72 STERILIZING 
fresh milk is for the most part readily washed 
away by cold water. On no account should hot 
water be used at this stage, as it makes milk stick 
fast. 
BRUSHING WITH ALKALI POWDER 
The acid of sour milk is neutralized by the 
alkali in washing powder. The butter fat is 
changed into soap by alkali powder. For this 
reason, a washing powder containing soda removes 
dried curds and grease. Washing powder should 
be used in luke-warm water, and applied with a 
brush to cans, pails, tanks, and vats. 
