... certified by SGS. The tin foil sheet mainly used in construction ,decoration ,packing ,printing, cover material ,piping, electronic, elements, ... of the foil shall conform to the requirements given in table 1. Unit: mmThicknessWidthLength SizeVariationSizeVariationSizeVariationLateral bowSlant at ... 70 5.If the chemical composition of tin foil in any lot is not satisfied with the requirements another ...