What is glossy surface?

Gloss is possessed by most materials encountered in everyday life, and its occurrence is so common that persons seldom stop to give it notice. People are, nevertheless, responsive to the general appearance of objects and nearly everyone can form opinions as to the beauty, attractiveness, or striking appearance of things they see. Gloss is one of the major factors in appearance, and several methods for determining it have been developed.

The glossiness of a surface is the appearance which results from its power to reflect light specularly. For any given surface, glossiness may vary with conditions of illumination and directions of view, but gloss is considered to be an inherent quality.

Glossyness of the surface means, the surface’s shininess / sheen / lustre / light reflecting ability / surface containing un-oxidized metal, etc. More briefly and accurately, refer the below image

Find the difference:

Specular gloss shall be determined in accordance with EN ISO 2813, BS EN 01062-1.

If the reflectance measured at 60° is less than 10, the measurement shall be repeated at 85°, the value obtained at 85° determines the class.

In practice, the gloss level achieved will depend on the state and nature of the substrate. Gloss cannot be measured on textured coatings and coatings with coarse or very coarse granularity.

More the reading value, higher the gloss.

As per, MPI (Master Painter Institute) Architectural Painting Manual Guide Specification Revision – September 2012, glossy is classified as:

This can be tested as per ASTM D 523: This test method covers the measurement of the specular gloss of nonmetallic specimens for glossmeter geometries of 60, 20, and 85°

Let see how to test the gloss - using Gloss Meter

Many thanks to Google.com, http://www.paintinfo.com....