1. 
   Sandblasting
   A process of blowing sand by compressed air with considerable force through a hose against an object. See also: Shot Blasting.
   Found op http://www.diracdelta.co.uk/science/source/s/a/sandblasting/source.html
   
   
2. 
   sandblasting
   Process used for creating matt surface finishes on glass, invented in the USA in 1870. A design area is masked off and the object is subjected to a high-pressure jet of sand or powdered iron to leave the exposed area with a rough, greyish finish.
   Found op http://www.encyclo.co.uk/visitor-contributions.php
   
   

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