You can find out how to from a County Extension agent (4-H) office. This is usally a hands on class, also if you have a good sized Mormon (LDS) population they have classes and look forward to teaching unenlightned. They also buy in bulk, and use metal canning. I agree completely with canning of food, eletric was off in the Louisville area for over a week for some people (thousands). You must learn the proper way, a improper canned green bean can kill you just as dead, sometimes with more pain than a round!