| http://www.w3.org/ns/prov#value | - it is pretty hard to scratch a glass smooth top range even with cast iron. the main problem with cast iron that I found out about is that cast iron, when it gets older will buckle across the bottom like some thinner types of stainless steel and copper will do. this creates air space between the burner and the pot so you get uneven heating which I find very frustrating.
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