Thank you for letting us know. We will review all the times for this combination and remove any errors later today.

The online time/temp calculator is here:

https://www.digitaltruth.com/devchart.php?doc=timetemp

If no time is listed, you need to run some tests. Other medium speed films develop between 3.5 to 7.5 minutes, so the time is likely to be within this range at 1+39, 20C.

The formula has now been updated in the online version and will be updated in the app at the next upgrade later this month.

Kenny,

You sent us a bunch of data which we added to the site and checked the veracity of with you, but now you say the data on our site is incorrect.

Can you please contact me by email and follow up on this so that I can be sure the data is accurate?

Thanks.

Hi, The time of 9 3/4 minutes is the official time published by Kodak for Tri-X 400 in D-76 1+1. This is a common combination used by many people over a long time, so it should be a very reliable starting point. You say that your film is underexposed. If that is the case, then it is your light meter...

The easiest way is to use pH indicator test strips or a test meter. Full information (including links to purchase third-party testing kits) can be found here: http://www.digitaltruth.com/products/ecopro_stop.php Alternatively, you can simply change it at the same time as the fixer, or at the end of ...

Always use regular tap water for any chemicals, including ECO PRO, unless distilled or deionized is specifically recommended.

A lot of manufacturers do list times for push processing, but Ornello is correct in stating that every film has an optimal speed at which it should be exposed to get the fullest tonal range and most accurate contrast. Some films have more latitude than others, allowing them to be exposed within a wi...

The 4 minute time is officially published by Ilford for Pan F+ in HC-110 for both 35mm and 120 roll film. Its possible that the developer concentrate is old and has lost activity, but its unlikely because HC-110 concentrate is pretty robust. The most likely causes are that it was mixed incorrectly, ...

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Hi Cameramill,

The translated link appears incomplete.Can you repost it?

FYI: The link that KennyE has provided will only show the full text of the book if it is accessed via google.com in the US. If you are accessing from another country then you may be limited to snippets of the text or no text due to local copyright laws.

I would recommend testing a roll at 5.5 minutes at 1+14, or if you need 1+9 then try your test at whatever time you currently use in F76+. The manufacturers don't publish a time for this combination, so you will need to run your own tests. Once you have determined the best time, please submit it to ...