Does Negative + Negative = Postive?

[Ektagraphic]

Hi Guys- It seems to me that in theory I could take a negative and expose it to another sheet of negative film. Would this create a positive? I know it may not be a great image (or would it be?). Am I nuts??

Thanks,

Patrick

[David William White]

not nuts, done all the time

[Ektagraphic]

Don't the movies do something like this? I'd probably like to try it with 4X5...I guess it would be simple for me to try black and white but color neg would be really cool.

[tiberiustibz]

Paper is merely another negative. It's the same thing, but the film is much faster and takes much longer to develop. You can acquire litho film which processes in normal paper chemistry or you can reversal process negatives to achieve the same effect.

[Ektagraphic]

If people still want transparencies and E-6 disappears, is this a way they could get them?

[wy2l]

If people still want transparencies and E-6 disappears, is this a way they could get them?

www.dr5.com

[Ian Grant]

If people still want transparencies and E-6 disappears, is this a way they could get them?

It's always been a commercial option, particularly when volumes of prints were required.

Any Pro lab usually offers the service.

Ian

[Ektagraphic]

I have never seen it offered....I'll take a look around. What do they call it?

[Ian Grant]

Duping

It can be onto negative or positive stock.

Ian

[jnanian]

there is a film still being made ( i think photo warehouse in oxnard california is the last to carry it ) ... duplicating film.

this emulsion is SLOW like asa 1 or less, and need a flood light to expose, or a really long exposure under an enlarger or projected onto ....
it duplicates what is being projected onto it in a single step ...
meaning if you project / contact a negative it ends up a negative, or
if you project / contact a positive / chrome it ends up a positive.

there have been threads here ( and elsewhere ) about this stuff ...
kodak called it SO-132 professional duplicating film, i think PW just calls
it duplicating film.