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.

When I was young, my mother was very much into hand built pottery. She became pretty good at it and started attending more and more Arts and Crafts shows. To get into the bigger, well known shows you had to send pictures of your work in advance for the promoters to decide if your work was good enough to be in their show. Quite often there were several people (a jury of judges) that would determine the quality of your work based on the quality of your photos.