ADOX CHM125 / 400 overlaid - how to process?

roseblood11 · 2010-08-19T09:29:46+00:00

Hallo, Danke für die Antworten, klingt ja beruhigend. Aus dem letzten Satz schließe ich, dass es ganz sinnvoll wäre, die Filme leicht überzubelichten?...

roseblood11

Hello, I’ve taken on a large quantity of ADOX CHM 125 and CHM 400 from a friend; the best-before dates on the 125s expired three years ago and on the 400s a year ago. The films were stored in a warm place (a living room cupboard), and it seems many of the tins had already been opened. - How should/must this be taken into account during exposure and development? (What is actually the best all-purpose developer for these types? I’ve never developed them myself...) - Should I expect a noticeable loss of quality? - How should I store the films from now on? It’ll take me at least a year to get through this pile... I reckon that as the canisters may have been opened and could now contain moisture, freezing them wouldn’t be such a good idea, would it? The fridge? Kind regards, Immo

Urnes

Hello, I’ve taken on a large quantity of ADOX CHM 125 and CHM 400 from a friend; the best-before dates on the 125s expired three years ago and on the 400s a year ago. The films were stored in a warm place (a living room cupboard), and many of the tins appear to have been opened before. - How should/must this be taken into account during exposure and development? (What is actually the best all-purpose developer for these types? I’ve never developed them myself...) - Should I expect a noticeable loss of quality? - How should I store the films from now on? It’ll take me at least a year to get through this pile... I reckon, as the canisters may have been opened and could now contain moisture, freezing them wouldn’t be such a good idea, would it? The fridge? Best regards, Immo

Hi Immo, I’d say three years isn’t too bad. If it’s a large quantity, just take a 125 and a 400, take a few shots, develop the films according to the standard instructions and see if there’s any loss of quality. I don’t think so. The CHMs are Ilford FP4 and HP5 (?!), and standard developers like Ilford ID-11 are pretty forgiving. For further storage, just freeze them. Even with films in their original packaging, condensation can form when you defrost them, so just wait a day until they’ve acclimatised. Regards, Sven.

mdeutgen

Hello, I’ve taken on a large quantity of ADOX CHM 125 and CHM 400 from a friend; the best-before dates on the 125s expired three years ago and on the 400s a year ago. The films were stored in a warm place (a living room cupboard), and many of the tins appear to have been opened before. - How should/must this be taken into account during exposure and development? (What is actually the best all-purpose developer for these types? I’ve never developed them myself...) - Should I expect a noticeable loss of quality? - How should I store the films from now on? It’ll take me at least a year to get through this pile... I reckon, as the canisters may have been open and could now contain moisture, freezing them wouldn’t be such a good idea, would it? The fridge? Best regards, Immo

Immo, that all sounds less serious than I thought. First of all, you should test your films with a developer. I also recommend D76 (which is almost identical in composition to ID11), with a dilution ratio of 1+1. You’ll need to work out the correct development time for your specific workflow anyway, and then there should be nothing to stop you using up the films. It’s hard for me to estimate your quantity, as the term ‘large quantity’ can vary between 10 and 1000 depending on the user. I would store the films in the fridge (provided there’s enough space) or in the cellar. I’d definitely give the films another year. If in doubt, the base fog will increase and the speed will decrease. But as you have to test them anyway, this error can be corrected. Martin Edith has found two typos!

roseblood11

Hello, Thanks for the replies – that’s reassuring to hear. From the last sentence, I gather it would make sense to slightly increase the exposure for the films? Kind regards, Immo

mdeutgen

Hello, Thanks for the replies – that’s reassuring. From the last sentence, I gather it would make sense to slightly increase the level of overexposure for the film? Best regards, Immo

I generally do that; I expose the FP4+ at 100 ISO, and although I set the HP5+ to 400 ISO, I expose it half a stop more. Martin