Document rpj15oDR1aedGB9Bd25mdjr4e

1' $ * ?"'. -%tfc*.f > 5^*S^5"r iV ssrihaiiA. LI A1599** LEAD INDUSTRIES ASSOCIATION, INC. ** MAOISON AVtNUI new vomc. n . v, lootr fs^*' PCBCEAJH PWCLKP AlttCHOK COCS CT AM* Dean 8. Hubball Tie* President, Architectural Products Division H. H. PhbertscB Cccaanv As producers of lssd cenpounds, Z believe you trill find loir f n irature porcelain enamels cn alvaimB Interesting, both ss a useful construction Beterlsl and as a rather premising narket for lead; incidental If, one vhlch removes load forever fren the scrap aarkst. i .1 Zt cones closer than any other arterial to providing the best of tvo worlds. ! Being completely inorganic, its colors and film integrity are not affected by ultraviolet light and weathering, yet it enjoys the toughness usually associated with organic coatings. Zt can be bent, cut or punctured with very little dsaege. These lew temperature porcelain enamels are essentially lead glass and are one of the aost long-lasting aaterials. Archeologists, sifting for clues to past civilisations or hobbyists digging through old city dunps for antique bottles, attest to the durability of glass. Porcelain sneunel is glass which has been made opaque with titanioa dioxide and given color by dispersing through it colored oxides of other aetals. Assw ing that these additions are well chosen and proportioned, they also contribute ) toughness. His is because the tiny cracks that grow readily through glass are stopped when they reach these inclusions. They act the laminations in safety glass. : t The ability to stand the abuse you Just witnessed results also fraa the porcelain's reaarkabls adhesion to the netal and fren the relatively thin coating that is necessary. Because glass in inert, weathering does not progress beyond its surfaoe. Therefore, thick coatings contribute nothing and only detract fren flexibility. Tou ean bend a glass fiber or weave it into a fabric -- but not if It is tbs diaaeter of a tberncaeter stem. In this day of color, the appearance of a large building wall of bare alu minum, or far that natter of aost aetals, is drab and often variegated In shade. Zf atmospheric corrosion pits its surface, it becomes still less attractive. If the corrosion products are colored, they stain its surface. Bven if they are net colored, as in ths case of alv=*nua, the pits collect soils and beccew unsightly. Porcelain enamel supplies enduring color together with corrosion resistance. *Presented at the 37th Annual Meeting of the Deed Industries Association, Inc. Drake Hotel, Chicago, 111., April 26-P9, 1065 jpfjjsi-U ii!i ,uwiyiii. 'ii iw .ii J i'tnwim ,. , --- - -^^ , 5prr$,STOj.w ^- -;? " r-' LIA15995 jftik Dean 8. Hubball -2- Porcelain &>***l*d Altmimm Ccoes of A|t In *4111100 to color, architects are currently seeking mcterlals that allow freedom of form, This 1* * natural for almlm* because It cn be extruded la * variety of ebapea, east aa baa-relief and, In sheet form, be easily enboaaed. Thus, porcelain enaael on simian offer* such as an architectural notarial. Many technical difficulties have stood in the way of successful enaaiellng of alumioas. For exanple, the relatively saall difference between the Maturing tesperetur* of the enamel and the softening point of the alumima Introduce* shape problems. Also, simian's vulnerability to alkallns attack has made it difficult to bring about it* successful marriage to porcelain slip* which art Quits alkaline before they are fused to the metal. Another troublesome problem has been color uniformity. Zt Is Quite a differ ent matter to achieve color uniformity in an entire building wall of many thousand square feet than It la to antmel appliances or other objects of small araa that are sean Individually. i As with many other materials, its early history has not been ccapletely rosy. Some alumion allays have proven unreliable for enameling. Early enthusiasms attracted enamelera who did not have adequate equipment or know-how. Seme poor Jobe buve been produced end these have of course become well known among archi tect*. We have run down the details of each of these bad Jobs and have found that the faults have resulted frm definite and avoidable mistakes. These "dogs" there fore have no implication upon the integrity of the material, except that it should be purchased from reliable sources. It became clear that several things were necessery -- First; unquestioned proof of its enduring nature end -- Second; meens by which purchaser* oan be certain of definite quality. To accomplish this, responsible alumlmn enomelers plus the simian companies, frit producers, and other supplier* organized the Aluminum Council of the Porcelain Enamel Institute. Its first accompli*tment* have been a weathering program con ducted Jointly with the Bureau of Standards and a performnce specification. Specimens produced by the member ensmelers, embracing a range of colors and glass, have been exposed at 5 sites around the country; &are Beach, H. C., Washington, D. C., Los Angeles, Montreal, Hew fork. They will be inspected and reported in tareau publications. Incidentally, those specimens, In contrast to those of other materials, were sawed from large pieces to deliberately expose edges *nd reveal any damage. It is, I believe, an indication of the sincerity of purpose of the Alixslnvas Council that these two activities were given first call on our budget and efforts. There has been a small amount of money left over and this residual will be devotad to proBotiooal efforts as grandiose as $4,000 will carry us! The exhibits you see around this platform and the color slides of buildings have been solicited from the entire Industry. The bulk of those available are of Vltralume, the H. H. Robertson Company'e pcrcelain-on-alumima. It may be of interest as evidence of the potential market in competent and responsible hands. Starting modestly about 8 years ago, the volume has increased steadily. V* bav* 4 presently produced acmewhst over 800 buildings ranging from power plants through 1 airline terminals and school* to shopping centers and manufacturing plants. Our Wfi8|pipp^i l|!|iii. i luiaiimkqigii i, i H; ... ---- -r^r ~---- - "r"'r;Sf?:;' -T. _ ,,. ., jskwwfr'' , - - '- - - . ....... - ... ***** LIA15996 Sean 8. Bubbell -3- torcelaln baaeled Co m* at Age casplete record! of tbeee Job* provide opportunity far frequent checks. lest maser, most of the Jobe were reriilted by people fro* tie various Sales Offices with checklists of queetlone Inquiring Into performance and bow well eetlefled were the owners. lbs surrey wee extreewly gratifying! Ferhaps the color pictures of ectuel buildings or building elements will show whet has been done with porcelain on elmiib m end suggest other possibilities. As they ere projected. I'll identify each and tell who produced It. A IM mmm mm mm mm