Which common fabrics make the best masks?

Researchers at the University of Chicago have revealed which materials are best at filtering out aerosol particles for those making their own masks. They say a combination of two fabrics are the most effective.

A combination of cotton with natural silk or chiffon can effectively filter out aerosol particles, as long as the fit is good, according to their study, which was published in ACS Nano.

Using an aerosol mixing chamber to produce particles ranging from 10 nm to 6 μm in diameter, and a fan to blow the aerosol across various cloth samples at an airflow rate corresponding to a person’s respiration at rest, they measured the number and size of particles in the air before and after passing through the fabric.

They found that ...

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