Paint sheen 
(重定向自Matte finish)
      
In paint technology, the sheen is the glossiness of a paint finish.  Glossy and flat (or matte) are typical extreme levels of glossiness of a finish.  Glossy paints are shiny and reflect most light in the specular (mirror-like) direction, while on flat paints most of the light diffuses in a range of angles.  The gloss level of paint can also affect its apparent colour.