If you ever wondered, yes, it is possible to can milk. I learned how on this website:
https://hoeggerfarmyard.com/canning-milk/
If you have any questions, you might want to refer to the original.
Also, even though this technique could be considered a beginner one, I made the assumption that you are not a first-timer and skimmed over some of the basics. If you are new to pressure canning, there are many beginner pressure canning tutorials on this platform, so go watch one of two to learn the basics, and then come back here to learn how to can milk!
Link to the Mother Earth News instructions for canning milk.
How to Can Milk and Make Pudding From Canned Milk
https://www.motherearthnews.com/real-food/how-to-can-milk-zmaz84zloeck
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Music - "LITTLE TOMCAT" by Josh Woodward. Free download: http://joshwoodward.com/
Creative Commons 4.0 Attribution
https://creativecommons.org/licenses/by/4.0/