Why don't you mix your own D-23?Quote:
Originally Posted by mohmadkhatab
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Why don't you mix your own D-23?Quote:
Originally Posted by mohmadkhatab
Quote:
Originally Posted by Philippe Grunchec
I have a lot of formula,
There is nothing wrong, (D23) is available and very inexpensive, but I do not see it as distinct at all. It is a very basic and ordinary formula. What do you like about that poor formula?
I love the formula (AGFA14) it is very soft and very gentle, and when I flip over violently, I get good contrast with unparalleled smoothness.
- But it is okay, I will listen to your advice, I do not reject expert advice no matter how objectionable,
I will listen to you and implement what you say, there is no problem.
But in reality, I have a very important question ,,
- Has anyone experimented with reversing the negative image to obtain positive transparency from X-ray films?
I hope to get an answer to this important question.
God bless you
Another somewhat trivial question:
- My friend has a wooden (5x7) camera.
There is a radiographer who wants to sell him (63) Sheet (10x12) cm. The question is ,, Can this measurement succeed in working on that camera?
http://www.astrum-ltd.com/ru/rentgenovskie-plenki.htmlQuote:
Originally Posted by dpaqu
Haven't tried it I think, but it should work just like with any other film.Quote:
Originally Posted by mohmadkhatab
He'll need a reducing back for his camera and appropriate film holders. With a bit of luck, the film will fit in 4x5" holders and a 4x5" reducing back can be used, but it depends on the exact dimensions of the film. Also, getting hold of a reducing back for the camera may be challenging. It's probably easier to get some larger format film and cut it down to 5x7". But of course that depends on the availability of film where your friend lives.Quote:
- My friend has a wooden (5x7) camera.
There is a radiographer who wants to sell him (63) Sheet (10x12) cm. The question is ,, Can this measurement succeed in working on that camera?
A long time ago I played around with enlarging 35mm negatives onto x-ray film, to make an internegative (positive). Then I would contact print that onto another sheet to make the negative. Intention was larger negatives for contact printing (alt processes).
I was using double-sided film which hopelessly blurred the image after the two intermediaries. I didn't have enough success to bother fine-tuning exposure/development/density tests. And, as a positive medium, the x-ray film's blue base was unappealing.
Perhaps better results would be obtainable with single-sided, but either way I didn't try anything more. But it's cheap, so try it out if you want.
[QUOTE=koraks;1545866]Haven't tried it I think, but it should work just like with any other film.
God bless you, my friend ,,
Thank you very much ,,
But in your opinion, what is the available x-ray film size that fits the (5x7) camera? From your point of view?
And will this camera accept that this 4x5 film stand be installed assuming that we will find it individually one way or another depending on luck or the like?
- Regarding my question about converting the X-ray film to positive transparency, I mean that is done directly.
I do not mean to reprint an image from (35mm) film to an x-ray film in order to have positive transparency.
No, that's not what I meant.
I have been using AGFAscala since the beginning of the X-ray film development.
The file is well known and known to everyone and I think that most professors and experts in this forum know it and they have inevitably gone through that experience before (35mm) or (120mm) films, but I wanted to think about the idea that this process be applied to X-ray films, , why not ?
- The file with attachments, and of course the photographic researcher designed this process on the basis of identification with the original process (AGFAscala)Attachment 202365, but with great regret, he erred in that he designed everything on the basis that it is intended to work on a machine (JOBO) only, and with a capacity (260 ml) Only ml.
Therefore, if you want to prepare one liter, you will fall into the trap of complicated calculations that I failed to calculate, because if you prepare 4 packages, each one is a capacity of (260 ml), and you add them in one container, then the result will become an increase in the concentrations of chemical elements by 300% of the original process design, so I am very confused in this regard.
The problem I see with doing reversal is that the film base is not clear, its blue. So if the goal is to show the positive as the final image, it's not a B&W picture, but a mostly blue picture.
What is the end goal of the positive?
I'm just putting this here for reference purposes...
B/W reversal process for many film sizes, including 5x7.
dr5.us
What is the problem in blue?Quote:
Originally Posted by blue4130
The blue color is a very beautiful color - I don't see any objection to the blue color dominating the scene - why not?
It is basically a mono image - whatever color it dominates.
Of course, the black color with its grayscale is really comfortable for the eye and very logical, but I do not mind if the image is covered in blue and its gradations or sepia - I have no problem.
What is the purpose of obtaining a positive image?
I will answer the question with a question.
- What is the goal of obtaining a negative image?
- I can encapsulate the positive big size film (8x10), put it in a frame and hang it on the wall directly, without the need to print the picture .....................
- Perhaps we can manufacture a camera that can film a huge x-ray film measuring (30x40) cm. We will put it inside a frame and hang it on the wall directly or sell the frame and the film inside - without going into another war with the magnifier and printing.
These are just crazy ideas that complement the main crazy idea, which is the idea of photographing on x-ray films.
My last question: Have you ever tried and tested this strange idea?
See my previous posts regarding positive internegative.
Blue is fine, but I don't think it looks good as a positive "finished" medium for a grey scale image. Highlights are blue, shadows are blackish-blue. You can do what you want, of course.
This isn't a new idea. Search in the thread and you'll find it comes up occasionally, because of course it sounds fun and easy...
By all means, enlarge whatever negative size you want on to as large a sheet of x-ray film as you can. No harm in trying, keep the film manufacturers in business. I may be buying some 14x17 x-ray soon...