Copper Cookware Information
Modern copper cookware is often lined with stainless steel. Unlike Tin, stainless steel lining tends to cause food to stick. Tin has excellent non-stick qualities and has been used for cooking for hundreds of years. Tin is also excellent for thermal conductivity so it’s extremely compatible to copper.
Most copper cookware made pre the 1990’s was tin lined, with the rare exception of some premium cookware lined with stirling silver.
As a general rule of thumb we recommend that if you can see copper showing through tin to a combined size of about 2 square centimetres, its time to consider having the cookware re-tinned.