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Can anyone identify this material?

 
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Someone on one of my local sites offered this for free:



describing it as "10 sheets of clean, dry recycled-fiber batting, packaged in plastic, that was used as insulation for refrigerated deliveries we've received in the past 6 weeks."

Does anyone recognize this stuff and know what's in it? If not full of synthetics, plastic, or toxic waste, it looks like it'd be a useful material. But how to tell?
 
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I have seen it use on bed mattresses, it maybe cotton and synethetics
 
                        
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I recycle wool sweaters, etc and that looks like a mixture of wool fibers there.
 
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Get a soldering iron, nail, whatever hot (like, very hot) and touch it in a few spots. If you get spots melting or curling up, they're plastic. Organic fibers will just blacken and potentially smolder. Could easily have a mix of different fibers.
 
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Looks like shoddy  - old clothes that have been shredded and upcycled.  Im guessing mixed natural and synthetic fibre, but a burn test would tell you more.

It might have fire retardant chemicals depending on the use and country.
 
yeah, but ... what would PIE do? Especially concerning this tiny ad:
The Wheaton Eco Scale
https://permies.com/t/scale
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