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Showing posts with label developer. Show all posts
Showing posts with label developer. Show all posts

Saturday 25 February 2017

Picture Post Eukobrom AC Developed photographs

Paper Kentmere RC gloss.
The images that appear in this gallery have been processed using Tetenals Eukobrom AC developer on a number of different papers.

I would like to thank Tetenal for there interest in and re-blogging of the first look post. It was a big surprise when they got intouch.

There is a new post on Eukobrom to be published not all good news.




Paper Fomatone  Chamois 542-11 matt


Paper Ilford FB gloss
Paper Fotospeed RC gloss

Paper Kentmere RC gloss

Paper Fomatone Chamois 542-11 matt


Technical Data:

Camera Bronica SQAi, lens 80mm, Film ilford FP4+ iso 125, Fomapan 100 iso 100, Negative size 120 6x6, Developed in Studional.

Scanned from paper size 9.5 x 12, paper used listed with each image.









Saturday 14 January 2017

Living with Tetenal Eukobrom AC

Developer
Tetenal new Eukobrom AC is proving to be a delight to work with. I did not realize how much of a irritant the smell of the developer was until it had been removed from the equation. I no longer have developers nose where the smell lingers long after I have left the darkroom. 

In an early article on this developer I had a couple of questions: Personally the main questions yet to be resolved are its keeping qualities and whether or not the image will be warm when the developer starts to deplete. One of these has now been answered, that is it's keeping qualities. I have been using it in my slot processor, at the end of each print session I leave the developer in the slot and cover it with the lid. The amount of time between each print session varies a lot from days to weeks sometimes months.

Slot processor
 Two things have come to light. If you leave the developer in the slot you should give it a stir before you start using it again. The active ingredient can separate out dropping to the bottom. I was caught out thinking that the developer had come to the end of it's working life because it had been left for two weeks. Something I did regularly with Ilfords multigrade without loss of usability.


Something else I have not experienced before was a black and white crystalline substance on top of the stop bath. It was a very heavy build up making it difficult to remove the top off the stop. The stop it's self was clear and still at the level it had been left at, turning out to still be working even so I changed it. This maybe an interaction with the vitamin C - something to keep an eye on.

The other question about the warming of the prints as the developer depletes still remains unanswered. This due to the fact I have not processed enough prints with the fresh developer. Once I notice I'll let you know.


 
Finally I have used this developer with a number of makes of paper now - RC and FB, natural, warm, cool tone and tinted papers - With great results, so if you have not tried it yet, do so! you can get it in 250 ml shots which is More than enough to get a feel for the way it works and looks.





Technical Data:

Developer Tetenal Eukobrom AC, paper Kentmere RC gloss. 








Sunday 31 January 2016

Patterns of negative grain.

RO9 developed FP4+

Ever since I started writing this blog I have been looking for a way to show you what grain is produced by different developers. I have used a number of methods without success over the years. Until late last year when the need to show what the grain looked like raised it's head again. By chance I had my phone in my hand when the idea to use the enlarger and phone camera together came about. It is one thing to have a good idea it is another to put it into Practice.


PMK Pyro developed FP4+


A long time later I managed to get two good images from different rolls   of 120 FP4+ that I was happy with. They show a visible difference between the one developed in PMK Pyro and the other developed in R09.

 When I have more time I will make  images of other film developer    combinations if you are interested.   

Wednesday 27 January 2016

FB papers developed in Tetenal new Eukobrom AC.

Four papers side by side.
There is not a great deal I can add to what I have already written about Eukobrom AC. I was not expecting to show you a set of FB prints so soon after my first use of this new developer. The questions I still have need a good amount of time to pass.


A partial answer to one question is that the developer will keep for at least three days after dilution. As long as it is bottled at the end of each session when being used in a tray. A litre of 1+9 strength so far has produced twenty images of mixed sizes. According to Tetenal you should get about 1,353 prints of 30 x 24 cm out of each 250 ml of concentrated developer. Which works out at about 54 prints per 100 ml diluted at 1+9. Obviously in practice this will vary depending on dilution, paper and conditions of use.

While I was developing the FB images I did notice that different    papers could take up to sixty seconds before they started to show any signs that the paper had been exposed and a further sixty to complete the process. Knowing when the increase in images appearance is down to reduced developer activity will take time to discover.



Ilford cooltone fibre base paper
I chose three makes of FB paper: Ilford cooltone, warmtone and natural - all gloss, Fomatone MG classic chamois 542 mat and Adox MCC gloss. All the papers were exposed at grade three but unlike their RC brothers the exposure time had to be adjusted as some of the papers required a lot less light. Again the tones had good separation, rich blacks and clear whites.




Of the three Ilford papers the natural paper took on a cool tone, where as the cooltone took on a warmish tone. This could be the first indication that the developer is depleting. If this is the case then it is exhibiting the same traits as those traditionally produced. The slight colour change indicating that the silver has not been fully developed. I have written about the changes of colour you can expect from exhausting developer in another article.
 
Fomaspeed 524 matt warmtone.


When it come to pushing or pulling the print (This is where you over expose the paper then pull it from the developer when it has reached full development before the suggested time for full development.) I have so far kept to standard use.
Adox MCC fibre paper


If you have not tried it yet give it a try. If you have used it let us know - always interested in what others think.  


Sunday 27 December 2015

Tetenal Eukobrom AC first look

I like trying new things out in the darkroom, so when an offer to use Tetenal's new monochrome paper developer Eukobrom AC came up I jumped at it. I would like to thank Matt of AG Photographic and Tetenal for the chance to be one of the first to give it a test drive. A few weeks later a package arrived at the door, since then I have been chafing at the bit to try it out.

This is a new developer made for twenty first century. It is also the first commercially to use isoascorbate, vitamin C (you're not seeing things) as the main developing agent, it is a direct replacement for Hydroquinone the most widely used ingredient in photographic developers, noted for it's fast action and high contrast. It is marketed as the alternative to Ilfords multigrade all purpose paper developer producing the same sort of neutral tones. The developer works with both Fiber Baryta and resin coated light sensitive papers, whether multigrade or graded.

Top row: Ilford multigrade RC paper. left side in
multigrade developer. Right side Tetenal.
Bottom row: Fomaspeed variant RC paper. 

The data at the moment is quite sparse.

Technical Data:

Fibre Baryta
Paper (FB)
Dilution
20C
25C
30C
1+4
90s
70s
50s
1+9
100s
80s
60s
Resin coated
paper
1+4
50s
30s
15s
1+9
70s
50s
30s

All information is provided for guidance only. Deviations may arise,
depending upon the paper used. Shortening or extending the development
time by up to 10% is possible.

Diluted 1+9  Eukobrom

In to the Darkroom.

The first thing you notice with this developer is it's lack of odour. The next is the colour of the liquid, a rich yellow. I decided to dilute at 1+9. Once done I poured the contents of the measuring jug into a tray. I would have used my up right paper processor but that already had fresh Ilford multigrade in it. Using the tray for the new developer would allow me to note how long it took for the image to start appearing.

The comparison.

I have several makes of light sensitive paper in stock. I chose three, the most obvious Ilfords multigrade, Fomaspeed Variant 311 and Kentmere VC select gloss, all resin coated papers. I went to these first as they are reasonable quick to process and give an insight into how the Eukobrom will perform. Before moving on to FB papers. (results to follow in another post)

The set up.


I chose a negative from a recently developed set of Agfa APX100. I set the height of the enlarger so it would produce an enlargement of 9 x 12 then set the easel to 8x10. I did this because the Kentmere paper I wanted to include I only had in 9x12, this would keep everything consistent.

Ilford multigrade RC  paper
 developed in Tetenal developer
 
 
The test strip was processed in the multigrade developer and it was indicating that the image would need to be dodged, if I wanted a picture I was happy with. I set the enlarger as follows lens F8, grade 3, exposure: The whole image was exposed for twelve seconds, the sky from the bridge upwards plus eighteen seconds and finally the sky from half way up to the top of the image plus eighteen seconds. I would produce two pictures on each paper all at the same setting. The developers temperature was set at 20C.


Ilford multigrade RC
 Paper developed in Multigrade
 
Results:

Both developers are advertised as neutral tone. To me this means they are subtlety on the cool side.

The differentiation started with:

  • The Ilford paper when compared with the other papers in the test, has a slight warmth to it's tone when developed in fresh multigrade. The Eukobrom is slightly cooler in look with a more intense black and crisper whites giving it a bit more contrast.
  • The Fomaspeed paper has a cooler look to it when developed in multigrade compared to the Ilford paper. The Eukobrom proved to be cooler looking again with more intense blacks and clearer whites again adding to the contrast.
  • The Kentmere paper is known to have a higher contrast level to the previous papers mentioned maybe as much as a grade. When developed in multigrade the image had a muddy look to it indicating over exposure with a slightly warm feel to it. The Eukobrom processed image had a cleaner crisper look. Again the midtones had better separation making it look more like a moon light picture instead of over exposed.
Fomaspeed variant RC
 developed in Tetenal
 
Once you understand that Eukobrom adds contrast to the image possibly more so than the Hydroquinone it replaces. It is easy to allow for by reducing the grade you would normally use. The blacks are wonderfully rich giving the pictures some real punch. The mid tones have more separation than Ilford multigrade but the surprise is the brightness of the whites.

Fomaspeed  variant RC
developed in Multigrade

Personally the main questions yet to be resolved are its keeping qualities and whether or not the image will be warm when the developer starts to deplete.


Kentmere paper.
Top Row:
exposed at grade three.
Right side Tetenal developer. Left multigrade.
Bottom row: exposed at grade two.
 
This is a nice developer to work with for prolonged periods as you do not get that developer smell lingering up your nose afterwards. Oh! It does look like OJ when diluted so keep it out of the reach of kids. It is a real gem and I will be ordering a bottle, it may even replace my favorite multigrade! Don't take my word for it try it for yourself you will not be disappointed. 


Saturday 26 December 2015

RO9 special/studional six months from dulition.

Fomapan 200 test negatives.
I'm now six months down the line with this litre of RO9s/Studional and nine completed developments to date. With it now being three months on from it's suggested 'best before' time I started this processing session with the last seven frames from my out of date Fomapan 200, to check that the developer was still viable.

 The Fomapan was in the developer for eight minutes this included the 20% compensation for developers age. For me anyway this developer was now in completely unknown territory and the 20% adjustment was under review again. Although the last time I used the developer the urge to increase was very strong, I considered it again and dismissed the idea very quickly this time. Remembering what I had said last time.




Agfa APX 100 negatives
As soon as the film had been fixed I pulled it out of the developing tank to check. On first look it looked like it had not worked but on closer inspection there was a very good looking negative peering back at me. Great! Now I can get on with the others.

including the 20% and a roll of Fomapan 400 which stopped me in my tracks for a while as I had no suggested development times for it. Ah! What to do? I was processing this for someone else. Don't panic Mr Mannering. I checked through the Massive dev charts 400 ISO film times for Studional with dilutions of 1+15. It was saying that between four and eight minutes. Which is quite a leeway to pair down. I then looked at the Agfa and Rollei times for 400 ISO film to try and shrink the time difference. This helped a lot, it was suggesting five and a half minutes as an average. So me being me rounded it up to six and added 20% which worked out at a bit over seven minutes.

 I intended to develop for seven minutes and ended up doing eight I was interrupted loosing track of the time. It is possible that the mix up has made for a better developed set of negatives which may have worked in my favour this time. Which leaves a dilemma for the next roll - what time should I use?

Fomapan 400 negatives

All in all this out of date developer has proved its self to be a good performer, out of the three newly processed film the Fomapan 200 is disappointing in that the negatives are a bit thin. Some of this is to do with bad exposure and not the development. On closer inspection of this last length of film it looks as though the surface has been contaminated with sweaty finger marks, some scratches and a lot of dust marks on the negatives. Not surprising really seeing that the film has been cut into sections on three other occasions.


It turns out that the Agfa APX 100 has been over developed. I have also noted that the negatives are a bit more grainy than they should be. This could be the down side of using the RO9s outside the three month best before date.


So what now? The developer is good for another three film but I think it will be discarded for a new batch. The reason for using this developer in the first place is because of it's finer grain. If I want it coarse looking I'll use RO9.





Friday 25 December 2015

Looks like coffee not multigrade?

Ilford multigrade paper developer
It has been sometime since I have entered the orange light district. Upon entering recently the darkroom looked a mess, something I don't remember leaving.! It could do with a good clear out and clean up but that will have to wait. I'm in desperate need of print therapy. I do a quick clean of the enlarging easel and lens. Then check the chemicals in the paper processor.

 The developer has gone a very deep brown, the stop and the fix look OK they were all fresh the last time. Even so I change the fix. Now what to do about the dev? In the end I emptied out half so I could refill it with fresh. Your thinking 'it's knackered why bother?' but I prefer the tone you get when fresh and old are mixed together. The slight depletion gives a warmth to images I like.

Contact prints.
I opened a partly used bottle of Ilford multigrade and poured out some of the contents to be met by a liquid the colour of black coffee! That's a new one on me never had that before! Which makes me think - ( expletive ) Mmmm! I'll use it anyway see what happens. I do not have a choice as I do not have a fresh bottle on the shelf.


First test print
It was my intention to get on with some enlargements, but I decide to contact print three sets of freshly developed 35mm negatives as this will test the strength of the developer. It turns out that the dev is more depleted than I had expected ( you were right). The contacts are taking nearly two minutes to reach full development and that is a very long time for resin coated paper, which is usually fully done in a minute.

Before I start work on the enlargements I drain another litre of developer and add some more 'black coffee' (developer) to the mix. Then load the first negative into the enlarger. I find I can be a little apprehensive getting ready to do my first print after a long absence. I'm not sure why, as it always works well.  

Second test print

With the first test strip exposed, into the dev it goes. Ah! I was a little quick off the mark the developer has not reached 20C yet as it takes a little over a minute to fully develop. As it turn out the test strip shows that I was being optimistic with the F8 aperture I had set. The test strip is not showing any exposure in the first four, five second segments. Indicating it will take more than fifty seconds to reach a base exposure time. That's far to long so, I adjust it to F5.6 effectively doubling the light. The next test strip I start at fifteen second and go on from there at five second intervals. Sometimes I can over develop the negatives and this is the first indication of it. Which I don't mind. The trick is not to over do it as it leads to loss of detail. That's better! the test strip was fully developed in less than a minute.

How the areas were dodged showing
how much extra light was added to each
section

With the second test strip in the holding try I take my time looking at the segments. My vision for the image has already formed and with a plan. All I need now is get off the fence and decide what time the first print should be exposed at. I plump for twenty two seconds at F5.6 at grade three on Kentmere RC gloss 9x12. I have already noted that the Ro9s negatives are a little softer than the normal Ro9 and not as grainy.

I need to point out here that I always work from wet test strips and automatically add a dry down factor without thinking. Ansel Adams used to tell a story of how he came to recommend that you should always work from dry test strips and prints. He had produced a particular photograph that was a delight to the eye so much so that he went ahead and printed a large number of them. Only to throw the whole lot out the following day as they did not look as good as when they were wet. I don't very often do long print runs and if I do it is not until I have studied the print dry in day light.

Final print.

As I look at the photograph in the holding tray with the rooms light on I can see it is over exposed, dull and muddy looking. It lacks the luminosity I have come to expert from analogy prints.

I already new that the picture would need dodging to recreate my vision. I inspected the test strip again and cut the overall exposure time to fifteen seconds. I then dodged the foreshore and wooden posts while I added a further seven seconds to the water above them and the sky.

 
Again I studied the second print in the holding try. Although it had improved, It still fell short of my vision. It is a good idea to have a notebook to hand in the darkroom so you can keep track of the adjustments. I have now cut the overall exposure to eleven seconds. I will add a further seventeen seconds in three sections. First of all I will add four sec's from the edge of the water to the rest of the picture. Next, seven sec's from where the wooden posts finish and finally seven more seconds to the upper part of the sky.


These last adjustment have improved the image no end. Bringing it very close to what I had in mind and giving it the luminosity it lacked. There maybe some fine tuning needed when I print it on FB paper but I will only do that once the photograph is fully dry.
With the three prints side by side
You can see how the image has changed.

The coffee coloured developer has worked well even with the heavy oxidation of liquid. A change in colour does not always mean it has lost it's potency. Now that the photograph is dry the image has a very gentle warmth to it. I have found that the tone a photograph takes is more pronounced once it is fully dry.


 

Friday 23 October 2015

RO9 special/ Studional three months on.

Out of date Fomapan 200
Another month on and I'm back to using the turquoise Studional and a further cutting from the Fomapan 200, only this time there are couple of dozen images to muck up. The chances of something going wrong diminishes as you get used to the way the developer works, the only spanners are out of date film and senior moments, if it all go's wrong I may learn my lesson.



Out of date Fomapan 200
So far the developer has been used seven times without it missing a step. When comparing the negatives with the naked eye or in this case a magnifier the density between the batches looks to be identical. As far as the compensation factor is concerned this is uncharted territory for me. The question is, does 20% allowance still apply two months on? Thinking on it carefully the answer is yes. My reasoning is that to increase it without knowing whether the suggested compensation worked or not does not make sense. I should test the information and not do my own thing.
 

The information on this developer states that once it is diluted one litre should be good for three months or 12 film processes which ever you arrive at first if stored properly. I will admit that the bottle this is stored in is to big leaving an air gap that will allow the developer to deteriorate more quickly according to the data sheet. I have not done this on purpose I didn't have a container the right size and yet it still works well. Obviously it is better to do what manufacturer recommends to get the best results but in the real world we all make compromises. So is it such a surprise that I'm getting good results? The real test will be at four, five or six months after dilution.


Out of date Fomapan 200
 I processed the negatives as previously mentioned and the results are just as good so much so that I also developed a roll of Agfa APX 100. It just so happens that the dilution for this film is 1+15 (the same as HP5+) or 1+31 for 4 and 8 minutes respectively at 100 ISO. With the 20% adjustment added it took all of five minutes in the developer to receive another set of good looking negatives.
 
 
 
The more I use this developer the more impressed I am with it.


 The table below shows ten popular film that use the 1 +15 dilution. The ones marked with * are the ones I have had good results with at the suggested times with the compensation added.

The double ** is my suggested time for this film at this dilution.


Dilution of 1+15


Film
ASA/ISO
TIME
Adox CHM125
100
3.5
Agfa APX 100 *
100
4
Fomapan
100
10
Fomapan **
200
6
FP4+ *
125
4
HP5+ *
400
4
Neopan
400
6
PAN F+
50
3
Rollei Retro S
400
8.5
Tri-X
400
05/03/05

All the images that appear in this post were Developed in RO9 special
Studional.

This image is from the Agfa APX 100 film mentioned.















Saturday 17 October 2015

Black developer!?

I have gone back to using 35mm film, in so doing I have resurrected an old and long running project of portraits. I have never been backward in coming forward to ask people I meet if I can take their picture. When asking my chosen subject I'm polite and friendly with a little charm. It is not often that I receive a straight rejection. I've noticed that it tends to stop people for a moment, at which point I tell them it's a film camera. It appears that this is a reason for them to say yes when chatting with them.

This new interest in lugging my Nikon F5 around with me has also reunited me with a long time favorite film Agfa APX 100. I cannot remember exactly the last time I used this film but I do know it was back in the days when I regularly used ether ID11 or PMK Pyro. I still have both these developers on the shelf in powder form. Which led to a bit of a  dilemma once the new roll of
APX was ready for developing. Should I make up a new batch of these old friends to keep the look of the negatives the same or go with the current ones???.
                                                        

I chose to go with RO9 partly because I wanted to see what sort of negative it would produce with the APX.                                                                      
Agfa APX  negatives developed with
RO9 special.
Before starting I made up a litre of fresh stop, fix and 300 mls of developer. I processed the film for the suggested thirteen minutes. The time counted down, as I poured out the developer, I was shocked to see this black liquid fill the measuring cylinder what the Hell! My first thought was that all the emulsion had come off, stupid I know but it always interests me what thoughts come into your head when things take you unaware. Needless to say that when I looked at the negs after they were fixed, all was OK. The negatives are nicely toned. I am not sure yet how grainy they are as Ro9 tend to be more grain than ID11.




It's just another colour to add to an increasing list of used developers.