Desiccant Tube

thingiverse

I created large storage containers out of cookie tins to hold partially used filament spools, but I realized that there was still not enough space for a desiccant container. Therefore, I designed one specifically to fit inside the center of each spool (view photo #3). To control humidity, I use an indicating type of desiccant (easily found on Amazon in gallons) which changes color from orange to green when it is exhausted and needs replacement (see photo #2). The design features a tube within a tube setup to encourage airflow, both of which have tiny holes that match the size of the small spheres inside. For durability and clarity, I 3D print with clear ABS and treat the finished models in a cold acetone vapor bath for an hour. Clear PLA could also work well, but since I didn't have any on hand, I stuck with ABS. To provide detailed instructions, I am happy to report that my printed design was produced with FlashForge Creator Pro on glass, first applying hairspray as a bed coating and then adjusting temperatures accordingly. With four layers set at 110°C (exceeding my typical bed temperature by five degrees) and an additional four set at 100°C (my typical value), the last ten were brought down to 60°C (reduced from my usual of fifty-five). I followed the established cold acetone vapor bath protocol, setting a quart can into a coffee cup filled with two paper towel layers that are secured using small magnets and creating a raised surface. Models sit atop this makeshift "raft" as it soaks in acetone from below through aluminum foil wrapped around the lid.