Dating evaporated milk cans

Nonfat dry milk has a shelf life of 12-18 months under the conditions described above.Once opened, dry milk should be stored in an airtight container.Cans are best stored in a cool, dry area and inverted every 2 months to avoid separation of water and solids, according to the National Dairy Council.Unopened, they are safe as long as the cans are intact; however, they may thicken, carmelize, and turn brown with time.

“The humble tin can,” Rock wrote in , “formed one important link between the developing western frontier of the United States and the industrialized East.” Rock spent most of his career as an archeologist at Klamath National Forest, near the California-Oregon border.

Powdered milk (water extracted entirely) has a shelf life of 6-9 months when stored at lower than 80° F and less than 65% relative humidity.

But the protein and sugars in powdered milk, whether opened or not, react over time to cause it to brown and become clumped and off-flavored.

He gathered some of the first cans in his collection there.

The trappers and traders of Hudson’s Bay Company, a fur-trading business, were the first known travelers from the eastern edge of the U. to find their way to northern California, a resource-rich region, in the 1820s.

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