Document BR1qXjd2n3MrLJYkBrezoJekJ

COM M ERCIAL PRODUCTS HIGHWAY SIGNS ARCHITECTURAL PRODUCTS ADVERTISING IDEN TIFICATION SIGNS CALIFORNIA M ETAL ENAM ELING COMPANY 6 9 0 4 EAST SLA U SO N A V EN U E LO S A N G EL ES 2 2, C A L I F O R N I A R A Y M O N D 3 - 6 3 5 1 January 7, 1963 Dr. Robert A. Kehoe Director of Kettering Laboratory The University of Cincinnati College of Medicine Eden Avenue Cincinnati Vy} Ohio Dear D r . Kehoe: We are writing to you in regard to a letter received from the Lead Industries Association, Inc., a copy of which is enclosed. We a.re also enclosing copies of two new reports dated January 3 , 1963 of tests performed by Truesdail Laboratories in accord ance with the State of California test method for determining lead solubility of ceramic glazes for the pottery industry. The tests performed by Truesdail were on the alternate method proposed by the State of California and further tests on the boiling acetic acid are being performed presently and should be available within the next few days. It is our understanding that the State of California allow up to four parts per million for these ceramic glazes. Since our porcelain aluminum materials seem to react favorably in this light, i.e., less than four parts per million, it was our feel ing that the porcelain enamels could be used on the interior of. cookware even though they are fired at 1,000 degrees Fahren heit instead of the conventional firing temperature of the pot tery industry. Our lead'content is approximately 30^ of the smelted formulation which is, in many cases, less than used by the pottery industry in their cookware. As suggested by Mr. Fowler, possibly the Kettering Laboratory has a more definitive test for determining the maximum allow able lead solubility in a ceramic glaze that could be suggested to us for testing by the Truesdail Laboratories or another rec ognized independent laboratory. We would appreciate whatever help you could offer along this line, as well as your evalua tion of the enclosed reports. VP/db y/tmly yours, / ___---- H. V. Penton President N9691 u jc r m '! HifHtS H. INCf.. < !. - . W A l t * 5 E S C M v V A l ! -.Mr 5? S!:..f ,r _* r, v*.iAr. ,;f< . \ i i r t"i' . ! , V. i: i I ' v- '.V :l > K. t I - ..... * *j - I (: I D 9 L E . ' >v . <j riv`. v ... ( ; SI f,S<r IAS'f * -.1.: 2 9 2 M A D ISO N A V EN U E X JO V Y O R K 17, X . V . Ja n u a r y >, 1963 ,H r j Mr, H. V. Pennon, President California Metal Enameling Company 69OI hast Slauson Avenue* Los Angeles 22, California Re: Your letter of Decembe: Dear Mr. Penton: We are cl the opinion nor, as we have oeen ir. the past, that errraluminum cookware snould not be coated on the interior surface with lead-bearing enamels. Our recent series of tests run at coKettering Laboratory lead us to believe that one of the most important feelore in the reduction of lead release from glazes a: ; enamels is trie firing tenporature. Thus far tbs Kettering test: indicate that loose glares fired ool.ow iboCh'R, increase the ris of lead leachiifg. We would recommend that you contact Dr. Robert A. Keboe, Director f the Kettering Laboratory, The University of Cincinnati, College of Medicine, Eden Avenue, Cincinnati. 19, Ohio, for his advice ana hr it in suggesting and, possibly, performing suitable tests. . The main reason we make the suggestion tnat your company contact Jr. K ehoe.is that there is no suitable standard for read release ir. cookware or dinnerware at the present time in this country and v... have been working with the Kettering Laboratory in an investigation designed to inquire into the development of a suitable standara. none of the standards that we have seen in foreign countries use the term inology or test methods which the Truesdail, laboratories used in one evaluation which they performed for your company. So that it is difficult to relate the results they obtained to the known foreign standards. If you wish, we will obtain copies of these foreign standards and make them available to you. In summary then, we do not at the present time and in the light of our current knowledge recommend the production and use of enamel aluminum cookware which contains interior enamel surfaces. Very truly yours, t DGF:md ok A h ea d with Lea d Don G. Fowler * N9691.01 CLIENT . SAMPLE California Metal Enameling Company 6904 East Slauson Avenue Los Angeles 22, California Attn: Mr. Hugh Pen ton ' Ceramic Coated Dish ' P.0. No. 21232 I N V EST I G A T I O N . . ./ Test according to tentative method of test for solubility of lead from glaze surfaces. 410 N. FI GU ERO A ST REET LO S A N G E L E S 65 CAPITOL 5 - 4 1 4 8 D A T E January 3, 1963 RECEIVED December 26, 1962 L A B O R A T O R Y NO. 59815 / RESULTS LEAD Parts per m i l l i o n -- ----- 2.5 Milligrams per square inch of exposed surface - 0.020 Respectfully submitted, TRUESDAIL LABORATORIES, INC. -"hilip J. Vice Pre, \ N9691.02 5 HE OOOS354 4a 'mi :to the ample, or ample, inveitigated and w pot neceuarily indicarir of the quality or condition of apparently A*a-.saiBt! protection ^ to.client*,, th*-public and thee* Laboratories, this report submitted and accepted -/ tre}-? f o r thef.nlea.* Atwxaclliut ^raivb .e u*#\ ao/ .f nitth^e c^l!-e--n-t to who--m- 2iat i aaddrewab Jd < amnd Upon.aLt.h. e c. onJdfiti~on tha_At. it.t- t{...n..o. .t .t.o_ 1b. e. .u_ .se. a.1, in.._ whole or in part, in any 7tr TRUESDAH. tK \ REPORT;^ ' *' ' V, LABORATORIES, INC. *``tf'ixZg' - 'y */ * ~ JC-A?* ^Ta!V,S'**i K * * ***+&-.^*>--^ C H E M I ST S - B A C T ERI O L O G I ST S - EN G I N EERS 4 101 N. F i C U E R D A S T R E E T LOS A N GELE 65 * CA pit c l 5-4143 CLIENT SAMPLE California Metal .Enameling Company 6904 East Slauson Avenue Los Angeles 22, California . Attn; Mr. Hugh Penton ' Ceramic Coated Dish D A T E January 3, 1963 REC.EIVFD December 26, 1962 L A B O R A T O R Y NO. 59316 P.0." fcoV 59S6 I NVESTI GATI ON Determination of the-amount of lead, cadmium, and antimony in 5% acetic acid solution which'had been in contact with the ceramic coated dish for twenty-four hours at room temperature. RESU LTS Lead Cadmium Antimony Parts per million 1.9 None detected Less than 0.05 Milligrams per square, inch of exposed surfaces. 0.')! Less than. 0.0005 ..;y '- ..vi **1 i *f *. i ~ *js*i( *.''*o(3;%*cvS'vy* r,,'C p - ', 'Os?' " IV- .- ' f * -* v- V -* '-,apCLfc - v,-*?11\,-!>,, -' ' ~ *' j . ' J - _ * * '?* > * % * " / ' Respectfully submitted, TRUEPDA1L- LAD ORATOR LBS, INC/ / I // ''A / < "U '/ ; UiJl^LcA Philip J. .Uarley, Ph.D.^-'/ Vice Pres^dir i/ -/^ 000S35 1S9691-03 Th i s report applies only to the ample, or ample, investigated and is not necessarily indicative o f the quality or condition of apparent ly 'i d en t i cal or sim ilar pr od u ct s.'A s a mutual protection to clients, the public an d ,these Laboratories, this report is submitt ed,and accepted, .-for.the exclusive use-of t h ecl i en t to whom it is addressed and w p on t h e condition that it is not t o he used, i n whole or i n .p ar t , in any