scratched, and food sticks to the scratches.
Beginning in the 1980s, flexible nonstick
sheets and containers made of silicone
have been used by bakers to line metal
baking sheets or replace molded metal
pans. Silicone is also a long-chain
molecule, with a backbone of alternating
silicon and oxygen atoms, and small fat-
like carbon chains projecting from it. The
backbone gives the material its flexibility,
and the hydrophobic projections make the
surface behave like a permanently well-
oiled pan surface. Food-grade silicones
decompose at temperatures above about
480ºF/240ºC, so like nonstick pans,
silicone bakeware must be used with some
caution.Copper
Copper is unique among the common metals
because it can be found naturally in the