What recommendations are given for annealing parts made of PLEXIGLAS^® molding compound?

If PLEXIGLAS^® moldings are to be further fabricated, it is advisable to anneal them at about 20°C below the Vicat softening temperature. The duration depends mainly on the wall thickness of the molding. Whereas 30 minutes are sufficient for thin-walled parts, the time increases disproportionately at high thicknesses. It is important for the parts to cool down slowly afterwards, to avoid introducing renewed stresses.

Freedom from stress can be examined by means of the alcohol test. The part is immersed in concentrated alcohol for 5 minutes. If no crazes can be discerned after drying, the part is virtually stress-free.

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