226 DAIRY TECHNOLOGY 



ready for use. An antiseptic should be added to prevent 

 fermentation. 



There arc many patented formulas for the manufac- 

 ture of casein glue. Borax, ammonia, lime, and various 

 alkaline salts are used in this connection singly or in com- 

 bination. 



Closely allied to the casein glues and of similar composi- 

 tion are several kinds of casein putties and stopping. 

 These materials are employed in wood working and cabinet 

 making. 



Casein Paints. — It has long been recognized that the 

 addition of milk to whitewash increases its adhesiveness 

 and durability. This result is principally due to a combina- 

 tion of the casein and lime. This compound, formed by the 

 combination of casein with certain other substances, forms 

 the basis of all the numerous casein paints of to-day. 



Scherer gives the following formula for a paint for out- 

 side work: 



loo parts by weight of casein, soluble in alkali, 

 loo " " " " caustic lime from marble. 

 800 " •' " " levigated chalk. 

 ' to 2J " " " " ultramarine (for white only). 

 I part " " " borax. 



On the market to-day are casein paints of all kinds 

 and colors, liquid and powder, some of which are: Casein 

 Enamel Paint, Kalsomine Wash, Quick-Drying Casein 

 Paint, Cold Water Paint, Boiled Oil Substitute, Water- 

 proof Paint for Playing Cards, Casein Cement Paint, etc. 

 Similar paints are prepared by the use of the whole milk 

 instead of merely the casein constituent. 



Milk-cement Paint. — A most effective and durable 

 paint can be made from milk and cement by mixing one 

 gallon of milk and about four pounds of Portland cement, 



