Should you be lucky enough to know a quilter, ask them to make you a mask. Tests performed at the Wake Forest Institute for Regenerative Medicine in Winston-Salem, N.C., showed great outcomes for N95 Masks For Sale using quilting fabric. Dr. Segal, of Wake Forest Baptist Health, who led the study, noted that quilters tend to use high-quality, high-thread count cotton. The best homemade masks in his study were just like surgical masks or slightly better, testing within the range of 70 to 79 percent filtration. Homemade masks that used flimsier fabric tested as little as 1 percent filtration, Dr. Segal said.
The most effective-performing designs were a mask constructed of two layers of high-quality, heavyweight “quilter’s cotton,” a two-layer mask made with thick batik fabric, and a double-layer mask with the inner layer of flannel and outer layer of cotton.
Bonnie Browning, executive show director for the American Quilter’s Society, stated that quilters prefer tightly woven cottons and batik fabrics that fully stand up over time. Ms. Browning said most sewing machines can handle only two layers of fabric when creating a pleated mask, but somebody who wanted four layers of protection could wear two masks at the same time.
Ms. Browning said she recently reached in the market to quilters on Facebook and heard from 71 individuals who have produced a combined total of nearly 15,000 masks. “We quilters are extremely much within the thick of what’s going on with this particular,” said Ms. Browning, who lives in Paducah, Ky. “One thing most people have is really a stash of fabric.”
Individuals who don’t sew could try COVID-19 Masks For Sale, produced by Jiangmei Wu, assistant professor of interior decorating at Indiana University. Ms. Wu, who is renowned for her breathtaking folded artwork, said she began designing a folded mask out of a medical and building material called Tyvek, as well as vacuum bags, after her brother in Hong Kong, where mask wearing is normal, suggested it. The pattern is provided for free online, as is also a video demonstrating the folding process. In tests at Missouri University and University of Virginia, scientists found that vacuum bags removed between 60 percent and 87 percent of particles. However some brands of vacuum bags may contain fiberglass or are not as easy to breathe through than other materials, and shouldn’t be utilized. Ms. Wu used a bag by EnviroCare Technologies, which has stated it fails to use fiberglass in the paper and synthetic cloth bags.
“I wished to create an alternative for those who don’t sew,” said Ms. Wu, who said she is speaking to various grouPS to find many other materials which will be effective in a folded mask. “Given the shortage of all sorts of materials, even vacuum bags might run out.”
The scientists who conducted the tests used a standard of .3 microns because which is the measure employed by the National Institute for Occupational Safety and Health for Masks For COVID-19 For Sale.
Linsey Marr, a Virginia Tech aerosol scientist and an expert in the transmission of viruses, said the certification method for respirators and HEPA filters focuses on .3 microns because particles around that size are the hardest to trap. While it seems counterintuitive, particles smaller than .1 microns are in fact much easier to catch because there is a large amount of random motion which makes them bump to the filter fibers, she said.
“Even though coronavirus is about .1 microns, it floats around in a wide range of sizes, from around .2 to many hundred microns, because individuals shed the virus in respiratory fluid droplets which also contain lots of dkbeiy and proteins and other things,” said Dr. Marr. “Even when the water within the droplets fully evaporates, there’s still lots of salt and proteins as well as other gunk that stays behind as solid or gel-like material. I do believe .3 microns is still ideal for guidance since the minimum filtration efficiency is going to be somewhere around this size, and it’s what NIOSH uses.”