If you are 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 results for KN95 For Sale using quilting fabric. Dr. Segal, of Wake Forest Baptist Health, who led the research, noted that quilters often use high-quality, high-thread count cotton. The best homemade masks within his study were as good as surgical masks or slightly better, testing in the range of 70 to 79 percent filtration. Homemade masks that used flimsier fabric tested only 1 percent filtration, Dr. Segal said.
The best-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, as well as a double-layer mask with an inner layer of flannel and outer layer of cotton.
Bonnie Browning, executive show director for that American Quilter’s Society, stated that quilters prefer tightly woven cottons and batik fabrics that stand up as time passes. Ms. Browning said most sewing machines can handle only two layers of fabric when you make a pleated mask, but somebody who wanted four layers of protection could wear two masks at a time.
Ms. Browning said she recently reached out to quilters on Facebook and heard from 71 individuals who have made a combined total of nearly 15,000 masks. “We quilters are incredibly much within the thick of what’s going on using this,” said Ms. Browning, who lives in Paducah, Ky. “One thing most of us have is really a stash of fabric.”
Those who don’t sew could try COVID-19 Masks For Sale, developed by Jiangmei Wu, assistant professor of interior decorating at Indiana University. Ms. Wu, who is known 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 common, suggested it. The pattern is free of charge online, as it is 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, many brands of vacuum bags may contain fiberglass or are not as easy to breathe through than many other materials, and shouldn’t be used. Ms. Wu used a bag by EnviroCare Technologies, that has stated it fails to use fiberglass in its paper and synthetic cloth bags.
“I wanted to create a different for those who don’t sew,” said Ms. Wu, who said she actually is talking to various grouPS to locate other materials that will be effective in a folded mask. “Given the shortage of all types of materials, even vacuum bags might run out.”
The scientists who conducted the tests used a typical of .3 microns because that is the measure used by the National Institute for Occupational Safety and Health for N95 Face Mask For Sale.
Linsey Marr, a Virginia Tech aerosol scientist plus an expert inside the transmission of viruses, said the certification way of respirators and HEPA filters focuses on .3 microns because particles around that size would be the hardest to catch. Although it seems counterintuitive, particles smaller compared to .1 microns are in fact easier to catch because there is a great deal of random motion that creates 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 a lot of dkbeiy and proteins along with other things,” said Dr. Marr. “Even when the water in 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 continues to be helpful for guidance because the minimum filtration efficiency will be somewhere around this size, and it’s what NIOSH uses.”