14 



PAINT TECHNOLOGY AND TESTS 



very soft film, and the use of hard driers, such as the metallic 

 tungates, is therefore advisable with menhaden oil. When mixed 

 with linseed oil paints the odor of menhaden oil is sometimes 

 noticeable, but it disappears entirely after such paints are ap- 

 plied. Its use with linseed oil in technical paints exposed to 

 the salty air of the Coast has given good results, often pre- 

 venting " checking " and " chalking." 



The following constants were determined on samples of men- 

 haden oil received in the writer's laboratory: 



Whale Oil. While ordinary whale oil is too dark and odorous 

 to ever come into extensive use as a paint oil, it is probable that 

 the refined oil will be utilized in the manufacture of certain techni- 

 cal paints. Whale oil is boiled from chopped whale blubber, the 

 first trying being the lightest in color, while the later tryings, as 

 well as the product made from bones, are of darker color and of 

 very bad odor. Oil of mirbane is often used to mask this odor. 

 The oil contains large quantities of stearin and palmitin, as well 

 as wax-like constituents which are apt to be thrown out of solution 

 in very cold weather, or when the oil is mixed with other oils. 

 The refined oil, when ground with lead and zinc pigments and 

 mixed with equal parts of linseed oil and treated tung oil, dries 

 to an elastic and soft film. Experiments are being made to 

 utilize whale oil in the linoleum industry. 



The analyses of samples of whale oil tested by the writer are 

 as follows: 



Sunflower Oil. Sunflower oil is produced largely in Russia 

 and Hungary, finding favor in those countries as an edible oil. 



