(1) Wooden patterns. (2) Resin patterns, and (3) Metallic patterns are available, id each materiel has its own
scope of application according to its strong and weak points. Wooden patterns are used for a trial production as
a preliminary slap for the production of metallic or resin patterns, or for an application of the equivalent quantity
of production.
Resin patterns are used for an application of a medium lot and for production of a relatively simple shape.
Metal patterns are adopted on the conditions requiring mass production and higher intensity and accuracy of
molds,