256 



STANDARDIZING CONDENSED MILK 



Enough 25%' cream must be added to the raw milk so that each 

 21.7 pounds of standardized milk contains .66 pounds of added 

 cream and 21 .04 pounds of the original milk. Hence 21 .7 : .66 = 

 7000 : X ; X 213. Ibs. of cream. 



Total batch, 7000 pounds. 

 25% cream, 213 pounds. 

 3.3% milk, 6787 pounds. 



EXAMPLE: 2. 



Amount of fluid milk in batch, 7,000 pounds. 



Fat in fluid milk, 4.5 per cent. 



Solids not fat in fluid milk, 8.5 per cent. 



Fat wanted in evaporated milk, 7.8 per cent. 



Solids not fat wanted in evaporated milk, 17.7 per cent. 



How much fat should fluid milk contain? 

 milk must be added? 



How much skim 



Answer: 17.7 : 8.5 = 7.8 = X ; X = 3.75%. The fluid 

 milk must contain 3.75% : fat. 



How much skim milk must be added to lower the per cent fat 

 in the fluid milk to 3.75%? 



4.5 



3.75 



.0 



3.75 



.75 



4.50 



Enough skim milk must be added to the fluid milk so that each 

 4.5 pounds of standardized milk contains .75 pounds of added skim 

 milk and 3 . 75 pounds of original milk. Hence 4.50 : .75 = 7000 

 : X J X 1167 pounds of skim milk. 



Total batch, 7000 pounds. 

 Skim milk, 1167 pounds. 



4.5% milk, 5833 pounds. 



