Short 35 second video summary of a kallitype test print development from last night, showing the many different color changes a print undergoes before one can actually fully check the final result. With a trained eye, you can already make a determination quite early on, but in general each of the stages has potential to throw your expectations, sometimes tones even shift in the 24h-48h after initial drying...

Btw. This print hasn't been fully cleared by purpose and the emulsion is still partially visible in the final print. I was saving time and here was only really after tweaking the overall tone & darks...

#AltProcess #Kallitype #Darkroom #DarkroomPrint #PrintMaking #FineArt #AnalogPhotography #LandscapePhotography #Dolomites

Haunted House.
Circular #ICM

#FensterFreitag #windowFriday

🧻 Foma Retrobrom 151 (old batch) in Moersch SE5
Lith Ω - 45 sec
🎞️ FPP Low ISO B&W (EI 6) in HC-110 1+90
📷 Canon EOS 3 | Canon EF 17-40mm f4 L

#BelieveInFillm
#FilmPhotography
#35mm
#LithPrint
#DarkRoomPrint

An evening well spent in the photo basement lab: Preparing new ferric oxalate and silver nitrate sensitizer part solutions from scratch, pH testing and logging state of various other fresh processing chems, filtering solutions, doing a bunch of test strips... and a lot of waiting in between (emulsion takes around 1h to dry, then up to 20 mins exposure), good time chunks for researching...

Still on the quest to achieve cooler & deeper tones, but also quite happy about the new deep & smooth black/brown I discovered along the way. Learning about dichromates and impact on graininess... In the larger picture, the aim is to narrow down the number of variables to tweak the overall fiddly Kallitype process to be as predictable as it allows or is feasible, from controlling &n documenting the age of solutions, temperature ranges, air humidity (for paper), duration of processing steps, concentrations, pH values, filtration/contaminants, and, and, and...

#AltProces #Kallitype #Darkroom #DarkroomPrint #AnalogPhotography #PrintMaking #FineArt

Started creating browser-based calculators for quickly computing a bunch of recurring things in darkroom processing, so far:

Scale amount by area:
Given reference dimensions and amount, compute scaled amount needed for new target dimensions.
Example: Compute drops of emulsion needed for a new print size

Two-part solution ratio:
For a total volume of a two-part solution with a A:B target mix ratio, compute how many units are needed of both A and B.
Example: For N drops in total, compute how many drops are needed for A & B using a 1.2:1 target ratio

Solution addition:
Compute the amount of solution A (with given concentration) to add to another volume to achieve a certain target concentration (for solution A)
Example: How many extra drops of a 25% contrast agent solution are needed to achieve a 5% solution with a certain base emulsion volume

More calculators forthcoming... Feel free to ping me with any other useful formulas you'd like to have added...

Bookmark this on your phone:
https://demo.thi.ng/umbrella/darkroom-calc/

(The UI is responsive to the system's dark mode setting)

Source code:
https://codeberg.org/thi.ng/umbrella/src/branch/develop/examples/darkroom-calc/

Btw. This is https://thi.ng/umbrella example project #186 and relies mostly on these packages:

- https://thi.ng/rdom & https://thi.ng/rstream for reactive UI & computation
- https://thi.ng/rdom-forms for reactive form element abstraction/creation

#ThingUmbrella #AltProcess #Darkroom #DarkroomPrint #AnalogPhotography #Calculator #Reactive #UI #TypeScript

New UV lamp, new developer handling & my largest Kallitype print so far (~10x7 inch) — a shot of the iconic Oeschinensee cirque, surrounded by 3500+ meter mountains...

The new light setup is ~10x slower than my other light box, but allows me to do much larger prints in the future. The developer is chemically still the same, but now heated to 40℃. The photo is originally from an old iPhone 6.

The negative needs some more tweaking to increase contrast and maybe another minute or two of longer exposure...

Really excited to be doing larger prints (next step is double size 11x15 inch), giving those fragile mountain landscapes much more presence in person and this old photo process emphasizing their timeless character...

#AltProcess #Kallitype #DarkroomPrint #PrintMaking #FineArt #Photography #LandscapePhotography #BlackAndWhite #NoirCountry