SAPONIFIED CEESOL SOLUTIONS. 



Soy-bean- 



Rosin 



Remarks. 



oil soap. 



soap. 





Per cent. 



Per cent. 





10 



90 



Shows faint clouding after 1J hours. 



20 



80 



Shows'faint clouding after 2| hours. 



25 



75 



Clear after 5 hours; faint cloud at 24 

 hours. 



30 



70 



Clear at 24 hours (sometimes faintly 

 cloudy). 



40 



60 



Faint cloud after 48 hours. 



50 



50 



Clear at 7 days. 



60 



40 



Clear after 7 davs. 



70 



30 



Do. 



80 



20 



Do. 



90 



10 



Do. 



OBSERVATIONS ON SPEED OF DILUTION 



All dilute clear and more quickly than the saponified cresol solu- 

 tion prepared from soy-bean oil only; those containing the larger 

 proportion of soy-bean oil to rosin more nearly approach straight 

 soy-bean oil in speed of dilution. None separate or solidify when 

 held at 32° F. All are more viscous than the straight soy-bean oil 

 preparation. Amounts of sodium hydroxid up to 20 per cent in excess 

 of that theoretically required in similar preparations retard the speed 

 of dilution and only to a slight extent the clouding. 



Three per cent dilutions were made, using tap water instead of 

 distilled water. The saponified cresol solution made with straight 

 soy-bean-oil soap clouded immediately. The soy-bean oil 10 per 

 cent, rosin 90 per cent, clouded after about one-half hour. The 

 soy-bean oil 30 per cent, rosin 70 per cent, was clear at 5 hours but 

 cloudy at 24 hours. Amounts of sodium hydroxid up to 20 per cent 

 in excess of that theoretically required in preparations like these 

 had little effect on their tendency to cloud. 



A saponified cresol solution made by mixing a saponified cresol 

 solution containing linseed-oil soap and the solution containing the 

 rosin soap so as to contain a soap equivalent to linseed oil 25 per cent, 

 rosin 75 per cent, behaves very much like that made with soy-bean 

 oil 25 per cent, rosin 75 per cent. 



A saponified cresol solution made Dy mixing a solution containing 

 fish-oil (menhaden) soap and the solution containing the rosin soap 

 so as to contain a soap equivalent to linseed oil 25 per cent, rosin 75 

 per cent, behaves very much like that made with soy-bean oil 25 

 per cent, rosin 75 per cent. 



A saponified cresol solution containing 7 per cent by weight of soy- 

 bean oil as soap and 25 per cent by weight of rosin (containing 90 

 per cent rosin acid) as soap will closely approximate a saponified 

 cresol solution made by using a mixture of 25 per cent soy-bean-oil 

 soap and 75 per cent rosin soap. The figures are convenient to use 

 and a preparation made with this proportion of oil to rosin should be 

 just as easy to manufacture as the saponified cresol solutions atpres- 



