Kiln casting is a general-purpose term that refers to the melting of glass
inside a mold inside a kiln. It contains many of the elements of fusing and
slumping, but is generally more complicated and requires a greater understanding
of warm glass principles.
The simplest kind of kiln casting involves the placing of glass frit or
particles on top of a mold to form a bas relief (not unlike a plaque), but in
most kiln casting the glass is totally encased inside the mold. Kiln casting can
be done with pieces of glass of just about any size, ranging from frit to larger
chunks that barely fit in the kiln.
Pate de verre is sometimes used as a generic term for kiln casting, but it
actually refers to a very specialized kind of casting in which a mold is filled
with a paste containing very small pieces of glass, then fired.
The steps involved in kiln casting can vary depending on the particular kind
of casting, but all casting projects generally contain these steps: