Surface Veils are considered to be Nonwovens, some may call them matts, as well. They are typically very fine or thin.
A veil consists of chopped fibers which are randomly, chemically bonded.
The advantages of using a veil are
- to "even-out" surfaces, e.g. when using heavier materials which would leave an unwanted print or pattern behind when making molds or parts,
- control the resin penetration in multi-layer constructions,
- aid in surface sanding,
- aid in bonding multiple layers when placed in between
Always make sure to test the resin compatibilities before use, because your lamination may come apart quickly.