PETG does not absorb water !
And here are the results of the PETG humidity test

I received a sample of the Formfutura Bronze PETG last Thursday and immediately tried it out the same day. When priming the extruder I noticed that the extruded filament (Flashforge Creator Dual, 225 C nozzle temperature, extruded using the display load filament feature) was very rough, indicating a LOT of absorbed water.

I vacuum dried the sample at 50 mbar / 70 Celsius for over 6 hours to get rid of the water. Today I repeated the extrusion, and made a comparison picture of the extruded filament of last Thursday (I save a bit) and today.

As can be seen, the sample as it arrived gave enormous amount of steam bubbles (bottom). After vacuum drying it is now extruded perfectly smooth (top).

Shame on Formfutura for sending out poor samples.

PETG_Bronze_Formfutura1.jpg