Document 2R8MkMxgzr0X8QLd5EVjy7Obr

"J. or" The above illustration is from an un-relquched photograph of the surface of a panel coaled with a straight white lead paint and exposed to the atmosphere of a large city continuously for two years. Note how badly the paint has "chalked." The little pile of dust in the photograph was secured by rubbing the surface lightly with a soft cloth. The dust collected was from an area measuring 1 2 in. by 8 in. Note how the white lead film has turned gray in reaction with the coal smoke and sulphurous gases in the air. DISCOLORS READILY r* *- r v <r In the photograph at left a striking comparison will be ob served in a test of straight white lead and oil paint and SWP White. This unretouched photo graph was taken after a three year exposure. The lead and oil paint is on the right. 00Q7-SWP-041157 v r <r * r r r r r r r r c 5WHITE LEAD EXCLUSIVELY! HERE'S WHY- > $ h =r* l *T* $ I d** SWP The above is a close-up photograph of the SWP paint film after a three-year exposure. Observe the generally unimpaired appearance of the' film and absence from the characteristic checking of single pigment white lead paint. If white lead as a single pigment made the best house paint, the United States Government and all important railroads would not be specifying paints for exterior painting that have a MULTIPLE PIGMENT CONTENT. -U. Here Is another interesting comparison of a test made with SWP and straight lead and oil paint. This tinretouched photograph was taken after 2 years of exposure. S-WP appears on the two left-hand doors. 0007-SWP-041158