Document zzvm2jDG367EKrDXy2zmrR1j6

VOLUME TWENTY 1955 NUMBER TWO COUETEST LENOX. INC. The delicate gray., yellow and brown flowers on this fine china are framed in a wide border of teal blue and platinum. Luster and brilliance are added to the design by a lead-base glaze. See story on page 4. FLEXIBLE SOURCE-GUIDE TUBE SOURCE (SHIELDED POSITION) AIJ- ILLUSTRATIONS COURTESY TECHNICAL OPERATIONS. INC At left, the setup lor nondestructive testing by panoramic gamma radiography. Above, a schematic drawing showing the lead sale in which is contained the radio active sourre when not in use at the end of the flexible source-guide tube. Lead Safe Used In Gamma Radiography *n ' ONCE a laboratory process, the increase production rates. And. since time-tested method of nonde the source is a point source, the obtenstructive testing by use of radioactivteion of sharply defined pictures is isotopes in the production of radio facilitated. Isotope radiography does graphs has now become a practical, not require electric power. As a result, low-cost industrial tool. This transi the testing equipment can be carried tion to easy gamma radiography, as to the work, whether it be a pipe line the process is commonly called, has in the wilderness or bridge construc been made possible bv the availability tion 500 ft. in the air. Because com of high-strength radioactive materials plex power and control systems are from the nation's nuclear reactor?. not required, gamma radiography Modern gamma radiography pos equipment and sources cost only a sesses three major advantages -- low fraction of comparable X-rav equip cost, flexibilitv. and portability. The ment. flexibilitv results from the small radia tion source, which can be inserted into confined locations not accessible to an X-rav tube. This also permits panoramic 1360" l exposures which Safety, of course, as with most modern industrial equipment, is an important consideration in gamma radiography. The safety problem is the same in principle as. but some what less acute than. X-ravs. One Ihreillunut sumnin nitiinertiphr equipment /. -h nun in the photograph. while the trtrutne shops how the leud container seri es both lu direr! the rites ana tu shield pertonne! trow dangerous rudtutwn exposure aspect of safety protection, the shield ing of the radioactive source -- which may be cobalt 60. cesium 137. iridium 192 or. in the future, a number of new isotopes now under investigation SOURCE (SHIELDED POSITION) --is achieved in the equipment shown here which is manufactured bv Tech nical Operations. Inc. of Arlington. Mass., by containing the source in a lead safe. For panoramic radiography, the radiographic source is mounted on LEAD FILLED SHIELD, COUNTED ON LIFTER 'SOURCE (EXPOSED POSITION) the end of a flexible control cable and 'tored in the lead container. This storage safe, containing about 500 lb. of lead, is designed so that the radia tion level at the surface of the con tainer does not exceed a maximum of about 50 mrhr. In operation, the source travels into exposure position through a flexible source-guide tube. This source positioning is under the __o__ Up control of the radiographer, using the remote control unit. Control cable and source tube lengths can be adjusted to meet the needs of the application. Primary radiation protection for the operator is gained by the distance between the operator and the source, and shielding, if required, inter posed between the operator and the exposed source. The techniques of panoramic radi ography mav be divided into the classifications of multiple .-penmen radiography and circumferential ra diography. In the former, specimens, backed bv X-ray film, are placed in a circle around a radiation source in the enter and all are then radio graphed simultaneously. In circumferential radiography, made possible bv the verv small size of a gamma radiation source, the source is placed inside anv closed \ e-sel >uch as a Mmage lank m transmission pipe line, and the X-ra\ lilm is placed on the outside. One exposure radiograph.- (lie enure < ir' umference. Directional radiographic equipment is used w here there are considerations o! space limitation or where large heavy products cannot be moved ea-iiv to the radiography room or for speed in plant locations where the heavy shielding of a directional pro jector shields the operators from the strongest available gamma radiog raphy sources. In this case the lead storage container of the projector also functions as the exposure .-(field. Approximately 1.100 ib. of lead are required for tile container. L I A26060 ON New York's East Side where. near the United Nations Build ings area, there has been a tremen stubs were needed for water closet connections. The building's roof and floor drains required 70 sheet lead qualities are mechanical character istics that make for efficient working. Especially under construction pres dous building boom in recent years flashings. Lead will be used in the sure, where the demand is for early to alleviate the city's office space building also to line the X-ray rooms completion and, thus, early renting, shortage, the Socony Mobil Oil Build of two tenants. materials that lend themselves to ing, the largest air-conditioned com At the Park Towers Apartments rapid mass production are needed. mercial office building ever under 429 bathrooms, together with kitchen The high output of preassembly work taken. is being hastened towards sinks, service sinks, and laundry tubs, that has assured a steady stream of spring 1956 completion. Meanwhile, will be fitted with lead waste connec fittings when they are needed for both out West, the penthouse-topped Park tions. In addition, the vent stacks, the Socony Mobil Oil Building and * Towers Apartments are rising 15 where they pierce the roof, will be Park Towers Apartments jobs tells stories into the Texas sky in the flashed with sheet lead. In detail, the the story of lead's aptness to mass Medical Center-Shamrock Hotel area fittings being installed are 4-in. lead production. of Houston. In common, both of these bends. 4-in. x 8-in. lead drum traps At the actual installation lead's modern developments make extensive and ll.A-in. lead waste pipe, except flexibility has special importance. use of lead plumbing fittings and lead for the service sinks where 2-in. lead First, structural discrepancies that flashings. pipe is being used. cause major headaches with some ma The Socony Mobil Oil Building will All the leadwork on both of these terials are simple compensated for bv lower 15 stories above the street and jobs is prefabricated in the shop on smooth bending lead. Or. ;pace-sa\ ils base covers a full square block the job site. The prime consideration, ing short cuts and unusual fermine- about two acres in area. Its gross area of course, in calling for the extensive are easilv made. Finally, (hi- llexi- will be 1.600.000 sq. ft., the net rent use of lead, is lead's proven high hilily provides protection for fixture able area 1.300.000 sq. ft. The sani- degree of performance in the sanitarv and piping itself against damage tarv requirements, obviously, are system. But after the service require caused by building settlement, vibra huge. Almost six hundred 4-in. lead ments are met the most sought-after tion and expansion and contraction. Lead bends., lead drum traps and other lead waste connec tions are shown where the\ were fabricated in the job-site shop at the Park Touer. Apartments. Some V.A. offi cials. in Houston for a con vention. look over the work. Lead stubs in the Soconv Mobil Oil Building extend through the floors and will be embedded in concrete. Thex provide the necessary give between the rigid pipe, rigid door and rigid fixture. LI A? fa06 l Lead Oxides Enhance Beautv 01 Dinnerware V THE peculiar advantages afcfdining from papaya leaves, or even paper plates, cannot bflidenied and some of our fellows would have it no other way. But most of us prefer to take our food from glistening dishes. Like darning swords, sensuous floral ar rangements and figurines sculpted in ice cream, attractive dinnerware adds to the pleasure of eating and without special expense or effort. The new bride, in her starter set, and the ac complished hostess, in her elegant formal settings, seek the sparkle and beauty that make the difference be tween feeding and dining. The gleam on dinnerware is its glaze, which also adds brilliance to the underlying de sign for a net effect that is most appetite-provoking. Universally, these dinnerware glazes contain lead oxide. COriiTKSV LENOX. INC. Lead oxides are art important constituent of the giazes that give sparkle and bril liance to dinnerware. Glazes perform an important func amic. The unique properties of a tion in rendering the body surface glaze are taken advantage of in many impervious, thus making the ware applications, beyond dinnerware. on more sanitary, but thev are surelv such products as tile, artware. struc more widely thought of in^terms of tural ceramics like pipe, dielectrics, the smooth, decorative sheen thev im sanitary ware, and terra cotta. part. This comes about from the na Lead is used in glazes in the form ture of the glaze which is simply a of litharge, red lead, w-hite lead and glass applied to and formed in place lead silicate. But. whatever the form, on a vitreous or semi-vitreous cer- the essential portion of these com pounds is the available lead monoxide ! PbO). The functions of the oxide, which is the function of lead in ail ccramics,are. first, to act as a flux which aids in the melting and solution of the batch materials, and. secondlv. to give desirable properties to the glaze after melting and in firing. The lead glazes have a low melting range. This lowers cost since, obviously, it is cheaper if high furnace tempera tures or long firing time do not have to be attained. The lead glazes also have a wide softening range which means that a margin of safety is pro vided during firing where tempera tures vary through the cross section of the kiln, so that the leau-ija;ed glazes are virtually foolproof in the working. To describe in loose terms what is in fact an exacting art. glazes are applied to vitreous ware as aqueous slurries, most commonly by spravine. and then fired. Lead glazes mav be grouped into raw lead glazes, con taining no frit or frits, and fritted lead glazes, which include at least one frit. A frit is a glass which has been prepared bv a melting operation. Usually it is quenched from the -- Porcelain Enameled Altiniiniin Maroon strips of porcelain enamel run twenty stones high and set ojj the alumi num skin o) the Second Aational Bunk Building in Houston. Tex. f*orrelain enamel on bathed i> fxndin: example:- of u*e of are pielured lu re. Porcelain enc.rncU'U aluminum sheets used as bulkhead components on the\ craft corner L'SS Forrestai are shown i I COL'KTXSY INGILA-Yi-RR'HJLIIDSO.S' MFC. CO. ing the furnace. LIA 26062 1 composition which is equivalent. Litharge and red lead are common I ly used in fritted glazes. White lead is ideal for raw lead glazes since it is insoluble in water, does not hvdrate or change in character, is the most easily suspended of the lead com pounds. and is more reactive than litharge or red lead in the melting operation. Lead silicates are actually lead in fritted form so that they mav take the place of a prepared frit in the fritted glazes. II A typical fritted lead glaze for semi-vitreous dinnerware can be stated, in the ceramist's way of molecular formulas, as: Fluxing or Intermedi- j Basic Oxides ' ales | Glass Former 0.43 CaO r COUBTESY SCHWEITZEE EQUIPMENT CO 0.26 PbO 0.12 K-.O 0.06 NajO 0.27 A1203 0.31 B*>03 , j 2.60 Si02 0.13 ZnO i In this circular giazer. the girl at left loads the ware onto the machine. The dishes are preheated in the first tunnel and sprayed, while rotating, with the lead-containing glaze in the second. The third tunnel dries the glaze. The girl at the right loads the ware on a stilliard, ready to be taken to the kiln. Or, on a basis of percentages of melted formula, perhaps more graphic to the general reader: molten state by pouring into water. into an insoluble form, to prevent The severe thermal shock accompany their solution in the aqueous slurry. ing the operation shatters the result Another object is to supply a quantity ing glass, giving a granular product of pre-formed glass to aid in the which is easily ground in the glaze melting of the glaze. A raw glaze re i preparation. One object of fritting is quires a higher temperature.-or longer to convert water-soluble materials bring time, than a fritted glaze of CaO PbO K>0 Na-0 ZnO AI0O3 b ,,u 3 SiO,. 7.7077 18.54 3.61 1.19 3.38 8.79 6.90 49.89 uijw Buildings, Subways, At Sea n iade feasible with leadiinf^ition even* day. Some >f 1 eay-to-work material F.ass working porcelain enamel ceiling panels being installed in this subway car a! the \eu York City Transit Authorit\. fOl'KTKSY A('F INOrSTHIKS. INC ts tht blue panels of corrugated porcelain the meled aluminum give beauty to this uni k dormitory building at Sew Jersey re Teachers College, Trenton, A\ J. II LEADED STEELS HAVE REDUCED MACHINING COSTS OF THESE PARTS I 'As m- ---- _. -- Switching to leaded steel for this spur gear meant the following improvements: AISI4140 Machine Speed, r.p.m. 90 Feed, inch/ rev. .007 Cvcle Time 6 ft., 15 in. Finish Fair AISI 4140 LEADED 128 .010 4 ft. Excellent Through use of a leaded steel automatic screw machine, production on this rotor was upped 25 percent. Saw blade life 1 used in sawing radial slots) increased from 18 to 60 pieces--a remarkable im provement representing a considerable savings in production costs. Use of leaded steel improved automatic screw machine production nearly 40 per cent on this bail stud. AISI AISI 8640 8640 LEADED Spindle Speed, r.p.m. 345 495 Machine Cycle, seconds 26.3 19.1 Production per machine hr. 108 150 Finish Fair Excellent ) l Leaded Steels Are Freer Machining THE manufacturer of a spray nozzle ciable effect on the mechanical prop part has increased his production erties of the steel. The leaded steels of the part from 16 to 24 pieces per hate, m fact, superior heat treating hour. Another manufacturer. v\ ho properties. 44 hat the lead does do is makes gears for agricultural equip to act as a lubricant between the ment. now gets 11 to 14'spiral gears cutting tool and chip and thus. b\ before he has to regrind his tool reducing friction, permit higher ma where formerly he had to regrind chining speeds. Chips are faster after every 6 to 8 pieces, in addition, breaking and there is no build-up on the finish is so much improved that the rutting tool. Cutting is cooler. the noise factor of the particular gear Resulting increases in tool life have in operation has been completely been as much as 100 percent. eliminated. And a screw machine shop The lead is added to the steel in a runs its spindle at 495 r.p.m. on a carefully controlled process whereby particular part where once speed a stream of high purity, finely-sized couid not exceed 345 r.p.m. lead shot is blown into molten steel Key to these and similar increases as it is teemed into an ingot. The in machinability--from 25 to 40 per temperature of the steel is adjusted cent--is the addition of small amounts so that segregation of lead in the of lead to the steel from which the product is minimized bv balancing parts are made. Leaded steel means the flow of lead shot. Each ingot is lower costs of parts through increased checked for lead content and even production. It also means morf lead distribution. Billets that show- smoothly finished surfaces, longer segregation under test are cut back tool life and more easily maintained and retested. Only the portion of the tolerances. Leaded steel is particularly billet which shows no segregation is suited to use in low cost parts requir considered satisfactory. Thus uniform ing extensive machining, like parts high quality is assured. for business machines, automobiles, Copperweld Steel Co.. Republic household appliances, hydraulic fit ^teel Corp. and Jones and Laughlin tings and textile machinery. Steel Corp. have entered production The lead added does not go into of leaded steels, under license from alloy. Neither does it have any appre inland Steel Co., which lias been mnk- -6-- mg the steels since 1939. 4 number of other domestic producers also hawlicenses as have foreign producer.-. .Most commonly, the leaded ,-teei is made available in bars that are hoi rolled and cold drawn. The < old draw ing die accurately shapes the bars and produces a smooth surface who li is of great importance to the opera tion of high-speed automate screw machines, lathes and -uch. since ir regular stock might jam iheir feed ing mechanisms. 44 hile screw machine .-hup- hawbeen the largest users of leaded -treis. the material is now finding glow mg use in forging shops. Then- is no dif ference in forging practice but the end product has the same improcements in machinability as hate leaded steel bars. Tool and diemakrrs are also now interested in the use of leaded steels to cut their costs And. for years. Allis Chalmers lias made steam condenser baffle plates from leaded steels because they are able to reduce drill and ream time for the thousands of holes the plates contain. One other important advantage that may be realized with leaded sn-ei is that, for the same machinabilii\. steel with improved physical rharac teristics may be used. LIA 2 & 0 6 A New York Citv Transit Svstem %f v Specifies Lead-Base Paints STEEL structures of the New York City Transit System are currently undergoing extensive rehabilitation, in pursuit of a program initiated by the Transit Authority when transpor tation facilities were taken over from the city by that group. The Transit Authority is undertaking many A straight-red lead paint. A'ew York Citv Transit Authority Formula M-l. is used in the rehabilitation painting of this elevated structure. changes aimed at improving facilities, equipment and service to the public. capacity of the transit system's main One change not deemed necessary, tenance staff, much of the work is however, is in the long-time use of done under contract. On the Myrtle lead-base paints for the protection of Ave. Line, painting is being done by steelwork in the system. A straight the Hudson Maintenance Corp. of red lead paint has served as the basic New York City. -hop coating and maintenance primer The M-l formula of the New York for manv years. Another red lead City Transit Authority, for shop coat primer is used as a first field coat for ing steel for new construction and for new steel and in three-coat main maintenance painting, is as follows: tenance systems. A white lead-base finish coat is standard for elevated structures. Lead pigments are speci PIGMENT: Percent by If't. Red Lead ` 95Gc Grade).......... 78.14 fied also in several other specialized paints used by the system. Representative of work currently in progress is the repainting of the Myrtle Ave. Line elevated structure VEHICLE: Raw Linseed Oil....................... Boiled Linseed Oil..................... Drier M-2* ................................. Turpentine ................................. 13.37 6.74 0.62 1.13 in the Ridgewood Section of Queens and Brooklvn. This structure has not 100.00 Wt. Cal. = 23 lb. 12 oz. been painted for twenty-five years, The paint shal 1 dry hard in nni vet the performance of the old red more than 24 hr. lead primer and the properties of that Drier M-2 same primer in the new application have enabled Authority engineers to call for surface preparation no more Drv Red Lead Manganese Diovide Linseed Oil. Ran Turpentine 20 lb. 15 lb. 50 gal. 50 gal. unusual than that of scraping and wire brushing, since the excellent wetting properties of Transit Author ity Specification Paint M-l. provided by the linseed oil vehicle, permit it to be used where some slight rusting remains. The prime coat is followed by Specification Paint M-ll, a greentinted white lead paint, except up to 6 ft. 6 in. above ground level where a black enamel (also containing red lead) is used. Because of the heavy volume of paint work underway, beyond the RED LEAD TECHNICAL LETTER NO. 10 NOW AVAILABLE Copies of the newest Red Lead Technical Letter, No. 10, "L.l.A. Formula 3-7, A Red Lead-Alkyd Vehicle Primer for Industrial and Marine Environments,'' may now be obtained free of charge from the offices of the Lead Industries Asso ciation. The formula contained in this Technical Letter has recently achieved wide popularity and has, after extensive in-service testing, been adopted as a standard primer by a major oil company. For the first field coat for all new structural steel and as a second coat in maintenance work when a threecoat system is used. Transit Author ity Formula SR is: PIGMENT: Percent by ITl . Red Lead (95% Grade).......... 14.7 Red Iron Oxide (85%Fe^Ov ). 20.6 Lampblack ....................................... 2.4 Magnesium Silicate ......................... 4.9 Siiica .................................................. 6.4 VEHICLE: Raw Linseed Oil........................... 45.9 Drier Z* ............................................ 5.1 100.0 VX't., Gal. = 12 lb. 10 oz. ' Drier Z is same as Drier M-2 given above. The grav-green finishing coat for elevated structures is designated Formula M-ll and is as follows: PIGMENT: Percent b\ U i. Basic Carbonate While Lead... 24.0 Basic Sulphate White Lead... 12.0 Zinc Oxide .................................... 18.0 Tinting Colors ............................... 1.2 Silica ................................................. 2.4 Magnesium Silicate ......................... 2.4 VEHICLE: Raw Linseed Oil........................... 36.8 Drier M-2* ....................................... 3.2 100.0 Wt./Gal. -- 15 lb. 6 oz. The paint shall dry hard in not more than 18 hr. * As given in first formula above. LIA2 6065 Sulfuric Acid Concentrator Has Brick and Lead Lining Corrosion-resistant lead lining in varying thicknesses is seen at upper right oj this acid concentrator. In turn, the lead is protected from high temperature by the bricks. When National Petro-Chemicals Corp. required Ionslife acid protection, at low maintenance cost, of certain installations at its synthetic ethanol plant in Tuscola. Illbrick and lead lined construction was selected. One of these installations, shown here, is a sulfuric acid concen trator 16 ft. in diameter and 24 ft. high. Some 19 tons of chemical lead, varying in thickness from 16-lb. lead on the sides to 32-lb. lead on the bottom, was used in lining the vessel. This type of lining is one means of using lead where high temperature is a problem. (Another method is the lead cladding of steel in which there is no insulating air gap between lead and steel so that the heat transfer prop erties of the steel are exploited.) It is used commonlv in the 450 deg. F. range and has been used at higher tem peratures. The brick lining provides a temperature gradient to insulate the lead from high temperatures within the vessel. At the same time, corrosives seeping through the brick are stopped by the lead and prevented from attacking the steel supporting structure. -r THEX'tii! _C_.:_U_. JIM of Technical The following irtfrlei and reprint* contain information, drawings and ptti&tatioai on the uae of lead product* helpful to architect*, engineer* and other* interested. Thee are available, ffM of charge, except where otherwise indicated, upon request to the LEAD INDUSTRIES ASSOCIATION, 420 LEXINGTON AVENUE. NET YORK IT. N. Y. ma t e r ia l s o f c h e mic a l c o n s t r ic t io n ANNUAL REVIEW? -- LEAD AND LEAD ALLOYS Up-to-date reports on new developments in the ue of lead and lesd allovs tn chemical construction including: research propress, engineering appliesttona. and ternnologica: sdvancementr. ^ uh bibiiograpbr. 1955. 1954 and 1953 review* (editions are not cumulative) available. Reprinted from '`Industrial and engineering Chemt-inOctober. 1055. October. 1C.>4 and October. l'*53. LEAD REFTRENCE SHEET {Part. I & 2) A short outline of the tvpes. grades. and chemical and physical properties of lead in chemical con struction. with s summary of the corrosion characiemtici of lead in use with a large number of common chemicals and solutions used in various Industrie*. Reprinted from "Chemical Engineering Progress." January aod February. 1055 LEAD AND LEAD ALLOYS The corroaion resistance of lead aod its alloys ti materials of construction in the chemicsi process industries it shown for more than 1B8 industrial chemical* Reprinted from "Chemirsi Engineering." February lro3. MATERIALS OF CONSTRUCTION -- LEAD A brief survey of the use# of lesd io chemical construction reprinted from the materials review published in "Chemical Enf ineering. '* Nov. 1954. LEAD LININGS-- FASTER, CHEAPER. BETTER o dA report a new method of fastening strapped lead linings by the use of a cartridge powered stud driver. Reprinted from "Chemical Engineer- 'itf," February. 1954. RADIATION PROTECTION The place of leao in shielding against raiiiatioo in \-rav and atomic energy applications. Principles ot U ad hirlding comi ftienon. Reprinted from "Lead m Mo.ivrn 1 ndustrv. " LEAD VORK FOR MODERN PLUMBING $1.50 Postpaid, $1.00 per copy in quanti ties of JO or more Profusely illustrated with over 140 photographs sod drawings. this textbook present* cietriv to the piumbinf student the oecessarv toola. procedures and the methods required for lead work. <IGCE5TED SPECIFICATIONS FOR CHEMICAL LABORATORY DRAINAGE SYSTEM A complete guide to the selection and installation of drainage ivatems in chemicsi laboratories. In eludes laboratory waste and 'em piping, trap*, sinks, acid trays, troughs, safe pans, neutralizing basin* and other topics. LEAD IN MODERN PLUMBING-- THY, VHERE, HOW IT IS USED A 24 page booklet containing descriptive informa tion aa well as four pages of detailed drawing* ior plumbing installation* in various type house*. LEAD VELDING An informative as well aa practical guide to lead welding. Reprinted from the "Weiding Handbook. Third Edition" publiahed by the American Welding Society. LEAD FLASHINGS IN MODERN CONSTRIC TION Leao Sashing* a* u*ed in an ultramodern house in Randolph. Vi. Reprtntea from "National Roofer." October. 1954. THE STORY OF LEAD -- MATERIALS THE RAILROADS BUY {Pari* 1 and 2) Lead from mine to finished product with apeciai reference to ita ue by the railroad*. Reprinted from "Railway Purchase* aod Store*." December. 1954 and February, 1955." LEAD IN MODERN INDUSTRY $ 1.50 Postpaid A fully tiiuttrated. 230 page, doth buund book describing all phase* of the production and uae of lead, lead alloys and lead compounds. RED LEAD TECHNICAL LETTERS A senes of technical letters containing red paint formulation*. {Available aeparateiy.i lead Ttrhnical Letter No. 3*--Red Uad Primers for Atmospheric Exposure Technical Letter No. 5 -- Red Lead-Vinyl and CounaroDS Type Paints Technical Letter No. 6 -- Red f^ead Paint Formulations Technical Letter No. 7 -- Paint Systems for Hydraulic Structures Technical Letter No. 8---- Primer* (or Rail road Structures and Rolling Slock Technical Letter No. O Red Lead Paint* for Galvanised Steel. Ru*ted. ^Feathered or Treated New Technical Letter No. 10-- L.l.A. Formula 3-7, .4 Red Lead- A Ik vd Vehicle Primer for Industrial and Marine Environment* FEDERAL SPECIFICATION TT-P86* Paint: Red-Lead-Base. Ready.Mised Covers four types of red-lead-base paints including two fa*i-dtv>ng formulations. Many intended appli cations listed. RED LEAD PAINTS FOR GALVANIZED SURFACES Presentation of five new red lead pamt formulation* for uae on gaivsnriea surfaces, with and without top coats. Reonnird (mm "Paint an<i Varnish Production." Mav. 1955. METAL PROTECTIVE RED LEAD PAINTS The reraaciliiy of red lead to protective pnmtn to meet a wide range of surface conditions, drving schedules ana economic demands i* described. Re printed from "Paint and Varnish Production." Januarv. 1951 I UPON REQUEST, THE LEAD INDUSTRIES ASSOCIATION WILE BE GLAD TO MAIL LEAD" REGULARLY. FREE OF CHARGE. TO THOSE INTERESTED, AND TILL COOPERATE WITHOUT OBLIGATION I* THE SOLUTION OF YOUR LEAD PROBLEMS rlUNTEB trt V. s. 4. 20 A*C MtO'UW COMPANY NEW 1 OR k c it y LI A 26066