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In a message dated 1/15/04 10:41:39 PM Pacific Standard Time, ojaibees@ojai.net writes:
How would you "stress-relieve" it after machining? I not sure what process you are referring to? Machining leaves residual stresses. As I understand it from the white paper "Window Considerations", the process is to heat treat the acrylic prior to machining to remove residual moisture, machine it, then heat treat again (~300F for several hours with slow ramps) to relieve the machining stresses that can cause cracks and crazing.
Warm Regards
Shawn
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