Show C V F J 4 00 DO O YOU KNOW WHAT WHITE WHITE- LE LEAD D IS Its It Chief Use and a Method of Determining Determining Deter Deter- mining Good from Bad Explained White Lead is the standard paint material all over the world It Il Is made by corroding metallic lead Into a white powder through exposing it to the fumes of weak acetic acid and carbonic acid gas this powder is then ground and mixed with linseed oil making a thick paste In fn which form it Is packed and sold for tor painting purposes The Tho painter thins It down to the proper consistency for application by the addition addition ad ad- of more linseed oil The above refers of course to pure genuine White Lead only Adulterated and fake take White Lead of which there are many brands on the market Is generally some some sort of composition containing only a a. percentage of white lead sometimes no White Lead at atall all aU in fn such stuff barytes or ground rock chalk and similar cheap substances are aro used to make bulk and imitate the tho appearance of pure White Lead There Is however a positive test by which the purity or impurity of White Lead may be proved or exposed be be- fore foro painting with It The pipe blow-pipe flame tIame will reduce pure white lead to metallic lead Ita If It Ifa Ifa a supposed white lead be thus tested and it only partially reduces to lead leaving a residue it Is proof that something else was there besides white lead The National Lead Company guara guarantee guar guar- a antee tee all White Lead sold in packages bearing its Dutch Boy Doy Painter trademark trade trade- mark to prove absolutely pure under this pipe blow test and that you may make the test yourself in your own home they will send free upon request request re re- quest a pipe blow-pipe and everything else necess necessary ry to make the test together with a valuable booklet on paint Address Address Address Ad Ad- dress National Lead Company Woodbridge Woodbridge Wood Wood- bridge Building New York |