- 7 - 



be used. 



Tinted paints, including most of the colored exterior paints, are essentially 

 white paints into which a minor proportion of color pigment has been mixed. Some 

 exceptions are the dull red, broxtfn and yellow paints having iron oxide pigments; 

 the bright reds with organic lake pigments; the bright yellows and greens with 

 chrome yellov/ or chrome green pigments; and black paints with lamp black pigments. 



The vehicle for most exterior paints is mainly linseed oil. It may be 

 either raw or "boiled". Driers are added to raw linseed oil to increase the rate 

 of drying and hardening, Boiled linseed oil is thicker and dries more rapidly 

 because soluable driers have been incorporated in the oil through a heating 

 process. 



Although there is no generally accepted standard defining the quality of 

 paints, the formulas sho\*n below are ones knovm to give good performance when 

 correctly used and will serve as a guide for the selection of exterior paints. 

 The formulas are for white paint (or paint that can be tinted) and should not be 

 used for the selection of paints having primary pigments other than lead, zinc, 

 and titanium. 



EXTERIOR WHITE, READY-MIXED, WHITE LEAD AND OIL PAINT 



Federal Specification TT-P-lOA 



Percent by Weight 

 Minimum Maximum 



Percent total paint 



Total pigments 71 73 



Percent pigment 



Basic carbonate white lead 99 



Matter soluble in water 0.8 



Percent total paint 



Total vehicle - 27 29 



Percent vehicle 



Linseed oil 70 75 



Thinner and drier 25 30 



EXTERIOR WHITE, READY-MIXED, TITANIUM - LEAD - ZINC PAINT 



Federal Specification. TT-P-102 



Percent by Weight 

 Minimum Maximum 



Percent total paint 



Total pigments 62 



Percent pigments 



White lead 31 



Zinc oxide 25 27 



Titanium dioxide, anatase type 15 17 



All other pigments 28 



Matter soluble in water 0,8 



Percent total paint 



Total vehicle 38 



Percent vehicle 



Raw or refined linseed oil 60 



Bodied linseed oil 16 20 



Thinner and drier 20 



