Aguilar: Linseed and Lumbang Oils. 

 Table VII. — Moisture experiment. 



[Numbers express percentage gain in weight.] 



243 



No. 



Oils used. 



Per 

 cent. 



Number of days 





6. 



12. 



32. 



60. 



1 

 2 



4 

 5 

 6 



7 





100 

 100 

 90 

 10 

 75 

 25 

 50 

 50 

 25 

 75 

 10 

 90 



0.05 



0.05 



I 0.07 



I 0.06 



1 0.06 



1 0.04 



I 0.04 



0.10 

 0.13 

 0.16 



0.15 



0.13 



0.13 



0.43 

 0.54 

 0.53 



0.49 



0.40 







0.80 

 1.04 

 1.00 



1.00 



0.90 



0.83 



0.69 

































The above results indicate that the moisture-excluding prop- 

 erties of mixtures 6 and 7 are higher than those of 4 and 5. 

 However, taking into consideration the behavior and the general 

 appearance of the paint films and the fact that mixtures 4 and 

 5 exclude moisture almost as well as linseed oil, I am inclined to 

 recommend them as paint vehicles. 



SUMMARY AND CONCLUSIONS 



The drying properties of lumbang bato and lumbang banucalag 

 oils are comparable with those of linseed oil. 



Lumbang bato oil is very similar to linseed oil in its properties 

 as a paint vehicle, and like linseed has certain disadvantages for 

 use in red lead paints. 



Lumbang banucalag oil cannot be used as a paint vehicle, espe- 

 cially with red lead; it dries into a paste. This is also true 

 with lumbang bato containing 75 and 90 per cent lumbang banu- 

 calag (mixtures 6 and 7, Table V) . 



Lumbang banucalag containing between 50 and 75 per cent 

 lumbang bato (mixtures 4 and 5, Table V) will make a good 

 vehicle for red lead. 



This work was carried on at the suggestion and under the 

 direction of Mr. George W. Heise. 



