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[GreenYes] Re: plastic? or wax? coated milk cartons

Title: [GreenYes] Re: plastic? or wax? coated milk cartons

I've composted milk cartons occasionally in my backyard system.  The 
plastic coating ends up as a thin grey crinkly film of pretty 
degraded plastic; everything else decomposes quite readily into 
humus.  Ditto for many of the paper drink cups and glasses that 
abound in Berkeley since we banned styrofoam containers almost twenty 
years ago.  It's easy to pull the plastic out of the finished compost 
by hand, but I remember it was quite a problem at Urban Ore's Compost 
Farm because it plugged the industrial screens and made life 
miserable for our employees who were trying to produce a saleable 
product, meaning no resistant plastic bits of anything.

Waxed box cardboard decomposes readily with no plastic residue.

Dan Knapp
Urban Ore, Inc.
On Nov 29, 2007, at 7:29 AM, M.Simons wrote:

> On Thu, 29 Nov 2007, Eric Lombardi wrote:
>> I think Matt is correct on this ... in fact, I was told at a USCC
>> conference a couple years ago that wax was phased out almost 20 years
>> ago!!
> I think a good question is: When a gabled coated-paper milk/juice 
> carton
> decomposes/composts, what is left of the plastic if it's a plastic 
> coated
> box?
> --
> MS
> >

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