112 



CONDITIONS AFFECTING RICHNESS OF CREAM 



Skim milk discharged 

 per minute 



Effect of Temperature of Milk on Richness of Cream. The 

 temperature of the milk influences the richness of the cream 

 yielded by the separator to a marked degree. 



Table 17. -Showing Effect of Temperature of Milk on Richness 



of Cream. 1 



Normal Temperature 90 to 95 F. 



Low Temperature 50 to 60 F. 



The experimental results summarized in the above table 

 show that cold milk yields richer cream than warm milk. The 

 cream from the cold milk averaged 31.7 per cent fat, while the 

 cream from milk separated at 90 to 95 degrees F. averaged 21.2 

 per cent fat. The difference would probably have been con- 

 siderably greater, had it not been for the excessive loss of fat in 

 the skim milk from the cold milk, which reduced the amount 

 of fat supplying the cream discharge. 



The cream from the cold milk is thicker and more viscous 

 than that from the warm milk. This greater viscosity renders 



HHunziker, Why Cream Tests Vary, Purdue Bulletin 150, 1911. 



