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"Jo Schaper" <[EMAIL PROTECTED]> wrote in message news:[EMAIL PROTECTED] > This is going to sound flip, but write it on the wall of a cave. > > Much of the cave art is at least that old--it was done with some simple > material which stains the rock (ground hematite/chalk/charcoal etc.) > and done in an inaccessible place with controlled temperature and > humidity conditions, to minimize weathering. > > Now exactly how you are going to paint emulsion on a cave wall, and what > it should consist of, and how to expose it--well, that's up to you. > Maybe stencil it with a screenprint technique... Of course, we wouldn't want to encourage screenprinting of modern "art" on our cave walls though, would we? > howard wrote: > > Can't think of an appropriate Ng, so here goes... > > > > How do I make a photographic image last a very long time ? I > > mean a *VERY* long time. I'm talking 5,000 - 20,000 years ! > > > > Not digitised but as a viewable image, or negative/slide/print. > > > > Sealed in glass, in a vacuum ?? Laser burn, or etch the image > > granite or carbon? Or natures way, in amber. ? > > > > > > Hmmmm ?? > > > > > > Howard. > > > > > > > > > > > -- > Geo Communications Services -- www.geocommunications.net > Jo Schaper's Missouri World -- http://www.missouriworld.net >
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