SWEETENED CONDENSED MILK COOUNG 



105 



Pig-. 35. Cooling- tank for 

 sweetened condensed milk 

 Courtesy Arthur Harris & Co. 



entire time of cooling should last about 

 two hours. The cans should revolve 

 slowly, rapid stirring enhances the 

 precipitation of sugar crystals. In order 

 to scrape the sides of the cans efficient- 

 ly, when the cans revolve slowly, 

 (about five revolutions per minute) it 

 is advisable to use two paddles in each 

 can, scraping the cans at opposite sides. 

 When the milk is sufficiently cooled 

 the cans are stopped, the paddles lifted 

 out, scraped and removed, and the 

 cans taken out of the tank. This me- 

 thod of cooling sweetened condensed 

 milk is still in vogue in the majority of 

 condenseries. It is obviously crude, laborious and time-con- 

 suming. 



In some factories the condensed milk is transferred from 

 the pan direct into 

 large tanks and is sub-, 

 sequently cooled by 

 pumping it with a high 

 pressure pump through 

 a series of coils sub- 

 merged in cold water. 

 This method is labor 

 and time-saving and 

 the objectionable fea- 

 tures of agitation are 

 avoided. On the other 

 hand, there is danger 

 <>f too rapid chilling, 

 which tends toward ex- 

 cessive sugar crystalli- 

 zation and the produc- 

 tion of rough, sandy 

 and settled milk. 



Within recent years 



tVif> 11CP r>f rirrnlar taiilrc ^* Ti S- 36 - Vertical COil cooler 



CUiar tailKS Courtesy of j en sen Creamery Machinery Co. 



