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

[Daniel Unkefer]

Makiflex 150 F2.8 Auto Xenotar MINR Mammo by Nokton48, on Flickr

Foxglove on the back deck. Plaubel Makiflex with 150mm F2.8 Schneider Auto iris Xenotar lens wide open. 4X Neutral density filter added. Kodak MINR Mammography Film 18x24cm, cut down into four 9x12cm's. Microdol-X Legacy Developer 12 minutes at 74F. Aristo #2 RC 8x10 print, Omega DII laser aligned 180mm black Rodagon, Dektol dev 1:2. Handheld which I have been doing with Makiflexes a bit.

[HT Finley]

This thread is the longest thread in internet history and I am lost for time to glean it for a few answers. I have a 7 or 8 year old box of Fuji HRT Green sensitive X ray fim and want to get busy on some basic experimentation. I know the perils of old flim, but for the moment I will put that aside. I will soon buy a fresh box if need be. I've affixed a Hoya K2 yellow filter to my lens. I need an ballpark ASA rating to start with filter factor already figured in, as the filter will remain there permanently, and a basic starting development time, temperature, and dilution with Adox Rodinal. Tray development. This is 8x10 format. Thank you.

[Corran]

EI 50 6 minutes at 68F 1:100 Rodinal

[HT Finley]

Thank you. I will start with that. I assume the EI 50 already takes into account the filter factor. I appreciate it.

[Tin Can]

No

But time of day, month etc

Thank you. I will start with that. I assume the EI 50 already takes into account the filter factor. I appreciate it.

[Bob Wagner]

Here is what I use:
D23 1+2 (Mixed from powder stock chems) 68 deg F
7 min 30 sec normal, for N+1 underexpose 1 stop, develop for 8 minutes
Open tray with plexiglass with smoothed edges in tray bottom, continuous but gentle tray agitation first 1 min 30sec. Thereafter: rock tray slightly 3 times once per minute
Be very wary of safelights, I have one specifically made for X ray film and still have to keep it over 4 feet away and pointed away from the area. I cover the tray whenever possible, and even have to be aware of illumination for the sides
Limited experience with yellow filter, not found a need to change exposure

[Bob Wagner]

Forgot to mention, I have had good results from Rodinal as well, I just don't have any and use D23 chem for other things anyway so have it on hand

[Corran]

No

But time of day, month etc

This, but experiment.

[Tin Can]

X-Ray people please see TIN Type Zebras above as he has posted charts like of olde


Here

https://www.largeformatphotography.i...Zebra-Tin-Type

[HT Finley]

I thought I'd report back with preliminary results from today, based on just 2 sheets of film. This is not conclusive, obviously. I was an on-and-off stormy day. Nice puffy clouds and blue sky alternating to storm overcast and rain, back and forth all day. I wanted some blue sky and puffy summer clouds, so I had to jump in from minute to minute. This is Fuji HRT, 8 years old, with a Hoya K2 yellow filter permanently fastened to the rear element of my Bausch and Lomb 12 inch lens in a Betax #4 shutter. First sheet exposed at ASA 25 and developed 5 minutes, 75 degrees in Rodinal 3ml to 10 ounce water. Results: printable, but not perfect. The second ASA 12 same developer and dilution 4 minutes, 75F. On the second, the film showed more printable sky, but a bit lacking in the shadows. More tests are needed. At this time, I believe ASA 12 and 4 1/2 minutes 75F looks like a good place. I was particularly pleased overall. I don't feel so constrained by the constant fight to win over the well-known high contrast battle in using X ray film.