PolyDryer Humidity: September

After six months to see how much moisture entered from the 50%RH (±5%RH) basement air:

	2026-09-07
Filament	%RH	Weight – g	Wt gain – g	Gain %
PETG White	26	56.2	6.2	12.4%	Gel
PETG Black	28	57.3	7.3	14.6%	Gel
PETG Orange	34	54.1	4.1	8.2%	Alumina
PETG Clear	37	54.4	4.4	8.8%	Alumina
PETG-CF Blue	38	54.0	4.0	8.0%	Alumina
PETG-CF Gray	34	56.4	6.4	12.8%	Gel
PETG-CF Black	25	56.3	6.3	12.6%	Gel
PETG Blue	38	55.9	5.9	11.8%	Alumina
TPU Clear	34	56.3	6.3	12.6%	Alumina
TPU Black	32	55.2	5.2	10.4%	Alumina

Sorted by relative humidity:

PETG-CF Black	25	56.3	6.3	12.6%	Gel
PETG White	26	56.2	6.2	12.4%	Gel
PETG Black	28	57.3	7.3	14.6%	Gel
TPU Black	32	55.2	5.2	10.4%	Alumina
PETG Orange	34	54.1	4.1	8.2%	Alumina
PETG-CF Gray	34	56.4	6.4	12.8%	Gel
TPU Clear	34	56.3	6.3	12.6%	Alumina
PETG Clear	37	54.4	4.4	8.8%	Alumina
PETG-CF Blue	38	54.0	4.0	8.0%	Alumina
PETG Blue	38	55.9	5.9	11.8%	Alumina

Fairly obviously, there is no correlation between the humidity level and the amount of adsorbed water.

The silica gel beads were rather dark, not that that means much:

All the boxes now contain 50 g of alumina beads.