One of the most viable and already used sources of renewable energy are concentrating solar power systems (CSP) that convert solar thermal energy into electrical power 1-4. Mirrors are used by ...

Scratch testing is one of the methods that allow well defined characterization of scratch resistance of polymeric materials, both bulk and coatings such as paints. The scratch technique has therefore ...

Although some people may consider it to be â low tech,â using pencils to test hardness is still a method used by many coatings manufacturers and some finishing shops. The test uses special pencils ...