I'm a student so please forgive me if this sounds ignorant. I noticed that on the inside of Kodak TMAX 100 film boxes, there is a short line mentioning "reversal processing". What is that? How can we do that?

-- Low Chee Lie (inferno@pacific.net.sg), July 12, 2001

Answers

Reversal Processing is the process required to obtain slides from a film. The basic steps are: 1) development with a strong developer (e.g. paper developer)with some silver solvent (e.g. rhodanid) 2) bleaching the developed silver with Chromium (VI) Oxide 3) clearing, removing the residues of the bleach 4) reversal exposure to a strong light source - OR - chemical reversal 5) development with a strong developer 6) fixing

Washing between each step, takes about 1 hour total. Kodak and tetenal (Germany) both sell chemical kits for reversal, the price per film is roughly 3 Pfunds Sterling.

Save your time and effort and use Agfa Scala and the commercial Scala process.

For more information look at the Kodak site.

-- Wolfram Kollig (kollig@ipfdd.de), July 12, 2001.

Yes Kodak makes a kit and I have used it extensively in the past. Don't know much about the Tetenal that Wolf speaks of. The slides are beautiful. Rate your TMX at ASA50 and the Kodak is a 6 step process. A bit time consuming and a tad expensive but the results are nice. Cheers

-- Scott Walton (f64sw@hotmail.com), July 12, 2001.

Hello Scott,

what kind of bleach is Kodak using? The old Tetenal Kit used Chromoxid, the new one permanganate, which seems to be more of a mess. By replenishing the bleach I reduce the enviromental hazards. (Finally the bleach will be cut with alcohol to reduce remaining Cr VI to Cr III which then will be taken by disposal service as "heavy metals".)

Regards,

Wolfram

-- Wolfram Kollig (kollig@ipfdd.de), July 13, 2001.

I think it is permanganate also if they haven't changed it recently. They have changed their C-41 and RA's so I couldn't tell you. Sorry. Cheers

-- Scott Walton (f64sw@hotmail.com), July 13, 2001.