Re: [PSUBS-MAILIST] Fogging

[David Buchner <buchner@wcta.net>]

At 2314 -0600 02/10/0, Nathanael Henderson wrote:
>....Did you try a good defog (particularly the sort used for
>scuba/snorkling masks)?   The primary cause of fog is just the temperature
>difference between the air and the window causing the moisture in the air 
>to condense on the port, but this effect can be 'fooled' by 'defog'
>treatments that both clean the surface and fill in imperfections, robbing
>the moisture of nucleation points to easily form on.....

This is what that "Rain-X" car window stuff does, I think. Same type of thing? A clear liquid you rub on and buff like wax?

>....rig something up to heat the viewport (since as long as the inside surface
>of it is warmer than the inside air there shouldn't be condensation.)
>You're probably already familiar with the heater wires put in car rear
>windows to defrost/defog them--the principle is the same. 

They would interfere with the view, and waste amps, but I find myself curious anyway for some dumb reason -- is there some kind of resistor-foil or stencil-on semiconductive paint available in a convenient form? Seems like there'd be something out there, perhaps in old-car-fan land, for retrofitting defoggers to the windows of older vehicles?


-- 
David
Osage MN USA
buchner@wcta.net - http://customer.wcta.net/buchner