The instructions here were put together by a member of the Corvallis Sewing Brigade and have been approved for use. It is for a mask with pockets and ties. Please do not put metal into the masks. Health care providers are unable to continuously use the masks in this case so they are not accepting them.
This was the original pattern, approved by, and worked on for Samaritan. It is the one without the pocket and has basis instructions. A move to make a mask with a pocket for filter material has been made. This mask pattern can still be used if your institution does not wish to have masks with filter material. If elastic is not desired modifying to make ties is relatively easy using bias tape or serged straps.
The instructions here are for masks with ties not elastic.
This tutorial is intended to help those who are new to pleating and need some assistance in figuring it out. Remember that you want your pleats going downward so mask does not catch debris in the pleats.
This pattern was digitized by me from a pattern that a member from the Corvallis Sewing Brigade got approved by the Veterans home in Lebanon. It is constructed using Tyvek housing wrap (a vapor barrier material)
The finding of this study is that the best material to use is 100% cotton. The material shirts and pillow cases are made of. Able to catch larger particulates To measure effectiveness, they shot Bacillus atrophaeus bacteria (0.93-1.25 microns) and Bacteriophage MS virus (0.023 microns in size) at different household materials.
The JoAnn's in Corvallis is still open and if you ask an associate for material for making masks they will give you pre-cut material free of charge. Because of their contribution to making mask they are being considered an essential business and at this time will not be closing.
There are many small companies stepping up to help those on the front lines. Softstar Shoes is one of those small companies. Based in Philomath, OR they are one of those dedicating time and space to fill the void of PPE.