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I tried to use an old spool of PDA and the filament would keep breaking. New filament will discolor white but stay intact when you bend it. This old filament would break off at a clean 90 degrees when you bend it with no discoloration. However, our new material is Hatchbox PLA and the older is a different brand.

0scar
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Perry Webb
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    It becomes brittle when it takes up moisture, how much depends on humidity and time. The better you store it the longer it takes to become brittle. – 0scar Jun 19 '19 at 01:26
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    Duplicate of https://3dprinting.stackexchange.com/questions/1404/can-aged-pla-be-refurbished ? – anttix Jun 19 '19 at 06:21
  • There are many theories why PLA filament becomes brittle. See the link in previous comment. – anttix Jun 19 '19 at 06:24

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