PLA Basic Light Grey Problem?

[MZip]

There’s a way to find out if filament is carrying water and approximately how much (in terms of if it will print well or not).

How:

Sunlu S2 VS Creality Space PI Bake-Off Review

There’s an easy way to get an idea how much moisture is in any spool of filament. It’s not a direct measure of water content but is indirect. Just put a spool and a hygrometer in an impervious container and seal it. No desiccant. I’ve used poly cereal boxes and gallon ziplock bags. Ziplock bags let water through them but the spool will overwhelm the virtual water leak. Give it 10-12 hours and read the hygrometer. I haven’t gotten many to try this so there’s not a body of data to guide you but w…

Why:

Sunlu S2 VS Creality Space PI Bake-Off Review

It’s a neat trick and really works well. Why it works is desiccants and desiccant-like materials will pick up certain amounts of water at various humidities so you can generate monotonic curves of moisture content vs humidity. The graph is desiccants but filament will behave similarly. These are curves but the shapes don’t really matter. What matters is there’s a particular moisture content at one humidity and another moisture content at another. That’s how humidity in a sealed box or bag of f…