Slide film processed as negative

David Lyga · Jun 25, 2010

Being 60 I have seen a lot of changes. Decades ago I processed a slide film in color negative chemicals (inception of C-41) and got what I thought I would get: a clear base negative. Recently I did the same with EliteChrome and other positive films and was amazed to get an ORANGE base negative. Why and when was the changeover? When people stopped using slide projectors? I am assuming that if processed in E-6 the newer film would STILL have the orange base? Confused but delighted to be able to print slide film as normally as negative film. - David Lyga

srs5694 · Jun 25, 2010

AFAIK, all E-6 films have a clear base when processed in E-6 chemicals. Any color cast to the film when done in another process is therefore a result of the process and film interacting. I've done cross-processing in recent years, and I don't recall ever getting an orange base that closely matches that of most C-41 films; however, there may have been some tint to the bases. I just don't recall precisely, and I'd need to look up the rolls in question to be sure.

Domin · Jun 26, 2010

What I remember is that current and recently discontinued kodak sildes have more less orange base when cross processed while most fuji slides have clear base. Agfas I've used gave various colors. I remember some purple. I suppose that although all are to be processed in same E6 process the details of their technology vary.

I've never paid much attention to the base color. Some fuji's yielded quite different results when printed optically than scanned while for kodak and agfa minilab print shows more less what you can get from optical print. I'd have to dig through my xpro stack to say more.

keithwms · Jun 26, 2010

David, there is a c41 film with a clear base, it is called Rollei Digibase. (The name comes from the assertion that maskless films scan better)

willrea · Jun 26, 2010

keithwms said:
David, there is a c41 film with a clear base, it is called Rollei Digibase. (The name comes from the assertion that maskless films scan better)

I've been trying to find a source of this film in the US with no luck. Freestyle usually carries it but I got an email back from them saying their buyer has no ETA for it.

Domin · Jun 26, 2010

The maskless film is cut and repackaged agfa aerial film:
http://www.agfa.com/en/sp/solutions/aerialphotography/color/recording_films/index.jsp

From what I read for that particular application color fidelity is secondary to speed, sharpness and resolution and that's the reason the film is maskless.

Easier scanning seems to me as typical maco/rollei marketing bable. I do not scan myself so I do not know if there is some merit to that.

I don't understand though what is OP intention.

Slide film processed as negative

David Lyga

srs5694

Domin

keithwms

willrea

Domin

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