How well will RO9 Special/ Studional perform a month on from dilution.

Nikkormat FT2 camera

 The developer has been diluted for two months, it's time to see if there has been any degradation of the solution over those months. It was not my intention to put the developer on the spot by using an out of date film and then to pick a make of film that I find difficult to get good results with but the die had been cast by the fact that a film had been loaded into my FT3 some time ago and then promptly forgotten about.

 

Developer  has changed colour

So what happened? To start with as I poured the developer into the graduate it was a gorgeous turquoise in colour. This is the second time I have used this batch of Studional so I have not a clue what this colour represents, it was clear when it was fresh. For all I know this could mean that it is dead and buried and the best thing to do is pour it away. RIP. I carried on anyway no point stopping now. I need to know what the colour represents. Good or bad?

 

This batch of developer had been diluted 1+15 but according to the data sheet it should be 1+30 for Fomapan 200 processed for 12 minutes plus 20% increase for the age, as the table indicates. Seeing as I have not taken any notice of the indications this will not work I throw caution completely to the wind and cut the development time in half and add 20% which I ignored developing for eight minutes. What the hell!

 

Contact print Fomapan 200.

So what did you think happened? Well! Yes, you are wrong. I am astounded these are some of the best negatives I have made with Fomapan 200 they are crisp and punchy or should I say they have a very good tonal separation, producing some rich blacks as the photographs that illustrate this post show.

8 X 10 print on  Ilford RC gloss

I should throw caution to the wind more often if the results are going to come good like this!

Using RO9 special/ Studional as it was intended.

Negatives are FP4+ and Fomapan 100

I have had the opportunity to use RO9s/Studional as it was intended. Multiple development from the same batch of developer (1 litre will do 12 films). This is a new departure for me, I prefer the single use type. I was a little apprehensive with this decision but gathered four 120 format films together so I could put to the test the assertion that you can develop any number of film on the same day it was diluted without having to add a compensation factor for each film involved, as you do with other developers. This was something I had not heard of before.

Made using a Zero multi format pinhole camera.

 The two makes of film were FP4+ and Fomapan 100 in both cases at box speed. It just so happens that the dilution for these films is 1- 25 with a big time difference - four minutes for the FP4+ and ten for the foma 100.

As mentioned before in another article the developer has a syrup consistency to it as you pour it out. At this point I must add a warning because of the concentrated nature of RO9 special/Studional you need to take precautions when pouring it out to make up the working solution. I have found out to my cost that if you get it on your hands it has a nasty bite. Something I have not experienced when mixing up other developers.

Made using Bronica SQAi.

 With the developer made up the first film to be treated was the FP4+. I was curious to know how well the short process time would work. This will be the quickest I have ever produced the latent image. The actual time suggested was three and half minutes - you need to be careful of short times when it comes to processing film, so I upped it four minutes. Not a lot I know but it could mean the difference between a reasonable set of images and a good set. I can report that it was a good set of negatives with good density across the whole film. The next film out of the processing tank was the Fomapan 100 processed at the suggested time of ten minutes. Again a good set of negatives in fact when held up against the FP4+ film they looked Identical in density. To cut this short the third and fourth films were the same in look as their predecessors. I was not expecting such good results.

Made using a Bronica SQAi.

  The method I used was made up of my trusted inversion procedure and a returning of what was left of the 600 mls of developer back to the storage bottle. Let me explain, when you pour the developer out of the tank there is a a certain amount of fluid lost to this action. It is only a small amount but can be enough to stop the top edge of the film being fully immersed. With this in mind I poured the developer back into the litre bottle and then poured it out again into the measuring cylinder before each film processed. I could have just topped up the difference. This is me erring on the side of caution. This action may have rejuvenated any depletion that had occurred but I suspect that this is not the case with this developer.

Idle time between two batches	Development lengthened by
few hours (but development none *on same day)	None *
1 – 3 days	5.00%
4 – 8 days	10.00%
1 – 2 weeks	15.00%
over 2 weeks	20.00%

 
Related posts:

RO9 special developer
One month on

RO 9 Special developer.

Recently, I had an unexpected back log of film to process It can be difficult to find the time to do them especially when it is more than a couple of rolls. Anyway a gap opened up so I dived into the darkroom to load two of the rolls ready for development. As I reached for the RO9 my attention was attracted to a couple of bottles of developer standing behind it. RO9 Special and Studional which as it turns out are one and the same along with Rodinal Special. While I was boxing up the first couple of film I had a rush of blood to the head and decided to give the RO9 Special a try. There was method in my madness.

At the time of my decision I had no background knowledge of this developer apart from how it was marketed and the information on the side of the bottle which is sparse to say the least. The blurb stated that RO9s was the finer bread brother of RO9 which was what attracted me to it in the first place. Part of my madness had been influenced by a cassette of HP5+ I had been given to process.

120  FP4+ Negs Developed in RO9s

In stead of jumping in at the deep end with both feet, I thought it prudent to check the very short developing times printed on the side of the bottle by processing a roll of 120 FP4+. Because I have a tendency to slightly under expose my negatives the suggested time of three and a half minutes at a dilution of 1 to 15 was increased to four. I used my standard agitation method of twelve inversions for the first thirty seconds and then four every minute. As there was no indication to the contrary. As soon as the fix was poured out of the tank I checked to see if they had developed properly. From what I could see they looked perfect. I had not intended to do a grain comparison for this film, it was purely to see if the times on the bottle worked in my favour.

The info on the side of the bottle for HP5+ suggested four minutes at 1+15 - I processed the film for five; as it turns out it was a good move. I think the negatives would have been a bit thin otherwise.

I have now researched process times and developer information for RO9s Something I should have done first with a visit Digital truths Dev chart for more times. They tell you to look at Studional.

HP5+ Negs developed in RO9s

 

Something else I had not been aware of was once the developer had been made up you could use it again. I had a suspicion it could be used again because the concentrate had a syrupy look when I poured it out. In fact you can process up to twelve rolls of mixed formats per litre. The most interesting thing about this developer is that there is no time compensation if you do more than one roll of film on the same day. You only add a compensation factor the longer the working developer in stored. Up to three months.

Developer Data:

RO9 Special/Rodinal Special and Studional.

Characteristics: Fine grain sharp negatives with good contrast. Once diluted can be stored for multiple use. Short process times.

Mixing instructions: Dilute concentrate with water 1+15

Number of Film per Dilution: 10-12 35mm or 120 format per Litre.

Temperature: Is best kept between 18 C and 24C with + or – adjustments as needed to the length of the development time.

Agitation: Tilt the tank for the first minute continuously and then once every minute. You should avoid developing times under three minutes.

Shelf Life: Concentrate should last 2 years in original bottle with no air gap. Once Diluted it should last 3 months without air gap in it's own container.

Time increases for multiple use: To keep speed yield and contrast consistent the diluted developer should be kept in brim full tightly capped bottles if this is achieved the following will apply:

Idle time between two batches	Development lengthened by
few hours (but development none *on same day)	None *
1 – 3 days	5.00%
4 – 8 days	10.00%
1 – 2 weeks	15.00%
over 2 weeks	20.00%

* with Atomal FF: + 10 %.

The extra times given above do not change if several films are simultaneously processed in one batch.

Suggested development times for use with RO9 special, Rodinal Special and Studional:

Film type	Time *	Speed
Agfapan APX 100	4 min	ISO 100/21°
Agfapan APX 400	6 min	ISO 400/27°
Fuji Neopan 400 Prof.	3 min	ISO 320/26°
Fuji Neopan 1600 Prof.	3 min	ISO 800/30°
Ilford PAN-F Plus	3 min	ISO 50/18°
llford FP 4 Plus	3.5 min	ISO 100/21°
Ilford HP 5 Plus	4 min	ISO 400/27°
Ilford Delta 100	3.5 min	ISO 160/23°
Ilford Delta 400	4.5 min	ISO 400/27°
Ilford Delta 3200	6 min	ISO 1250/32°
Ilford SFX 200	4 min	ISO 125/22°
Kodak Plus-X	5 min	ISO 125/22°
Kodak Tri-X	3.5 min	ISO 400/27°
Kodak T-MAX 100	5 min	ISO 80/20°
Kodak T-MAX 400	5 min	ISO 400/27°
Kodak T-MAX p3200	6 min	ISO 1250/32°
Kodak Recording 2475	6 min	ISO 640/29°

• Small tank or tray processing at 20 °C.
• Information above supplied by Agfa.

Almost forgot the reason for the rush of blood to the head if you had not already guessed it was to do with the 35 mm HP5+ I find that this films emulsion tends to produce rather grainy negatives with standard RO9. As I intend to enlarge these negatives to 9 x12 the finer developer should make the prints less grainy. I am pleased to say the strategy worked, the negatives have a much finer grain than the standard RO9. The proof of the pudding will be in the printing of the FP4+ and HP5+ negatives. I will share more prints in another post.

9 x 12  photograph from 35mm HP5+ negatives developed in RO9 special