On Mon, 30 May 2005 16:49:50 -0400, Alan Browne
wrote:

DoN. Nichols wrote:



I seem to remember a special three-layer B&W film from perhaps
the late 1960s or early 1970s. I have never used it, but I read the
reviews of it with great interest.

Each layer was a different ISO, and by selective color
filtration in the enlarger, you could select the layer which had what
you wanted.

IIRC, the review showed a shot of a clear glass light bulb, in
operation, and from one layer, you could get the image of the glass
envelope (with the filament vastly over-exposed), while from another,
you could get an image which showed detail of the glowing filament.

But, granted, this is an extreme example, and as far as I know,
the film had a very short life in the market -- just too special
purpose. :-)

I love trivia like that. People tried to achieve new things in smart
ways. Like you say, a little too special for a market that demands fast
access to the film and reasonable turnaround. That film seems to have
required too much post processing to be any fun to use.

Cheers,
Alan.

Ilford XP1 = garbage. It had supressed grain but was so finicky when
it came to contrast it wasn't worth using.
-Rich