Document k6eMqEEn3X898kL4pZBzgNVgJ

A'TRIP THRU THE TRITE TRIAD PLANT IN CHICAGO . , 1927 issue Chameleon, pages 8-9 U.. a flight of stairs, over a jack knife bridge, thru a tin door and you stop in the twi light of the stack house of the VThito Lead plant. You arc on a balcony which holds you suspended over a seemingly endless void. A.s your eyes become accustomed to the dir. light you discern mountains of tank bark extending down thru the center of a great barnlike wooden structure with hugh stalls flanking cither side. A tang;' smell cuts into the con sciousness of your nostrils and you wonder whether you like it or not. A dampness pervades and a ~an is cutting fanciful curves thru the air with a large hose. You are in an differ ent a world from Doc Van Stone's Lacquer Plant at the other end of the lot as a little Dutch village would he in contrast to '2nd and Broadway, New Ycrl:. Call it primitive, basic, fundamental or whatever you wish, the making of Old Dutch Process Thiite Lead goes back to the shadowy beginnings of paint mailing with a process which persists until today, a process requiring the pur.st of corroders, lead, handfilling end loading of stacks and Nature*s own sweet time of changing metallic lead buckles into white lead carbonate 90 to ICO days. The lead buclJ.cs now prepare to say fard?c?.l to tlicir metallic form. At the bottom of those pots is dilute acetic acid in a small well. The acid docs not touch the buckle until vaporised by the heat of the fermenting ten bark. There arc IE layers of pots in a stack. Each tier is cov red with a double rhcatliing of boards and is tucked away under a blanket of tan bark a foot and half thick. A wooden vent permits the generated steam to escape as it works its way up thru the stack. The heat at the v-outh of the vent v/culd bum the hand Lead is received at the THiite Lead plant in the form of pigs or bars which weight 100 lbs. apiece. They are fed into the furnace at the left and emerge in liquid form which pours in to moulds on the traveling belt, goes up over the ladder, by which time the molten metal is cooled and falls in a prrtael-like disc in the heap at the right. It is these discs, called buckles, which arc shown filling thr corroding pots below. Then the corroded lead buckles are taken from the stack they are crushed and mined with water. Then the long process of vsaslsing, screening and purifying begins. The lead must first pass thru a sill: screen which carries 200 tlircads to the inch. It would seem that so finr a scree" as tlels would remove everything that was removable - and it docs. There are no particles of tan bark, uncorroded lead or foreign substance which gbt by the screen which is on a vibrating table and fairly gives one the shivers to watch it, and yet from the screen the lead must float thru 20 vats of water before it emerges fully purified and capable of passing the rigid tests of the inspector's desk. This makes certain twenty times over, that there is no possibility of any acid remaining, any contamination of tan bark, end it is quits certain that the lead which has floated in the water thru 20 tubs is going to be just about the last word in fineness. The finishing steps of drying the lead in cteam-hcatcd pane to drive off the water and the subsequent regrinding with refined lin seed oil can be re-dily enough undo-stood. There arc refinements thru ever;- stop of manu- .. facture, however, which cannot he explained in so limited a discussion, but which makes S-T7 0DP Thitc Lead a favorite with the painter. It does not get hard in the package, it is easy to break up and mix into paint, is very whitd and easy working under the brush. 'Thitc Lead is filled by weight. The bucket rests upon a scale and is filled with one throw of the lever. A dash of lead with a putty knife adds the necessary touch to make the scale go down. The man at the left puts in the printed direction sheet for making white Lead Point -with 0DP which is enclosed in a waxed envelope. Kis machine forces and clamps . the calf-scaling cover. The large amount of tank bark used and the extreme weight of the lead makes the use of this powerful traveling hoist car indispensable. It is tracked on overhead rails to reach every point in the large building. >J ft:: 0007-SWP-000007022 /Lead and Litharge are cade by causing the lead to combine v.ith o::ygcn under great Ax, Tlie pig lead is roasted in these furnaces for three days by which tine it has /hanged to a bright yellow powder, wliich is litharge. At this time the furnace re quires close attention, for the litharge coon begins to change to red lead. If the roasting is continued up to nine days, the change to red lead becomes complete. Sherwin-Williams Guarantee "This package is warranted to contain nothing but strictly pure White Lead, ground in strictly pure linseed oil, and we will pay one ounce of gold for every pound of adul teration that it may be found to contain". Hather a comprehensive guarantee, as the reader will agree, and yet we have cv-ry confi dence in the absolute pruity and supreme quality of our ODP White Lead we don't hesitate for a moment in going the limit to assure the user of that quality. RED LEAD AKD LITHARGE An entire took could be written about these two most interesting products.' They ere used in making such divergent products as glassware and -torage hattcriec, rubber pro ducts and varnish, used in oil refining and in linoleum, etc. All these departments come under the supervision of Ur S TJ Stevens our Gcn'l Supt. of Pigment Products Manufacture. Mr. Stevens came with us in 1210. He is a graduate of the Royal School of Mines, London, as Mcttallurigical Engineer. His two hob^iec are golf end a reported" fondness for working 2-1 hours a dcy. The portrait is not entirely characteristic because his pipe is missing. 0007-SWP-000007023 .'ri. - >' 41