Del, There is a lot of this cooling which takes so long it might be called "curing" that is mentioned in the publication of American Steel and wire of the piano maker's conference in Chicago starting in 1914. I lost my copy, if any one wants to sell theirs I offer 20 dollars. If the binding is shot that is OK as that makes it better to scan. ---ric > > ....Foundry castings need time to "cure" for strength.... > > Do you have any technical reference for this? I've been trying to track down > solid information on the subject for some time--but to no avail. It's long > been assumed and talked about--at least within the piano industry--but I'm > after specific details. What 'strength' parameters change over time? > Stiffness? Impact strength? Compression strength? What? > > Del >
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