karzy said that he has made some moderate changes in the glaze formu lation reducing alkali and B0Q3 * He believes that these changes account for the lower lead release figures in this recent report* 2* Hr* E* H* Hornae!, of the 0* Hcmrnel Company, reported on the FbO con tent of the Ceramastone glazes* The PbO content of the granite, yellow, cocoa, pink and black Ceramstone is approximately 310>* The PbO content of the tangerine and blue Cer&aatone is a nominal 32.C$. Tim reccaaffiended firing temperature of these glazes is 1840F. Hr* Hommcl said that the actual firing temperature of the Ceramastone ware is unknown* He pointed out that the gloet kiln in which the ware was fired is very old, the temperature controls are entirely inadequate* It is known that there was a wide variation in temperature through the cross section of the kiln* He said that to the best of hie knowledge there was no record attempted of firing temperature on the ware involved, .' Hr. Don a. Fowler load Industries Association, Inc# ...... 2 Kavessber 9* 1962 3* A letter of November 6 fro the Pemco Corporation reports on two Ceramastone cups obtained by them locally They made a load release test using the hydrogen sulfide precipitation method on one cup as received* They then refired-a cup at 1660F and de termined the lead release* At the earns time t h ^ determined lead release on a cup glased with one of their standard, tempositions for a satin finish* These figures are shown as followsj Laurel cup (as received) Laurel cup (refired to 1&60F) less Sample C-67449 less 60-65 ppm Pb than 5 ppm Fb than 5 ppm Fb A photocopy of this .letter is attached. It would be helpful to have similar information on a number of these cups as received and refired with solubility determined by the dithizone procedure because of its greater sensitivity and accuracy* As I mentioned on the telephone I am sending copies of this letter to Dr. Kehoe and to Byron Herein as a representative of the USPA so that the above information will be available to them before our meeting. Very sincerely yours, KAHKOlffi LEAD PRODUCTS, INC. JSKipi cc: Dr* Robert A* Kehoe Byron W* Merwin Nordyke President, Sales Icjl^ HE- 0006011 r*%"1 r. Z-?' - v S<-v %'-'- ' '*"" f *e v i o '' ' " ' ' ' * ^ f ,^ # **w '* , T H EB t y t s i o N ' O F GLIODEN /COMPANY November 6, I962 Mr. J. S. Nordyke ii^O Sulgrave Road Pittsburgh 11, Pennsylvania Dear Jack: The data you requested in your phone call of November 5 is shown following: laurel cup fas received) Laurel cup (refired to l860F) Sample C-67^9** 60-65 ppm Pb < 5 ppm Pb* < 5 ppm Pb* *A fine gray-white precipitate developed over several minutes time after H2S solution was added; this was thought to be ZnS. **Pemco composition tested in conjunction. According to John Marquis. the data shown above is all that we have, since only two samples were received. Best personal regards. Hope to see you soon. Sincerely, a ' > Edward E. Mueller Assistant Director of Research EEM :BAS OOC6 0 1 2 Hi 7456.01 -