As I said, Wolfgang Moersch had the same problem, with HP5+ and Delta 3200.
Well get him to send his back as well and we will check it out.....what more can I do !
Simon ILFORD photo / HARMAN technology Limited :
I'll definitely will! I thought he had already be in touch with you.
The same problem happened to Jean-Claude Dal Cin, from Adaflex, and during a workshop: rather embarrassing for him.
Philippe you stated "lots of black spots in the highlights!... Wolfgang thought it was because of the high alkalinity of Tanol (pH10,5 I think)" perhaps you should wait and see what Ilford say after they've looked at the negatives.
It's extremely rare to get coating problems with modern films, over the past 40 years I've only ever seen 2 or 3 negatives where there was a coating problem, and that was with Adox film, and pin-holes. But it is quite well known that with some very alkali developers the shock of plunging negatives into stop-bath can cause these problems, I had this happen once back in the 70's. It affected the whole film, but as that came from a bulk reel of FP4 and no other films from the same 100" roll were affected it was quite obviously a processing problem.
Tanol may well have tanning effects but a high pH softens the emulsion quite significantly. It is often recommenced that you soak a print that's been fixed with a hardening fixer in a strong Carbonate solution specifically to soften the emulsion before toning, that's the effects of a high pH.
So it may not be the film, it could well be the developer, particularly as you say Wolfgang had it happen to two entirely different types of film.
Last edited by Ian Grant; 06-05-2008 at 02:02 PM. Click to view previous post history.
Sorry, but this also happened to a friend using D23, which is not known for its high alkalinity -
The problem with Adox/Efke films is caused by a too acid stop bath, but at least it's said in the Fotoimpex catalogue (German version, I don't have the English one).
By the way, I noticed coating problems on 120 Delta 400 some years ago... and Michel Beaumont (Ilford France, at the time) never wanted to believe me, till I sacrified an unexposed film and looked at it through the light: the poor coating was visible!... This time I contacted Ilford again, and talked to a Monsieur Escoffier. When he asked the kind of soup I used, and I said "pyro", he asked me what that is!
I accept to take the risk of using "exotic" films (the late Forte, Foma, Efke, Rollei, Maco and so on) because I like sometimes the results, I know that it is sometimes risky and don't use them for professional jobs. BUT THEN I PAY HALF THE PRICE!!!
I simply think I won't buy Ilford anymore: it's especially enerving when you shoot 4x5 and 8x10, which was the case!
PS: forgive my rusty English.
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Originally Posted by Philippe Grunchec
I can understand your frustration but surely you have to give Ilford the opportunity to examine the fault before making the decision not to use their film again. I can assure you that they are always strictly honest and if they find that the problem was in the manufacture of the film they will hold their hands up and admit it.
Thanks for your reply Simon. I don't think there is much need for sending the film to Ilford. I, for one, am pretty sure that there is nothing wrong with the film, but my storage/processing needs improving. Actually that was the reason for posing my question. Could you indicate what the manufacturing tolerances are and what base + fog you would expect from well stored and well processed HP5? I would like to know what i should be aiming for. On the processing side, I have been using and reussing 1 liter of fix 1:4 for 4 minutes. This liter of fix has been used for no more than 10 filmes but over a period of several months with some highes room temperatures (24 C) in my darkroom this summer. Is this a likely reason for a highish b+f in your opinion?
Originally Posted by Simon R Galley
On a side note, thanks for showing this level of customer support. It is a major factor in my resolution to keep using Ilford films as long as you lot keep making them.