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Old 02-25-2021, 12:15 PM
Doug D. Doug D. is offline
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Join Date: Mar 2012
Posts: 6,209
Default Re: Curiosity Question..( WAPAK )

Pattern creation involved the carving of a pan first in wood (and sometimes other materials), then from it creating a master in brass to which runners and gates were added to create the aluminum version actually used to make sand molds.

For Wapak (and some others), starting with an actual pan in the creation of a pattern cut out a large part of the expense of skilled craftsman work. To account for the ghost marks of other makers on pans, some assume that foundries sold worn or obsolete patterns, but it makes little sense to enable your competitors. We can see from same-maker ghost marks that patterns were costly enough that making alterations was preferable to outright replacement.
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