current n95 testing method (IMAGE) DOE/Sandia National Laboratories Caption The current N95 testing method requires a mask to be attached to a flat surface using hot wax or putty. (Photo courtesy of the National Institute for Occupational Safety and Health) Credit Courtesy of the National Institute for Occupational Safety and Health Usage Restrictions No restrictions. License Public Domain Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.