Snaps

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.