Use of X-ray film: technical discussion with example images

And here is one with 30m(inutes :P) m same dilution and process. I think i am sticking with 30m for now, moving up from 12. General feeling is better.

https://farm4.staticflickr.com/3932/...719366c3_c.jpgScan-141002-0003www by Sergei Rodionov, on Flickr

Very nice. Scene gives me ideas. Process also interesting.

Thanks

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Originally Posted by SergeiR

Decided to dork around with development time again. For my normal quantities it looks like around 7 minutes rotary will give you somewhat clear pour out developer. After 7 it starts to break down and it becomes blueish gray .. So i figured - what the hell. Lets go back a bit to even longer periods (i used to do up to 1hr with Arista film in similar dillutions).

Here is 35m rotary with 1:225 dilution pf Adonal (i had to run to the shop, to pick up bread for kid ;))



Very very delicate tones in highlights. I thought i blew them up , judging negative alone, but proven to be wrong. (oh come on.. 15s exposure that i counted in missisipies ;)) So i think i am going to be back to longer times for scenes with higher range.

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Originally Posted by Randy Moe

Very nice. Scene gives me ideas. Process also interesting.

Thanks

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Yeah, i got this doll for some collodion series, but ended up never starting it (was too hot here for 2 last months) :) Now that it cooling down i can start after all

Oh and after 30-35 minutes developer looks like REALLY dirty water ;) and, what is interesting, fixer doesn't become as yellowish as with 12 minutes or less.

The very first test picture, it's not bad, but in the future some little problem i will hope be solved.
Film: XOE Retina (iso400), Rodinal 1+50, dev.: 7sec, in tank, rotated with my hand.
Attachment 122760

I wonder if anyone has any idea why xray films clear so quickly in the fix? Given their extra density, that's the last thing I would expect.

They also seem to dry quickly.

As a semi-educated guess, the double emulsion films use a grain technology appropriate for a single emulsion at half the speed (because the double layer gives roughly twice the density for a given exposure), or about ISO 50 for "full speed" material -- and in general, the slower the emulsion, the smaller the halide grains and the faster they'll clear in the fixer. Further, they're cubic grain rather than tabular; tabular grain takes 2-3 times as long to clear for a given speed. A half speed double coated x-ray film probably has grain size comparable to one of the faster printing papers, which will fully fix in two minutes in rapid fixer; even the full speed version ought to fix almost as quickly as Ilford Pan F or an ortho litho copy film (which typically fix about like enlarging paper).

Thanks.

Regular film can clear pretty quickly too, but we don't see it as that's not done under safelight conditions.

I turn on the lights as soon as the film (regular film) is in the fixer. TMX takes like 4-6 minutes to clear. Most others are a little less. But not nearly as fast as x-ray (instantaneously, pretty much).