Sorry--in the run-down of plastics, I forgot to say that vinyl, or polyvinyl chloride (PVC) is about as bad as polystyrene. NN 2) Other plastic containers can >be polyethylene terephthalate (PET--recycle numbers 1 or 2, or 4 for ziploc >bags), or polyvinyl chloride (PVC--number 3), or polypropylene >(number 5), or polystyrene (styrofoam--number 6). All are reasonably stable >under normal room conditions, i.e., not exposed to high heat (cooking), but >there are some differences. Good quality polypropylene (meaning no cloudiness >or irregularity in translucency) is best, good-quality polyethylene (again no >cloudiness or irregular coloration) is next best, polyethylene acceptable if >you're not really fussy (again looking for even transmission of light in the >clear forms), and as you might guess, stay away from styrofoam. A big thing >to watch for in plastic containers such as your wreath containers is whether >or not they keep their shape without their lids. For example, if a square >container goes lopsided or out-of-square when the lid is removed, the >container wasn't >cured properly and would be especially prone to off-gassing the plasticizer >(and hence should be avoided for lace or lace-pillows). >
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