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Observations on the Washing of Milk Cans¹

Bureau of Chemistry, United States Department of Agriculture

ABSTRACT

The last container used for transporting milk between the milk shipper and the city dairy is the milk can. The invariable practice in the city in which this investigation was made was for the city dealer to wash the can before returning it to the shipper. Where the milk is shipped direct to the city dairy by the producer the milk remains in one can practically from the time it leaves the cow until it reaches the city. When the milk is handled through a receiving station two cans are used. The first belongs to the producer and holds the milk until it is delivered to the receiving station where it goes into a can belonging to the purchaser. Cleanliness is a prime requirement. A dirty can will contaminate the milk placed in it. In the case of the direct shipper the cans are washed, and in the larger city milk plants steamed, before they are returned to the producer.

¹ This paper presents a portion of the data obtained during an investigation of the milk supply of one of the large central western cities under the Food and Drugs Act. Published by permission of the Secretary of Agriculture. Mr. R. S. Smith of the Bureau of Animal Industry assisted in the collection of samples and in planning this piece of work which was finished and written up by Mr. Webster.