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

[Eugen Mezei]

Can it be pressure?

[Kino]

Well, I pulled a sheet from the middle and the back of the pack and I cannot see this defect.

I did, however, discover that the small, red AC safelights sold on Ebay are NOT safe with Fuji HR-U Xray film. I did a 1 through 10 minute wedge with the film on my enlarger baseboard, about 5 feet away with the light reflected. There is practically no difference between the steps, but the ruler I laid over one edge was perfectly clear.

I am not saying these don't work for other applications, but be aware of my experience if you are thinking of using them for X-ray film.

https://www.ebay.com/itm/235241444895

[Kino]

Can it be pressure?

I am beginning to suspect my film holders. Will be testing those.

That's the problem trying to resurect a 100+ year old camera; everything is suspect...

[James R. Kyle]

Well, I pulled a sheet from the middle and the back of the pack and I cannot see this defect.

I did, however, discover that the small, red AC safelights sold on Ebay are NOT safe with Fuji HR-U Xray film. I did a 1 through 10 minute wedge with the film on my enlarger baseboard, about 5 feet away with the light reflected. There is practically no difference between the steps, but the ruler I laid over one edge was perfectly clear.

I am not saying these don't work for other applications, but be aware of my experience if you are thinking of using them for X-ray film.

https://www.ebay.com/itm/235241444895

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I have great success with what is called a LED "Neon Rope strip".
I left a sheet of paper out for 30 minutes = Then developed it. It came out WHITE. I did the same with Fuji HR-U. It was the came = Nothing.
I have been using this safe lighting system for three years now.
Here is the Amazon link for what I use. (I do not know about the other LED lights = I Know this works.:

https://www.amazon.com/Maxlaxer-Wate...1zcF9tdGY&th=1

[James R. Kyle]

Here is what I am using for the development of X-ray (Fuji HR-U) film.
It is my reformula of Ansco-30 = For TANK DEVELOPMENT.

--
Here is the Ansco-30-JK reformulated “Tank Developer Solution”.

Water - at 120 Degrees F. -------------------750ml.
Metol --------------------------------------------------------- 3.0 Grams. (Reduced)
Sodium Sulfite ----------------------------------------- 70.0 G. (Increased)
Hydroquinone ------------------------------------------- 4.0 G. (Reduced)
Sodium Carbonate ------------------------------------ 20.0 G. (Reduced)
Potassium Bromide ------------------------------------- 5.5 G. (Increased)
Cold water to make a Full 1 liter of Solution. (STOCK solution.)

For a working solution --
Take One Part of this Stock to 24 Parts of Water. That is a 1:25 Ratio. (i.e.= 1 Oz. stock to 24 Oz. Water)
The times will vary with the temperature of the working solution, anywhere from four to seven minutes.
(20 Degrees C. = 6 minutes)
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[Eugen Mezei]

Regarding pressure, how you store your film? On the boxes is imprinted, that no pressure should be applied to them. Now guess why I suspect your problem could be pressure: My mother always places things in the fridge onto my boxes of film, although I told her thousands of times not to.

[Eugen Mezei]

Here is what I am using for the development of X-ray (Fuji HR-U) film.

Here is the Ansco-30-JK reformulated “Tank Developer Solution”.

Take One Part of this Stock to 24 Parts of Water. That is a 1:25 Ratio. (i.e.= 1 Oz. stock to 24 Oz. Water)

What is meant by tank? Tanks for roll films or dip and dunk tanks?

Is that not rather a 1+24 ratio?

[Kino]

Thanks James for the neon rope link; that looks ideal.

A bit scattered at the moment, but will pull it together soon.

Too many irons in the fire at the moment...

[Kino]

Regarding pressure, how you store your film? On the boxes is imprinted, that no pressure should be applied to them. Now guess why I suspect your problem could be pressure: My mother always places things in the fridge onto my boxes of film, although I told her thousands of times not to.

Upright on a shelf in the darkroom; not refrigerated yet. Just got the film last week and don't want to refrigerate the box I am working with at the moment. The other is most certainly not stacked under anything in the fridge.

Like I said before, I am under the growing conviction it is my ancient film holders leaking light.

These things take time to sort out, but thanks for the ongoing input.

[James R. Kyle]

What is meant by tank? Tanks for roll films or dip and dunk tanks?

Is that not rather a 1+24 ratio?

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Ok... Whatever.