Document qdGn9kYooyx0d8E63yzBp4YEG

*^*' 5*1 Gross Reference; 00.ir Mr. *ohn Marshall, m M014 Cil Mr* J. B. Bullitt. Lab* *NDEXED ,f * 3T. W. IXtff, Labs * Mr* 0. R* E Merkl, Lab* foZS'SQ ** FXiatflex 153 & 154 Lines Ti<>2 Conservation MEMORANDUM REPORT HOWI Philadelphia Laboratory August 21, 1946 mm 18 MARSHALL LftBORATBRV LIBRARY BSE OF RUTILE TlQa IN FLIETFLEX flJlfllS W (iinH*ill*ii(flnilllliUHir|iWWfTr--T `'I nMMrlua<ni|iM-.lj < " II .1 0"iaJlii-n*a(l>allril4|i,l :: v': V In order to conserve TiOg pigments, 30m girSLtyvwTM conducted on several Flintflex tints in order to find out if the W-16. could be replaced with W-28 Rutile Ti02 which is considerably stronger in tinetorial strength than W-16. The formulas selected for the tests were 153-511 Gray, 153-526 Green, 153-503 Light Gray and 153-5209 Medium Gray* The W-16 pigment was replaced with W-2B on an equal hiding basis. The following tabl will indicate the percentage of T1Q2 pigment saved by the substitution and the pounds of Ti02 saved per gallons of enamels: Code 153-5X1 153-526 153-503 153-5209 29$ 50$ km, . I#; f ., .^XSibs./gal. " , . .. 1.1 1 .06 lbs./gal* Th gloss, hiding, drying properties and initial film properties'of all the enamels were equal and on flowouts the. flooding oharaoteristios of th H~2& containing formulas were as follows: 153-511 - very lightly worse, 153-5209 - slightly worse, 153-526 - equal, and 153-503 - less. The flooding differences are small and are not serious enough.,to condemn this, change of pigmentation. The data on these experiments may be found in notebook #3047. Investigation WI-632 has been issued for this work and this investi gation has not as yet been answered...so that,more work may bf don,on this subject if it is desired. J:PL /lEIliHihpiA: l abo r a To h s t U/ M W. tW. H.UOGK/^^f N 30698