These can be conventional or slip casted. The conventional construction of a porcelain
crown involves compaction, firing and glazing. Briefly compaction involves mixing of
powder with water and binder to form a paste by spatulation, brush application, whipping
or vibrating, that is aimed at compaction, which is painted over the die that is previously
coated with platinum foil. This paste is made from different porcelain powders to mimic the
esthetics of natural teeth. Usually, an opaque shade (to mask metal core), a dentin shade and
then enamel shade is used. The enamel shade is selected from shade guide matched to
patients actual tooth shade.