Document KqVqo5YGJyKrDDwBv6ZjKwBK

V i y f f J T c/DRUGS, OILS AND PAINTS , ( lv !er white pigments and w hat properties do y possess which w arrant their use ? Ire a t hiding power has already been men- ned as an outstanding distinguishing char- eristic. Chemical stability and inertness is other. Titanium oxide will not react with ong hydrochloric and nitric acids. Hydro- oric acid or hot concentrated sulphuric acid required for its solution and a fusion is essary in order to obtain a reaction with alies. Partly depending upon the above two proper- in which these pigments differ from other ite pigments and partly depending upon perties which they possess in common with ers, eight distinct qualities of titanium pig- nts should be mentioned. Distinctive Qualities 'irst: Titanium pigments are very high in ;city. The barium base pigment will hide n 40 to 120 per cent, more surface th an the _>r w hite pigments; the calcium base pig- lt will hide from 50 to 150 per cent, m ore; th e pure oxide from 350 to 600 per cent, e. Titanium pigments possess concentrated ing power to a far greater extent than was amed of a few years ago and this property ne has opened up many possibilities in nulation. econd: There is no danger of bodying, ring or after yellowing on account of any nical reaction into which titanium pig- its m ay enter. On the contrary, so f a r as r yellowing is concerned, titanium pig- 'ts in some cases appear actually to retard afte r yellowing of oleo-resinous vehicles. 3 effect has not been definitely explained it seems to be more than a simple masking he yellow color due to the high opacity of p igm ents. lird: Titanium pigments will w ithstand eme conditions of exposure without altera- or discoloration. At high baking tem pera- s th ere is no discoloration, decomposition reaction with vehicles. They are not ted by light. ourth: Titanium pigments may be the ct means of preventing checking, cracking scaling in outside paint films. They are 1 with entire satisfaction as the only pig- t for making inside paints with varnish 3 of vehicles, but for exterior paints made common vehicles they are alm ost always together with one or both of the older pig- ts, zinc oxide and white lead. It is well vn th a t linseed oil paints in which titanium nents are used alone chalk too rapidly on sure to outside conditions. The very inert acter of these pigments makes it advis- in order to obtain a sufficiently elastic to incorporate in outside linseed oil paints tain am ount of pigm ent which is slightly five w ith the vehicle. In this respect this quality might be considered a disadvan- but as a m atter of fact it is in reality a t advantage. The degree of chalking can ontrolled by using titanium pigm ents in >rtions to produce a film having a degree ardness such th at the chalking is only gradual and the painted surface even a long period of years rem ains in excel- condition for repainting. There is no er of ever having to apply a torch to an ior surface which has been protected by a ium paint, provided, of course, th a t enough ium w as used in the paint, th: Titanium pigments have a high light 'tive value. Magnesium carbonate and lesium oxide, universally accepted as the lard of highest brightness, have a light tive value of 98 per cent. T itanium pig- s have a light reflective value of about r cent. ;th: Titanium pigments are practically a al white. venth: On account of their excellent color, to tal brightness and great opacity, ium pigm ents produce clear color tones, from muddiness, when used as a tinting . . . . - v -------; - ^ m bhe the 'finest n f the w hite L kSc?-: Give your customers real satisfaction with high-lead-content paints . .. Roar. U .S .P m t.O ff. EAGLE-PICHER 134 N orth La Salle Street * C H IC A G O W hite Lead, C arbonate Sublim ed W hite Lead Super Sublim ed W h ite Lead R ed Lead Sublimed Blue Lead Litharge Sublim ed Litharge Orange M ineral Zinc O xide Lithopone adapted for certain purposes than any of the others. The calcium base composite, Titanox C, having the lowest specific g rav ity and con sequently the highest bulking value, is especially well adapted for those goods in which a large volume of pigm ent per gallon of paint is desirable; the pure oxide, having extrem ely high opacity, is especially well adapted for those goods in which a small volume of pigment is desirable; th e barium base composite, Titanox B, m eets all ordinary requirem ents. In the following tabulation specific gravities, bulking values, hiding power and oil absorp tion are shown. For the sake of comparison values for basic carbonate white lead, chosen as representative of the older white pigments, are included. The bulking values represent the pounds of pigment per solid gallon. The hiding power values represent the approxim ate num ber of square feet of black surface com pletely hidden by one pound of pigment. Bar- Cal- White ium cium . Lead Base Base TiC>2 ' ` ` .. ' ig V alues ments and the history of their development, but not a g reat deal is to be found in our general literature concerning titanium . T itanium was discovered in 1791. W illiam Gregor upon examination of a black sand found near his home in Cornwall, E ngland, > concluded th at it was made up of the oxides:^ of iron and of a new element. The black sand ij is now known as ilmenite and the new elem ent as titan iu m . In 1795 M. H. K laproth, in A us tria, extracted a new element from a m ineral now known as rutile and about two years later- identified it w ith G regor's new elem ent. K lap ro th gave it the nam e "titan ic e a rth ," from whence we now have the name titanium . Some of the most noted inorganic chem ists devoted tim e to research on titanium , and m any of its compounds were prepared and their re actions learned during the last century, but no | im p o rtan t commercial applications w ere made 'A until about the beginning of the p resen t cen-ji tury. This lack of commercial stim ulus^ together with the fact that its concentrated:^ ore deposits, existing as they do in rather remote corners of the earth, had not been doumd^nos doubt'largely>.accounts fo r -its-* ' * h av in g attracted more attonHr-i a v