On Tuesday 29 November 2005 14:16, DarkroomMagic wrote: > As a side note: > > Some PET bottles are not straight PET. Coca Cola for example is using > plastic bottles made from a co-extrusion or co-injection process, which > contain up to 7 layers of different polymers, aiming to stop gas > permeability and maintain the 'fizz' over a long time. The tiny bottles are > later heated and blow-molded into their final shape. > > However, I don't know how resistant Coke bottles are to darkroom chemicals > compared to the typically used polyethylene bottles. > > If I remember correctly, Coca Cola had a patent for this process, and it is > now used to mold automotive plastic fuel tanks. I got to say this is kind of scary. Do we really need coke that lasts for twenty years in the bottle? Nick ============================================================================================================= To unsubscribe from this list, go to www.freelists.org and logon to your account (the same e-mail address and password you set-up when you subscribed,) and unsubscribe from there.