CASEIN 231 



type matrices, and will keep for any length of time, by 

 reason of its lightness and durability. It is thus evident 

 that the field of application open to casein is practically 

 illimitable.'' 1 



Other Uses for Casein. Photographic plates may be 

 made of casein and have some advantages over glass and 

 celluloid, being lighter in weight and less fragile than glass, 

 non-inflammable, and less likely to curl during developing 

 than celluloid. 



Casein even forms an important part in a brand of shoe 

 polish. It is used to treat pulp board roofing and makes 

 a fireproof covering that is not softened by the heat of the 

 sun. Wooden casks used for beer, wine, etc., may be coated 

 inside with a solution of casein and formaldehyde. This 

 makes an impervious seal. Artists and scene painters 

 require that their canvas be primed before it is painted. 

 For this purpose casein gives better results than chalk, 

 driers, etc., because it does not crack with age. The soap- 

 making industry claims its share of casein for use in toilet 

 soaps, perhaps because the casein aids in holding and re- 

 enforcing the perfumes. 



Buttermilk Poultry Food. A poultry food, concentrated 

 and high in protein, is made as follows: 



Buttermilk is heated in tanks to about 160 F., and al- 

 lowed to stand until the curd has settled. The whey is 

 then drawn off, and the sediment, a mass of curd with a 

 thick, creamy consistency, is run into barrels and sold as 

 poultry food. This product, though heated to a high 

 temperature, is not sterile, but, because of its thick con- 

 sistency, has good keeping qualities. Like sweetened con- 

 densed milk, it contains insufficient moisture for bacterial 

 growth. 



1 Robt. Scherer Casein, Its Preparation and Utilization. 



