126 Condensed Milk and Milk Powder 



Ash. — The mineral constituents also are present in nearly the 

 same proportion to the other solids, as in fresh milk. They are 

 largely rendered insoluble by the sterilizing process. The lime con- 

 stituents frequently are found in the bottom of the cans in the form 

 of hard, whitish, insoluble granules. 



Since the ash in normal fresh milk is practically constant, aver- 

 aging about .70 per cent., the per cent, of ash in the evaporated 

 milk is frequently used as a factor in determining the degree of con- 

 centration. The results may, however, be very misleading, since, 

 when the ash is precipitated in the form of granules, it is practically 

 impossible to mix it back into the milk in order to obtain a repre- 

 sentative sample for analysis. 



The Specific Gravity ranges from 1.05 to 1.08, according to 

 the degree of concentration and the specific gravity of the original 

 milk. It averages about 1.065. 



Plain condensed bulk milk is of very varying composition, de- 

 pending largely on the degree of concentration and the per cent, of 

 fat present. It is usually made from partly or wholly skimmed 

 milk and is oondensed at the ratio of 3 to 4 parts of fresh milk 

 to 1 part of condensed milk. The same fact applies to the com- 

 position of concentrated milk. 



