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Re: [PSUBS-MAILIST] Sub as panoramic film platform



In a message dated 9/21/2010 9:47:39 A.M. Eastern Daylight Time, greg@precisionplastics.com writes:
The material only shrinks once.
Is there a percentage of shrinkage for a given thickness and/or diameter that can be used to "size" a disk so that after cutting it round, machining the edge, and post work annealing the correct diameter can be reached ?
Or, stated another way, if the cast acrylic only shrinks once, can the shrinkage factor be added to the original cut size so that after annealing the disk, it's diameter fits the ring within the acceptable tolerances depending on what sealing method is used ?
Frank D.