MILLING 159 



parts removed, called middlings, are sent through 

 the purifier. The part which does not go through 

 the screen goes on to the next break. Since the 

 first break rollers are set far apart, the grain is 

 here merely flattened and slightly broken up. 

 The sifting gives a small amount of fine flour. 

 This comes from the center of the grain and, as 

 has been previously stated, makes a poor grade 

 flour. This is sent through the purifier, which 

 removes particles of bran, fuzz, and dirt, and the 

 product is called first break flour. First break 

 flour is not added to the middlings but is sold as a 

 low grade flour. Sometimes it is added to the 

 shorts and used for animal feed. 



After the first separation the bulk of the grain 

 is still left and goes through the second break. 

 The rollers here are closer together and other parts 

 of the interior of the grain break down under this 

 process. These parts are separated by sifting and 

 the product here is known as second break mid- 

 dlings. This, in turn, is sent to a purifier. The 

 remainder, which now looks quite like bran, goes 

 to the third break, which reduces other portions 

 of the interior of the grain so that they may be 

 separated as third break middlings. Inasmuch 

 as this process continues through 6 or 7 breaks, 

 practically all of the interior part of the wheat 

 grain is broken and removed, leaving the tough 

 outer part as bran. 



