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

[Tin Can]

Very cool!

Many thanks to all for the advice. The problem was solved - more active agitation.Attachment 186218 This is an image I received today. kodak green 18*24

[Sergei]

Very cool!

Thanks

[Neil Purling]

Has anyone here used Foma Indux R4? It is intended for NDT use in industry & I know nothing beyond what is on the Foma site.
I have no idea of the sensitivity or the speed when developed to give pictorial contrast. From the comparison chart I guess the speed to be somewhere between 50 and 125 ASA. As for the colour sensitivity........... It could be blue sensitive only. From the Foma information they suggest use of a yellow safelight.
I am waiting on some Rodinal to arrive as well as a sample of the film.
I don't mind if the effective speed turned out very low in order to get pictorial contrast. I have used Eastman copy film and print stock that were 12 and 3 ASA respectively.

[Neil Purling]

OK. So I have received the film. It is in vacuum-sealed daylight packets sandwiched between two sheets of lead foil.
I am assuming that the film is coated on both sides, because I can't tell any difference between the two sides, except there is an impressed 'FOMA R4' on one side.
I have put four sheets in holders. No idea when I will get a good enough day to shoot them.

I will do them with Rodinal for 6 min diluted 1:100, like my other X-ray film.

[Tin Can]

I looked it up and only found what you found.

I'm sure it will work.

[Neil Purling]

In the scene I was using as a test it was a garden on a cloudy day with the corner of a brick building with a white door frame. I don't think either film has any red sensitivity, so that brick is going to be lacking in detail.Well.....

First test of the Indux R4 was rated 50ASA. I developed in Rodinal 1:100 for 9 min. Barely anything in the shadows.
Some Crontek 4x4 single-sided is OK at that timing, but not exactly snappy.
The Crontek is 25 ASA if developed for 9 min in Rodinal 1:100.
I next gave a mixed tank 6 min with Rodinal diluted 1:50. The Crontek looks better.
The Foma R4 was my main focus of interest, but at least I know what speed it isn't

I have loads of the Foma R4. My next test will be 6 min in Rodinal dil 1:50 with sheets rated at 12 and 25 ASA.
Just for interest i'll do a shot on the Crontek at 50 & 25ASA.
This I will achieve by drawing the slide half way, tripping the shutter. Then I pull it right out and fire the shutter again.
It will waste less film that way, which I really ought to have done today.

[Tin Can]

Neil,

I don't think any X-Ray film is red sensitive. All my variations are marked..... oddly now that I look.

This is 2016 expiry Kodak which has confusing symbols.

Carestream aka KODAK Ektascan 8X10 2016 by TIN CAN COLLEGE, on Flickr

[andrewch59]

Hot Rod show was on again last weekend, this is one of four taken.
4x5 green agfa, adonal 1:100 rotary 10mins, prinzedorff 4x5

[Tin Can]

Really like!

Love fall off on the left.


Too bad the other Tin Can on the right is there.

A problem at show off events for photography

[andrewch59]

Thanks Randy, some deliberate vignetting to highlight the subject. Hopefully some commissions may come my way next year