Rodinal Special / R09 Spezial
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As I mentioned a few days ago, I am currently looking into the production of ferric oxalate, not because I am dissatisfied with Bostick&Sullivan's product, but merely out of a thirst for knowledge.
I do not know the recipe of B&S, presumably it is iron(III)-nitrate and oxalic acid.
In my first attempt I followed the recipe of Pizzighelli and Hübl (ferric hydrate and oxalic acid). An interesting alternative, but time-consuming.
In the second attempt, it was iron(III)-nitrate and oxalic acid. The time required is similar, but with fewer steps.
The substance is not clearly defined, which makes it difficult to determine the exact content of oxalate solutions. The prevailing opinion is that the solution for the platinum process should contain 27% iron(III)-oxalate, for the Kallitypy 20%.
For practical purposes, the determination method using the specific gravity is sufficiently accurate, although any free oxalic acid present cannot be determined.
For the Kallitype, a specific gravity of 1.13 results in a solution of about 20%; for the comparison of the mode of action, the three oxalate solutions were brought to exactly this value. The measurement of the pH value showed clear deviations between the (acidic) solutions, which indicates different contents of free oxalic acid.
Paper: Hahnemühle Platinum Rag
Developer: Sodium Acetate
To obtain comparable densities, different exposure times were necessary.
From left to right:
B&S 3 minutes, P&H 2:30 minutes, Ox (iron nitrate) 2:15 minutes.
Wie schon vor einigen Tagen erwähnt, beschäftige ich mich momentan mit der Herstellung von Eisen(III)-Oxalat, nicht weil ich mit dem Produkt von Bostick&Sullivan unzufrieden wäre, sondern lediglich aus Wissensdrang.
Die Rezeptur von B&S ist mir nicht bekannt, vermutlich handelt es sich um Eisen(III)-Nitrat und Oxalsäure.
Bei meinem ersten Versuch bin ich nach der Rezeptur von Pizzighelli und Hübl (Eisen(III)-Hydrat und Oxalsäure) vorgegangen. Eine interessante Alternative, doch der Zeitaufwand ist hoch.
Beim zweiten Versuch waren es Eisen(III)-Nitrat und Oxalsäure. Der zeitliche Aufwand ist ähnlich hoch, allerdings bei weniger Arbeitsschritten.
Die Substanz ist nicht klar definiert, was es schwierig macht, den exakten Gehalt von Oxalat-Lösungen zu bestimmen. Nach vorherrschender Auffassung sollte die Lösung für den Platinprozeß 27% Eisen(III)-Oxalat enthalten, für die Kallitypie 20%.
Für die Praxis ist die Bestimmungsmethode über das spezifische Gewicht hinreichend genau, wobei allerdings ein eventuell vorhandener Anteil an freier Oxalsäure nicht festgestellt werden kann.
Für die Kallitype ergibt sich bei einem spezifischen Gewicht von 1.13 eine etwa 20% Lösung, für den Vergleich der Wirkungsweise wurden die drei Oxalatlösungen auf exakt diesen Wert gebracht. Die Messung des pH-Wertes zeigte deutliche Abweichungen zwischen den (sauren) Lösungen, was auf unterschiedlichen Gehalt an freier Oxalsäure hindeutet.
Papier: Hahnemühle Platinum Rag
Entwickler: Natriumacetat
Um vergleichbare Dichten zu erhalten, waren unterschiedliche Belichtungszeiten erforderlich.
Von links nach rechts:
B&S 3 Minuten, P&H 2:30 Minuten, Ox (iron nitrate) 2:15 Minuten
TD: Kodak Tri-X 35mm film, developer D76 1+1 8'20°C. Exposure ISO 400 @35mm lens, available light. Digitized with Alpha 6000 edited in ACR, inverted in CS6.
In 1835, Berwick was told that its prison in the Town Hall was unsuitable and needed to be replaced. It took sometime to find a site, agree on plans and raise the money to do this. However, this project finally came to fruition with the opening of this building in Wallace Green in 1849 as a Prison. It's history as a prison was relatively short lived as it closed in 1878. However, having cost so much to build, a new use had to be found for it. Initially it was used as a Court house and by Berwick's Police Force, but then in the early 1890s it was purchased by Berwick's
Urban Sanitary Authority, it was converted to office
accommodation and stables were built on the back of the site. A plaque above the main door commemorates the completion of this work in 1892. From then until 2009, the building was used a Council administrative buildings, being eventually sold after 2015 to a local developer, who has converted it to four properties, retaining many of its original features, including some of the prison cells on the top floor.
White Sunday in Hürth
Rolleiflex T, Delta 400 @ ISO 800 in Finol,
Kallitype on HPR, Rochelle salt developer, MT10 Gold toner 4 minutes prior to fixing.
Late afternoon light on the marsh, Bald Head Island.
590nm IR-converted Pentax K-5
Rokinon 1:3.5 24mm ED AS UMC Tilt/Shift
3-shot shift panorama
Iridient Developer
Affinity Photo
It used to be a pub. The Sun Inn offered everything the traveller needed including accommodation and a beer garden behind the building. These days, pubs are being converted into residential homes and developers make sure that the yard behind is turned into accommodation too, rental or other.
Fuji X-Pro1.
Holga 120N Tri-x in efd.
Quality control is carried out after each production of ferric oxalate. I do not rely on the test for residual iron II salt, only the result after printing is really relevant.
Because different developers have their own characteristics in terms of maximum blackening, colour and susceptibility to fogging, I allow myself the pleasure of playing with developers.
Kallitype onto HPR,
Sodium acetate developer.
Delta 100 4x5 in MZB,
Kallitype on HPR, Ferric oxalate no.4 toner test, Sodium acetate developer.
MT3 Vario toner: bleach 1+50 30 secs, toner setting A50+40+900ml 30 secs.
Zwischendurch mal etwas zum Aufwärmen.
Linhof Technika Tmax 100 in Tanol,
Kallitype onto HPR,
developer Rochelle salt and Sodium tungstate mixture.
Photo information:
ISO: 200
Film type: 135
Film name: Rollei RPX 100
Developer: Adox Rodinal
Process: 20°C.
Developer dilution: 1+50
Developing time: 16'30"'
Agitation: in 20 sec every 1 min.
Camera: Exa 0
Lens: Tessar 2.8/50
Filter(s) used: no
Aperture: 11
Exposure time: 1/50
Focal length: 50
Scanner manufacturer: Epson Perfection V550 Photo.
Explored April 21, 2021
(Image taken recently with a B&W Analog roll film camera).
Very happy with the results from using Perceptol as the film developer. Was able to get almost no grain and high sharpness on my 35mm SLR. Great for printing large.
(Spanish): Muy contento con los resultados obtenidos al usar Perceptol como el revelador. La definition es estupenda y el grano casi no visible. Bueno para ampliaciones).
(Camera: Nikon N8008 + Nikon AF 24mm f/2.8 + Yellow filter).
(Analog Film: Kodak TMax 100 black & white Negative film).
(Technical Data: Develop on Perceptol @75°. Copy negative with a DSLR, then edit on Nik Collection Silver Effex Pro 2).
(Location: Palm Bluff Conservation Area, Osteen, Florida).
This image belong to my Album: Analog Photography.
Explored on April 21, 2021
Olympus OM2, red filter, Kodak High-Speed Infra-Red film developed in Kodak D76, negative scanned, digital processing in Lightroom.
The geotag is accurate to a few hundred metres only.
Holga 120N, HP5 in Tanol,
Kallitype on HPR,
Sodium acetate developer,
MT3 Vario Toner: bleach 1+100 1:20 mins, toner setting C.
Small waterfall below Secret Falls, Nantahala National Forest.
Pentax K-1
SMC Pentax 1:3.5 35mm
Iridient Developer
Before I give the credits to the developer let me first apologize to those who have followed me up to this point. my activity in the last 6 months has been minimal due to a horrible laptop. the other day I fixed that in buying myself a new computer, so I'm hoping that I'll be able to take more ambitious photography than ever. my inactivity got me unfollowed by countless members, and banned from multiple groups, so you can imagine I wont be doing that again :)
This lovely landscape was on my list for some time, I had seen it briefly on my old computer but there was no hope of capturing it before. not quite the WL I was looking for, but all my choice WL's are saved on my other computer. (side not if anyone knows how to convert a WL to file and transfer it, paint me interested and in turn, my windlights would be up for grabs to anyone interested.) I'll certainly have to be back or to one of their many other, equally beautiful sims when I get my WL's sorted.
Soul2Soul River - Thames River Valley and Private Rentals
Soul2Soul river rentals Thames sailing sun cottage private home waterfront rental photo white dunes jazz music popular nature cabin blog romantic photography romance beach scenic views hangout gacha flickr blogger shores riverbank sim forest 1960s 60s
Live Oaks (Quercus virginiana), Spring Island, South Carolina
590nm IR-converted Pentax K-5
SMC Pentax-A 1:2.8 24mm
Iridient Developer
Hasselblad 501CM, Planar 80mm,
Efke IR820 in Finol,
Kallitype on Hahnemühle Platinum Rag,
Sodium citrate developer,
Citric acid clearing bath,
ATS acidic fixer.
Eno River State Park
A second shot with a slightly different perspective, processed in color.
Pentax K-1
SMC Pentax 1:1.8 85mm
Iridient Developer
# Camera: Balda CA35
# Film: Ilford XP2
# Scanner: Nikon Coolscan 5000ED with VueScan Software
# Edited with Iridient Developer
The sodium acetate developer produces the coolest image tone in Kallitype.
One or the other user may well have doubts about this. If the results are not as cool as expected, this is not due to the developer but to the workflow. A really cool tone is only maintained if the print does not come into contact with tap water before fixing. If the print is rinsed with tap water after the developer or the clearing bath, the image tone will be significantly warmer. It is not a question of which shade is perceived as more pleasant, but rather an advantage to know how to control the colourfulness.
For toning before fixing (platinum, palladium, gold), a rinse cycle is advisable in order not to change the property of the toner by introduced acid. For all tonings after fixing, a cooler initial print has the advantage of a higher maximum blackening. This is not decisive for successful toning, but differences in hue and saturation become apparent.
Left: developer, Citric acid clearing bath 1% (with demineralised water), ATS acidic fixer.
Right with a short rinse with tap water after the clearing bath,
Kallitype
Hahnemühle Platinum Rag, Potassium Citrate developer, ATS alkaline fixer:
untoned
MT10 Gold toner
MT3 Vario toner (thiourea)
Rollei SL66SE, Carl Zeiss Planar 80mm f/2,8, Orange filter, T-MAX 100 Professional (Kodak TMX 6052) developed in Ilfosol S 1+9, digitised by photographing the original negative on a light pad - tethered capture and digital development in Lightroom.
The Howgills as a whole lie within the county of Cumbria, although the area remains in the Yorkshire Dales National Park.
"Cautley Spout is England's highest (cascade) waterfall above ground. (Gaping Gill on Ingleborough falls a greater unbroken distance into a pothole, and Hardraw Force has a greater unbroken fall above ground). The broken cascade of falls tumbles a total of [nearly 200m] down a cliff face at the head of a wild and bleak glacial valley that comes down from a high plateau called The Calf. [...] This fall is one of the few cascade falls in England; most are either tiered or plunge falls." (Wikipedia)
pl.wikipedia.org/wiki/Jelcz_043
Meopta Flexaret IIa (S/N:30130190a)
Meopta Mirar II 1:3.5 f=80mm (S/N: 20449300)
Foma Fomapan 400 (400 ISO)
Foma Fomadon Excel 1:1 for 10 min (20C)
Beginners in the technique of Kallitype often ask which developer they should choose.
Only a comparison of colour and tonal values with identical exposure time. To achieve the same level of blackness with the acetate developer, the exposure time would have to be slightly longer.
Illustrations/code-names for the development team here at work.
If you have a problem - if no one else can help - and if you can find them - maybe you can hire: The Developers.
A tree I have often photographed, Eno River State Park
Pentax K-1
SMC Pentax-A 1:1.2 50mm
Iridient Developer
Kettering, Ohio, 2024
Yoshi Lovejoy Lester wishes you a relaxed Happy Caturday!
Camera: Canon EOS 3
Lens: Canon EF 35mm f/2 IS USM
Film: Kodak Portra 400
Developer: Cinestill CS-41
Digitized with a Canon EOS R5, a Sigma 105mm macro lens, the Valoi 360 film holder, the CS-Lite light source, and a copy stand made out of an old Durst enlarger
Software conversion: Negative Lab Pro 3.0
I really like my new purchase. It's built like a tank (weighs like one too), built in bellows for macro shots, interchangable lens system, multi-exposure and looks so darn cool.
About the shot - Double exposure and processed in LightRoom. Shoot on Lucky 100 film.
This is also self-developed with Ilford developer and fixer.
Leica M2
Leica Summilux 35mm f/1.4 II
Ferrania P30
Adox Silvermax Developer (1+29)
11 min 20°C
Scan from negative film
This is a bulk gas carrier and guess what. That is a gas power station in the backround
Shot from Portishead Quay as the BRO Developer approaches Avonmouth.
Konica Auto-Reflex 60's SLR camera
Hexanon lens 57mm 1:1.4
Ilford Fp4+ Film
f 4 at 1/125
Home Developed by www.flickr.com/photos/ukke_photo/
Rodinal Developer 1+25
Every time I come to San Francisco, there is some kind of smart-ass billboard along the highway ... "ask your developer," it says.
Ask her what? Whether Twilio is better than some other provider? Whether the cloud is here to stay? Who comes up with these crazy signs?
Fortunately, it doesn't matter very much ... by the time I come back again, this billboard will have been replaced by something else just as mysterious.
Note: I chose this as my "photo of the day" for Nov 21, 2015
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In early November 2015, I flew from New York to San Francisco to take a weekend street-photography workshop under the tutelage of Eric Kim. As you might expect, I took gazillions of photos; but not all of them were specifically associated with the workshop itself. On the way out to San Francisco, I took a bunch of pictures with my iPhone; and during the weekend, I took a number of photos that had little or nothing to do with street-photography per se.
I’ll upload the photos in dribs and drabs during the next several days, and let you decide which ones are sufficiently interesting to warrant a second look…
* Kodak Retina II - type 011 (1946-1949)
* Ilford FP4 plus film
* Kodak D76 developer in 1+1 dilution
Here is a picture of the camera: flic.kr/p/2kB1nJ3
I've tested 9 programs for the purpose of processing challenging nightscapes and for preparing images for time-lapses.
The comprehensive review can be found on my blog here:
amazingsky.net/2023/01/01/testing-raw-developer-software-...