I see a couple options on Amazon for vacuum bags 40cm x 40cm, intended for 3D filament spools. This seems like a great idea, but so far I have had zero success.
I bought this one:
…and I haven’t been able to get the bag to hold vacuum for more than a few hours. I am leaving it undisturbed, not playing football with it. I read in reviews that only a fraction of the bags work, so I’m trying more of them, but so far haven’t had one stay sealed for even a half day.
I ordered another similar looking brand this morning:
What bags have people used that actually work well? I see two basic re-useable bag designs on amazon, one has a screw cap and the other does not. I am considering to get the heat-sealed type. That would hold vacuum I assume, but is non-reusable. Anyway, I will report any further result here.
My Amolens worked great for 1 or 2 draw downs, but soon after that, they fail to fully seal. I have some which are still on the 1st or 2nd draw and have been locked solid to the filament for 6+ months. I assumed the limited use was par for the course.
Domsanistor 3D Printer Filament Storage Bags Vacuum Kit,10Pcs Filament Vacuum Bags with Automatic Pump/Humidity Indicator Cards/Clips, Filament Bags Storage Spool Sealing for Keeping Filament Dry https://a.co/d/4pYXP3y
Maybe 5-10% of the bags have had issues holding a vacuum so far. I found the humidity indicator strips to be worthless. They even ship unsealed and never register jack. I half fill organza bags with color changing desiccant and place the bag in the center of the spool before sealing. I have maybe 30-40 spools stored this way.
SAOYOAS 100Pcs 4x6 inch Organza Bags, Drawstring Organza Wedding Party Christmas Favor Gift Bags, for Festival, Party, Bathroom Soaps, Pouches Gift Bags. (White) https://a.co/d/6YcXeFD
Weird. The bottom one you listed with the battery powered pump works fine for me. But you have to push pretty darn hard to get it to slide all the way onto the suction point. Won’t pull a vacuum otherwise. Takes a while to see any change if you don’t squeeze out most of the air before starting.
I’ve never tried the bags. Seems like a waste of plastic (yes, I know, how ironic) for a sub par result. I use a dehydrator to dry and then store in a simple desiccant bin with feeder hoses the spools I need to keep dry for common use.
When you suck the air out don’t suck it down real tight where the spool bends etc. Make sure the zip side is secured. I run the tool over it 3-4 times. Then I sucked it down till it is formed to the spool. You will never get all the air out. This is why you want to add silicone. Make sure the cap is tight also. Not super tight but not loose either.