198 



SOAPS AND PROTEINS 



dilute the spoiled mixture and let it stand l (thereby diluting the 

 salt and allowing the soap to increase its hydration); more soap 

 may then be added and more time given. This may by itself 

 accomplish the desired end, but, if it does not, the whole batch 

 should be mixed, with proper stirring and sufficient time, into 

 the much smaller batch of soap/water stock thought necessary 

 for the production of the correct ultimate system. 



TABLE LVII 



SODIUM OLEATE Sodium Carbonate 



1 There is no element in technologic practice involving lyophilic colloids 

 which is less considered and less properly employed than this of time. The 

 chemist is so obsessed by the theories and so ruled by his experience with the 

 dilute solutions that he believes that his colloid mixtures ought to act similarly. 

 Whenever a lyophilic colloid is concerned it should be remembered that its 

 solvation or its desolvation takes all the time which may be included in a proc- 

 ess of diffusion, of solution and of chemical union and these things are rarely 

 instantaneous. Even when mixtures are correctly made from a quantitative 

 standpoint, the result may be worthless if proper time is not given for the 

 physico-chemical changes necessary to yield the proper ultimate system. 



