A COMPARISON OF LINSEED OIL AND LUMBANG OILS AS 

 PAINT VEHICLES " 



By R. H. Aguilar 



(From the Laboratory of General, Inorganic, and Physical Chemistry, 

 Bureau of Science, Manila) 



ONE PLATE AND ONE TEXT FIGURE 



Because of its general adaptability to different kinds of paints, 

 linseed oil has not been supplanted 2 on a commercial scale by 

 any other oil. The lumbang oils are possible substitutes for 

 linseed oil, and they have been much studied, 3 but little has been 

 reported concerning their behavior with different pigments or the 

 quality of the resulting paints. It is, therefore, hoped that the 

 following preliminary series of comparative tests on the proper- 

 ties of linseed, lumbang bato, and lumbang banucalag oils may 

 be of interest. 



Lumbang bato (Aleurites moluccana), a large tree belonging 

 to the family Euphorbiacea?, is common and widely distributed in 

 the Philippines, occurring in most islands and provinces. It 

 occurs both as a native and as a semicultivated tree and is locally 

 abundant. The species is one of very wide geographic distribu- 

 tion, extending from India through Malaya to Polynesia. It is 

 commonly known as the candlenut tree, but has numerous local 

 names in the various countries where it occurs. In Hawaii it 

 is known as kukui. 



According to Richmond and Rosario 4 the seed yields from 60 

 to 65 per cent oil by extraction with carbon bisulphide, ether, or 

 chloroform and 55 per cent by hydraulic expression at 500 kilo- 

 grams per square centimeter. In the present work the yield 

 of oil was 44 per cent (calculated on the weight of the kernels) 

 by hydraulic expression at 310 kilograms per square centimeter. 



1 Received for publication July, 1917. 



2 Gardner, H. A., Paint Technology and Tests. McGraw-Hill Book Co., 

 New York (1911), 2. 



3 Wilcox, E. V., and Thomson, A. R., Bull. Hawaii Agr. Exp. Sta. (1913), 

 39. Brill, H. C., and Agcaoili, F., This Journal, Sec. A (1915), 10, 105-119. 



4 Richmond, C. F., and Rosario, M. V., ibid., Sec. A (1907), 2, 441. 



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