Hello Mac, I have an idea that you might want to try. It appears that what may work is a very thin protective coating. The laminations and overlays are probably all quite thick. You could make your sundial from regular paper and spray a clear coat on the surface. The protective coating used on cars might work. I don't know if you can buy this in a spray can but perhaps you may know someone at a body shop. If they were willing to spray a couple of sundials for you it could be done so one has a very thin coating and another a thicker coating. This would give you an indication of how the thickness of the clear coat affects the terminator.
There is also a special clear coat that can be sprayed on outdoor murals and allows you to remove graffiti. But I know this stuff is quite expensive. Best wishes, Carl -----Original Message----- From: Mac Oglesby [mailto:[EMAIL PROTECTED] Sent: Friday, May 18, 2007 6:25 PM To: Carl & Barbara Sabanski Cc: Sundial List Subject: RE: Waterproof papers Hi Carl, You wrote: >If the cylinder azimuth sundial was printed on normal paper and then >laminated that would give a durable dial. Thanks for the suggestion. Alas, in my tests, an azimuth cylinder sundial with a laminated paper dial face does not have a good light/shadow boundary. I have tried laminations and overlays of different thicknesses. It seems that even a very thin layer of any transparent surface seriously deteriorates the terminator. A vinyl dial face, as printed by a commercial sign shop, seemed like a great way to create a durable azimuth cylinder sundial, but the terminator is weak. Best wishes, Mac --------------------------------------------------- https://lists.uni-koeln.de/mailman/listinfo/sundial
