Costs

Our particle counter is in need of a calibration. It costs $$$$ to get it calibrated.

So, would you like to help us test more material, put together a more robust material library (by 2 diy homebodies) that is open for the diy mask community to use during covid-19? The library can also help general consumers check cloth filtration capability of the cloth masks being sold out there.

https://www.gofundme.com/f/material-filter-testing-breathability