[size=150]USE THEM![/size]Copper pots and brass pots are tinned these days for marketing to modern buyers...
it is not necessary.Perhaps you've heard, "
Cooking in copper that is untinned will make you sick." Perhaps you've heard it this way, "
Cooking acid-foods in copper will make you sick." A lot of people have heard either or both, and so the copper smiths have to tin their copper or brass kettles.
BUT...
Apple Butter is highly acidic, and it is ALWAYS made in untinned copper kettles, so why doesn't that kill all those people who buy apple butter at the craft fair? Beer is brewed in copper vessels....then there's distillation in copper stills, and when you get rid of the methanol from the distilling, folks aren't still poisoned by the use of the copper...
The truth is...
it's not the copper that is toxic. When copper tarnishes it forms
verdigris, a green colored tarnish, that is made up of one or more these: copper carbonate, copper chloride, or copper (II) acetate. Those compounds are what make you sick, not the copper coming into contact with the food. So you will find that copper kettles for beer, or for apple butter, or for distilling, are very clean and bright...no verdigris = no worries. So don't leave coffee, tea, lemonade, pickled anything (vinegar is very quick to form verdigris), tomato sauce, or apple butter , in contact with the copper overnight and you won't get verdigris forming, and you won't get sick.
LD