classcamera Posted May 2, 2003 Share Posted May 2, 2003 Hello All,<P> I have been interested in doing some b/w positive work for some time, however I cannot bring myself to pay the 50 dollars for the kodak kit. So, I was wondering if any of you chemistry nerds (like myself) would have the formula for the T-Max kit. If I can't get the T-Max kit formula, I would be happy to settle for a good formula for re- exposure b/w positives. <P> Thanks a bunch,<P> Mark Link to comment Share on other sites More sharing options...
frank.schifano Posted May 2, 2003 Share Posted May 2, 2003 Follow this link to Ilford's website and download this pdf file. The document describes a reversal process which calls for one of Ilford's off the shelf paper developers and a few other chemicals You can substitute Kodak's Dektol for Ilford's Bromophen or PQ Universal. Should be a lot cheaper than the Kodak kit. http://www.ilford.com/html/us_english/pdf/reversalproc.pdf Link to comment Share on other sites More sharing options...
andy_piper2 Posted May 2, 2003 Share Posted May 2, 2003 http://lavender.fortunecity.com/lavender/569/negtoposdeveloper.html Note that this is a formula for motion picture films - but silver film is silver film. I believe the TMax kit bleach uses potassium permanganate instead of dichromate. Other than that I haven't a clue as to formulas. The Kodak kit softens the film emulsion extremely during processing - to the point where it'll rub off on your fingertips. So handle the film extra-carefully while wet, regardless of which formulas you finally use, just to be safe. Link to comment Share on other sites More sharing options...
andy_piper2 Posted May 2, 2003 Share Posted May 2, 2003 Hmmm...clarifications: "I believe the TMax kit bleach uses potassium permanganate instead of dichromate." Well, at least the TMax bleach is purple while dichromate solutions are usually dark red-orange. Seems like I saw permanganate on the Kodak ingredients safety list as well, but it's been a couple of years. "The Kodak kit softens the film emulsion extremely during processing..." Having read the ingredients explains this - they include sodium hydroxide and sulfuric acid - i.e., Drano� and battery acid. No wonder the poor film gets squishy. Link to comment Share on other sites More sharing options...
barry_books Posted May 3, 2003 Share Posted May 3, 2003 The process above will work fine. I've used it on Tmax 100 as well as movie film. Tmax is nice because the base is pretty clear. I've also just used Tmax developer or Rodial for both developer steps. The only stuff that's tricky to find is the bleach but the usual Internet photo chemical suppliers have all the stuff. <P> The process is pretty easy, the only critical thing is the first development. I would wear gloves and don't drink the bleach but other than that is just about like developing negatives. If you already have a favortite developer I'd just try it and see how it works. Link to comment Share on other sites More sharing options...
classcamera Posted May 3, 2003 Author Share Posted May 3, 2003 Thanks for the fine responces, <P> I will give the Illford system a try. <P> Mark Link to comment Share on other sites More sharing options...
aaron_rocky Posted June 24, 2003 Share Posted June 24, 2003 http://www.frii.com/~jkbl/reversal/kodak.html Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now