Fomapan 400 H+D Curve with Replenished XTOL for 8:45 at 24C in a JOBO

[Adrian Bacon]

Adrian Bacon submitted a new resource:

Fomapan 400 H+D Curve with Replenished XTOL for 8:45 at 24C in a JOBO - A development time resource for replenished XTOL and Fomapan 400

For reference, and if anybody wants to discuss. I'm including these times for Fomapan 400 because Kodak does not list times for Fomapan 400 in their J-109.

I've made these exposures as carefully as I could and eliminated as many variables as I realistically could. While it is not scientific, and certainly not up to ISO or probably manufacturer standards, it is as accurate as I can make it with what I have available to me, and certainly accurate enough that I thought it would be...

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[138S]

Let me add my interpretation of this graph.

> The Box Speed rating, as seen in the datasheet, is not made with ISO standard conditions, while this film can be used at some higher than 160 speed, if using a "regular" development then our start point should be that ISO 160 found by this calibration.

> This film, with this close to "ISO standard" processing, shows a nice shoulder by +4 overexposure, this is not good or bad, but we should understand how it works. We may take advantage from that soulder to obtain nicely printable highlights, or we may get a pitfall if plainly overexposing to record well the shadows and not underdeveloping N- later. We should understand pros-cons of linear vs shouldered films...

> That shoulder will be different depending on processing, with some N- processing we would have a more linear latitude, with perhaps 1/3 stop speed loss.