Andrew Wallace, from Andrew Wallace Architects, an architect and interior designer from Liverpool went to an exhibition in London.
This mould is used in the manufacture of the Juicy Salif citrus squeezer . The mould is costly to make, but the income from the many thousands of squeezers produced from it covers the initial investment. After continual use the surfaces of the mould begin to wear away and lose their sharp definition.
When this happens a new mould is made, in order to maintain the precise lines of the original design, and the old mould is retired.
Liverpool architects and achitects elsewhere in the UK may be interested to see this exhibition.