I got a call today at work from a nurse from UC Health. They have a shortage of N95 masks for their workers. There is a 3D model of an N95 mask, which I have downloaded and am building right now. It's a 2.5 hour build, plus the user still has to provide the filtration, which my new nurse friend at UC Health is working on at her end and looks like there may be an answer in their inventory. Turns out that surgical masks they have a'plenty, but those don't have small enough pores to filter out viruses, only droplets like coughs. N95 masks have smaller filtration. We had a good phone conversation and several follow up emails. N100 masks are even better. Those are those ones we use when we're painting our Land Cruisers and have those charcoal cartridges.
Bottom line is,
(1) Surgical masks don't protect our front line health care workers, they don't have the smaller pore size needed for viruses.
(2) N95 Masks do, but they don't have enough of them. This nurse told me today that they only get one per worker per day.
(3) N100 Masks work also.
I am 3D printing N95 masks (it is a rigid design with a round spot for users to add the filtration membrane) as fast as I can. The design calls for the post-printing step of heating them and bending them into the shape of a mask. But as members of Rising Sun, please check your stash of regular paper masks and please donate those to hospitals. I can give contact info, email me at
web@american3dprinting.net.