A casting pattern is
basically a shaped form of either metal or wood where sand is packed around it
in the mold. When this pattern is removed, the resulting cavity would be
exactly the shape of the pattern object that was to be cast. The casting
pattern should however be designed in order to be easily removed without any
damage done to the mold. The pattern should be also be perfectly dimensioned
and should be very durable for the intended use. The patterns that are used in
sand casting can be made of plastic, metal, wood or any other material. The
casting patterns are made to the right standards of construction this is
basically because they can last for a reasonable time. The durability of the
pattern would however depend according to the quality of grade in the casting
pattern. If the pattern is made of right quality then they would be constantly
providing dimensionally perfect casting patterns.

The element of Air is the life-energy which has been related by the Eastern Wisdom to Prana.

Prana it is a part of our breath, the eternal inflow and outflow of the vital air.
Prana not only is linked to all the living beings on earth as a basic factor , but it is the life essence of every plane in the Cosmos (Master D.K.).

The air brings within this aspect of life a vivifying and correlating energy pervading everything, anywhere. Prana radiates from the sun and when it comes into contact, via the ether, with our inner thoughts, ideas or ideals, it can modify their vibrational qualities; prana strengthens the fertile mind and the open heart.