Materials: Porosity, permeability and roughness
By Dr. David R. Roisum
Web handlers should know about roughness because it informs us about air entrainment, traction and windability. More about those essential topics in the next slides of the video clip (see link below).
For certain web products, roughness-related topologies such as permeability are CENTRAL to product performance. These would include but are not limited to absorbent capacity and rate, insulating value, filtration properties, permeability, printability and many, many more.