On May 7, 7:06*am, Bruce L. Bergman
wrote:
On Thu, 7 May 2009 02:45:53 -0700 (PDT), kfvorwerk



wrote:
On May 6, 8:15*pm, wrote:
hi all
i would like to make an aluminum cooking pot .
which aluminum alloy should i use ?

i know this is stupid question but i am not sure for cooking ware
so..i would like to ask same,
*if i use copper ? copper is copper? any particular for health issue?

thanks in advance.

Yoshi.

Copper is poisonous. You'd want to line it with tin.
Karl

* Copper is fine for certain uses, a bare copper kettle is the
preferred vessel for candy making.

* BUT, copper is reactive when exposed to highly acidic foods, and the
resulting compounds in the food taste horrible in small quantities and
poisonus in larger quantities. *So you coat the pot on the inside with
tin, and it has to be renewed every few years or few hundred uses. *

* People used to make a living doing this, tinkers were almostg as
common as blacksmiths and buggy whip makers.

* Nowadays, they make laminated pots with a stainless interior and a
big slab of copper on the bottom for the even heat spread qualities.

* This is also why you NEVER use copper tubing on a soda fountain
(stainless steel or plastic lines only) and why they require special
double backflow valves on the water supply line, so the carbonated
water can not get back into the copper building pipes. *The copper
reacts with the CO2 (carbonic acid) and will make anyone who drinks
the tainted water REALLY sick.

* -- Bruce --


OK so I left out a couple cooking devices it's used in without tinning
but it looks like he's going to use them for a variety of purposes so
not a good idea without tinning. I have one teflon coated AL pan the
rest are natural AL. The hard aluminum hard anodizing is part of a
nonstick process not for food safety. If you want to get scared by
cookware look up what happens when you heat teflon pans too hot.
Karl