This was an ornament I printed roughly 6 years ago. Being a Christmas ornament it spent most of those 6 years stored in my roof space.
Being in Australia this would have been subject to average temperatures of 30 to 35 degrees c but also peaks across summer approaching 70 degrees c. Also in high humidity.
The PLA crumbles into tiny pieces at the softest touch.
I thought it was interesting that PLA would start to break down in these conditions.
it’s a starch-based polymer, isn’t it? it will be readily metabolized by the various ubiquitous species populating our biosphere. i suppose it’s a good thing. possibly the only microplastic that doesn’t suck