CEMENT AND CONCRETE PAINT TESTS 219 



Much chalking was shown, and a bleaching of color. It is 

 evident that this mixture would not serve to keep moisture out. 



Test No. 12 A. Primed with a 5% solution of soluble nitrated 

 cotton and paraffin dissolved in equal parts of amyl acetate 

 and benzine. Second coated with No. 119 blue. 



Not very good results were obtained, chalking and slight 

 scaling resulting. 



Test No. 12 B. Primed with a heavy varnish containing 

 Chinese wood oil and kauri gum. Second coated with No. 119 

 blue. 



Fair results obtained. 



Tests Nos. 13, 14, 15, and 16. Primed with a solution made 

 by dissolving 10 parts of sodium oxalate in 100 parts of water. 

 Second and third coated with linseed oil paints in red, brown, 

 blue, and green. 



Very good results shown at end of test. 



Test No. 20, Special. Primed and second coated with a green 

 paint containing zinc oxide and barytes, ground in an oil having 

 a low saponification value. Very slow drying was shown. 

 Excellent results. No failure of color. Extremely glossy, 

 waterproof surface presented. 



