Systems and methods are disclosed for a platform to form a
three-dimensional article from successively selectively solidified layers
of a liquid medium which is solidifiable by application thereto of a
prescribed energy. The platform can be coated or uncoated. The platform
can have an array of openings therethrough. Upon completion, the article
can be removed from the platform using a punch having a plurality of
projections adapted to engage openings in the platform. Alternatively, a
tool can be used to push articles from the platform.