Old Ilford Data Sheets?

[bvy]

Does anyone know if Ilford keeps older versions of their data sheets archived online anywhere? I'm looking for an older version of the Perceptol datasheet -- the current one is dated 2010. Thanks.

 

[pentaxuser]

Does anyone know if Ilford keeps older versions of their data sheets archived online anywhere? I'm looking for an older version of the Perceptol datasheet -- the current one is dated 2010. Thanks.

Just the sort of question that Mr S Galley would have picked up tomorrow on return to work after the weekend and given help on within a couple of days assuming the information wasn't commercially protected. Alas that kind of Harman service has gone forever, I fear.

I hope you find an answer

pentaxuser

 

[Chris Livsey]

http://photoweb.ru/exusr/pdf/ilford/film_chem.pdf

Has data from 1995.
Out of curiosity why? Do you think something has changed?

Over the years the formula has varied: The 1995 Perceptol MSDS cited sodium chloride and the 2002 MSDS cited sodium bromide I understand current production is back with sodium chloride.

 

[MattKing]

Why don't you ask the newly introduced (here on APUG) members of the Ilford technical support team?

 

[bvy]

http://photoweb.ru/exusr/pdf/ilford/film_chem.pdf

Has data from 1995.
Out of curiosity why? Do you think something has changed?

Thank you. That's just what I was looking for. All I wanted was times for the older formulation of T-Max 400. Maybe I'm splitting hairs, but I was looking for a baseline.


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[Photo Engineer]

Search "wayback". The actual web site has archives of major web sites over a period of years.

PE

 

[Chris Livsey]

Thank you. That's just what I was looking for. All I wanted was times for the older formulation of T-Max 400. Maybe I'm splitting hairs, but I was looking for a baseline.
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I see, but I suspect some speed loss will have occurred as I'm sure you realise. I presume a touch of Benzotriazole will still help with any age related fogging despite the T- grain nature, it will be interesting. Perhaps you xan come back to us with results?

 

[bvy]

I see, but I suspect some speed loss will have occurred as I'm sure you realise. I presume a touch of Benzotriazole will still help with any age related fogging despite the T- grain nature, it will be interesting. Perhaps you xan come back to us with results?

Definitely some speed loss. This is T-Max 400 4x5 expired in 2004 or so, and always kept frozen. The recommended time for T-Max 400 according to the old Perceptol data sheet, was 12.5 minutes. I shot it at 100 and developed it in Perceptol 1+1 for 10 minutes, and a second sheet I developed for 11 minutes. The decreased time is to compensate for constant agitation in the rotary drum I'm using. Even so, I can't get the blacks (i.e. strong highlights) I'm getting with HC-110 -- and that's shot at 200. Everything is at 20C/68F. I am getting good contrast in the shadows from the Perceptol, however.