I saw that, but Im not sure if he is referring to the 100 and 400 film or the way to expose them... I think youd need an extra stop. The folks in this thread followed the recipe:
https://www.photrio.com/forum/threa...mulary-reversal-kit-and-tmax-400-tmy-2.74132/
But are giving it more light.
I dont know though. And you might have a point Raghu... would you shorten the first developer time if using thiocyanate instead of thiosulfate? Maybe its better to use thiosulfate... but avoiding fogging and loss of shadow density is something Id like to do.
Thank you Raghu for the link! Appreciated!
Yesterday I did take look at my old literature (German ORWO, USSR and Yugoslavian) and nobody even mention thiosulphate in first developer. All recipes but one is talking about using thiocyanate. One is omitting silver solvent at all.
With out numerous test clips I will never attempt to do BW reversal. When I did my processing with home brew ORWO #829 developer with out thiocyanate and EFKE KB17 film (box speed 40iso), under tungsten light, I ended up with EI of 100 or 125.
I
As @Lachlan Young said earlier, if you are using permanganate bleach (Ilford recommends it in that pamphlet), you really don't want any cyanide in the bleach, so avoiding thiocyanate makes sense.
Isn't HCN is formed even when peroxide bleach reacts with thiocyanate?
Due to some recently incorporated changes you probably can't send private messages until your post count increases. The changes are there to deal with a problem with new members who join to scam others.Slightly off topic but how do I send private messages?! I even have some conversations Ive started but I have no clue how I did that.
Thanks Matt. Raghu or gorbas, could either of you send me that Haist pdf?
I’ll post here as soon as Ive developed.I'm a bit late to this thread but I tried to reverse a Tmax400 @ 3200 in Microphen and the end result was as expected: very dark (film leader and also border markings are quite dark). This reversal method worked great for Rollei Superpan 200 and Fomapan 400, but it seems like Tmax definitely needed a silver solvent in the first developer. I would be interested to see if you manage to find a working percentage for this particular film.
I'm a bit late to this thread but I tried to reverse a Tmax400 @ 3200 in Microphen and the end result was as expected: very dark (film leader and also border markings are quite dark). This reversal method worked great for Rollei Superpan 200 and Fomapan 400, but it seems like Tmax definitely needed a silver solvent in the first developer. I would be interested to see if you manage to find a working percentage for this particular film.
Is there any example images of reversed TMax400 on a lightbox? I'm just curious because I couldn't find any online. The reversal process I tried resulted in the film leader to be very dark/gray, even the border markings are quite dark. I'm wondering if it's necessary to add a silver solvent since I read somewhere that TMax400 has some silver halides deep within the emulsion that's hard to be bleached.Or a development accelerator in a much more active first developer - an EI of 800 on TMax 400 is achievable in the Agfa Scala process.
Is there any example images of reversed TMax400 on a lightbox? I'm just curious because I couldn't find any online. The reversal process I tried resulted in the film leader to be very dark/gray, even the border markings are quite dark. I'm wondering if it's necessary to add a silver solvent since I read somewhere that TMax400 has some silver halides deep within the emulsion that's hard to be bleached.
I understand 120 format has a film clear base, which isn't true for 35mm (except specific ones like Rollei, etc). That's why I'm curious on how 35mm reversed BW film look to the naked eye. I feel like that's the best way to judge this reversal process without a densitometer as scanned photos are either auto white balanced or level corrected.I've got Delta 400 in 120, run in the Agfa Scala process (which as far as I know uses PEG 1500 as the accelerator, but no additional KSCN or similar solvents - although the patent that discloses this also refers to novel inventions in first developers using HQMS-K, KSCN and PEG 400) - no TMax immediately to hand.
I understand 120 format has a film clear base, which isn't true for 35mm (except specific ones like Rollei, etc). That's why I'm curious on how 35mm reversed BW film look to the naked eye. I feel like that's the best way to judge this reversal process without a densitometer as scanned photos are either auto white balanced or level corrected.
This what DR5 says about TMax 400:
" Do not shoot this film at its factory speed for dr5! The quality is substandard at iso higher than 200. The normal iso for this film in dr5 is 125iso. TMAX400 can not be run at 400."
DR5 doesn't use halide solvent.
I recall reading that Kodak D11 was what Mr Wood claimed was a good choice for reversal FD. It has 75 g/l of sulphite which is not far off that of many developers that would be considered mildly 'solvent'.
Interesting, looks like it's not that far off D-72 1:2 which is what a lot of people have used. https://www.photrio.com/forum/threads/kodak-d-11-developer.10327/#post-139101
D-11 looks like it has more hydroquinone, so I guess it has even higher contrast.
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