Domed plastic lenses (how to)

[Rickabilly]

You know that if the boiling water doesn't work for you, you can also use a standard kitchen oven which gives a greater range of temperatures. The appropriate temperature for the plastic in question is usually published on the web some place, use the name on the protective paper or plastic film and google it for this info , otherwise do a test at 100 C and work up to higher temps if you find that the plastic is too rigid, or of course go cooler if it gets too floppy.
Regards
Rick