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Talk:Jar lids

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According to the Polyvinyl Chloride (PVC) Material Safety Data Sheet at http://www.solvinpvc.com/static//wma/pdf/7/4/9/homo_EN.pdf PVC can thermally decompose at temperatures above 120 degrees Celsius (248 degrees Fahrenheit) if held for more than 3 hours. This decomposition might produce vinyl chloride monomer or free chlorine gas both of which are truly dangerous chemicals. Chlorine that can combine into dioxins in the presence of organics. It seems likely that well insulated solar cookers could reach these temperatures.

To me the paragraph below seems to be a logically flawed appeal to the authority of interested parties namely companies who make money selling PVC lined lids. The changes that will result from greater public awareness of the hazards of PVC, Teflon, polycarbonate (BPA) and other plastics that routinely touch food will be difficult for these companies. I propose that the paragraph below be edited or deleted. the preceding unsigned comment is by 74.250.162.194 (talk • contribs) 18:04, 18 October 2008

You might want to take the word of the US jar manufacturer that PVC in jar lids is stable up to 250
degrees F. You might want to guess that a whole nation of food manufacturers would object to pvc being
standard in jar manufacturing if they had any doubts at all about its safety and stability under all
imaginable conditions. You might want to take the word of our expert who thinks that even an unstable
PVC coating on the lids would not cause health problems.

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