| A colloidal suspension (“liquid slip”) is fed into a porous
filter cavity (“the mould”) |
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| Carrier liquid is forced from the
suspension into the mould material as filtrate |
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| The solid material remains as a filter
cake in the shape of the mould (the “cast”
piece) |
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| Air injected to the mould walls (“release air”) removes
(“demoulds”) the piece from the
mould |
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| The release air continues to ”purge” the mould of filtrate and any
particles that have penetrated the mould pores |
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