Parchment Paper Safe vs Teflon?
We learn something new every day.
I never knew anything about parchment paper.
I certainly did not imagine that parchment paper can have silicone, flourine, and 'non-porous' cement.
Millions/billions of loafs are baked in gas, coal, or wood fired ovens.
I won't podner what gases could be detected in a fossel fueled oven.
I believe that an electric oven and Teflon is pretty safe below 476* F.
See also: Parchment paper (baking)
Vegetable (paper) parchment is made by passing a waterleaf made of pulp fibers into sulfuric acid. The sulfuric acid hydrolyses and solubilises the main natural organic polymer, cellulose, present in the pulp wood fibers. The paper web is then washed in water, which stops the hydrolysis of the cellulose and causes a kind of cellulose coating to form on the waterleaf. The final paper is dried. This coating is a natural non-porous cement, that gives to the vegetable parchment paper its resistance to grease and its semi-translucency.
Other processes can be used to obtain grease-resistant paper, such as waxing the paper or using fluorine-based chemicals. Highly beating the fibers gives an even more translucent paper with the same grease resistance. Silicone and other coatings may also be applied to the parchment. A silicone-coating treatment produces a cross-linked material with high density, stability and heat resistance and low surface tension which imparts good anti-stick or release properties. Chromium salts can also be used to impart moderate anti-stick properties.
Modern parchment paper is made by running sheets of paper pulp through a bath of sulfuric acid (a method similar to how tracing paper is made) or sometimes zinc chloride. This process partially dissolves or gelatinizes the paper, a process which is reversed by washing the chemicals off followed by drying. This treatment forms a sulfurized cross-linked material with high density, stability, and heat resistance, and low surface energy – thereby imparting good non-stick or release properties. The treated paper has an appearance similar to that of traditionalparchment.