tert in seattle wrote:

>
> >> I'm not so sure that is always true about it containing silicone, mine
> >> doesn't. And I can assure you that large commercial bakeries do not
> >> use silicone paper for anything.
> >
> >If it doesn't have silicone is is not parchment paper. By definition,
> >parchment paper is treated with silicone. Large bakeries do use them. FWIW
> >but googling "bakery supplies parchment paper" the first hit was a
> >commercial supplier that sells parchment paper pre-cut to baking pan sizes
> >in boxes of 1,000 sheets, hardly the quantity for home use, since most
> >rolls sold for household use are only 30-40 feet long.
>
> I believe sheet pan paper has an indefinite shelf life

It had better, because 1,000 sheets would last me a life time. A 30 foot roll
lasts 2-3 years around my house, so imagine how long 2,000 feet of it would
last (close to 70 years). Obviously, there is a commercial use for parchment
paper (with silicone), contrary to Sheldon's suggestion that large commercial
bakeries do not use it.