FACTORY SANITATION 57 



densery cans reach the farmer in condition, unfit to receive and 

 ship milk in. 



Proper can washing consists of four essential operations, 

 namely, washing, rinsing, steaming and drying. 



The cans should be washed until all remnants of milk are 

 removed. They should be rinsed with hot water until all of the 

 dirty wash water is flushed out. They should be steamed until 

 "piping-hot," and they should be dried until "bone-dry." 



There is IIOAV admirable equipment available on the market 

 for accomplishing these four important purposes, affording ade- 

 quate facilities to enable the condensery to return to the patron 

 cans that are clean, sterile and dry. 



Care of Milk in the Factory Prior to Manufacture. The 

 problem of so handling the milk in the factory, from the time it 

 arrives until it is heated preparatory to evaporation, is an im- 

 portant one, that has received much careful consideration by the 

 foremost condensed milk men. Since bacteriological analyses 

 have shown that, under favorable temperature conditions, the 

 micro-organisms present in milk are capable of doubling in 

 number once every twenty minutes, it is essential that the milk 

 either be Heated to high enough temperatures to restroy germ 

 life, or be cooled to a temperature low enough to stop growth 

 and multiplication, as soon as possible. 



Both practices are feasible, but 

 to heat the large volumes of milk that 

 arrive at the factory, all within a few 

 hours, would tax the equipment of the 

 factory under average conditions very 

 heavily. And unless the condensery 

 were equipped with very large vacu- 

 um pan capacity, much of this heated 

 milk would have to lie idle in the 

 forewarmers for hours, avaiting its 

 12. turn for condensation. This would 



Glass-lined tank for cooling b e undesirable and might prove harm- 



and holding 1 milk before 



manufacture ful to the quality of the finished 



Courtesy of The Pfaudler Co. product 



Efforts have, therefore, been made, especially within recent 

 years, to provide a practical and economical method of cooling 



