why xz compression is not good to keep files, see what wget developer writes about it: https://www.nongnu.org/lzip/xz_inadequate.html

see also ycombinator thread https://news.ycombinator.com/item?id=12768425

#compression #xz #bz2 #wget #developer #opinion #technology #utility #unix

բնօրինակ սփիւռքում(եւ մեկնաբանութիւննե՞ր)

i have learned an interesting way of developing b/w film.

first of all, you don’t need to buy a developer, like d76 or rodinal. you can make a better developer yourself. (:

for that you need: solution number zero:

  • Sodium sulfate, 100 gr. (btw, in English “Natrium”, which is “Natrium” in German, Russian and Armenian is called Sodium fore some reason!)
  • Metol, 5 gr.

Dilute this in one litre of water.

solution number one:

  • Borax, 10 gr in 1 litre of water.

Keep the film for 7 minutes in the first solution, then 7 minutes in the second solution. if you feel you need more details in shadows, then keep up to 15 minutes for the second time.

what is important, and what distinguishes this process, from d76 is that you never can “spoil” the negative. whatever ISO is it, however long you keep the film in the fluids, it will “expose” what is on the film, but it won’t go beyond that. I even got to know how does that work chemically, but i cannot explain that myself.

this solution is also known as Kodak D23, or “hungry development”.

By the way, you don’t need to buy a “Stop bath” solution as well. Just get %5 solution of Acetic Acid and dilute it in one litre of water. That’s your stop bath. (:

For instance, this one works very well:


Also, it is possible to get a fixer from the med lab, which works with x-rays processing, but i haven’t learnt that yet. (:

#photography #photo #developer #development #d76 #d23 #black_and_white #black-and-white #bw #negative

բնօրինակ սփիւռքում(եւ մեկնաբանութիւննե՞ր)

how to develop kodak-cft film:

— d-76 developer 1 to 7. — 45 minutes. — turn tank upside down every 3 minutes.

that gives not bad results. however, may be there could be more grain. people talk that it is possible to use ilford developer and add something in order to get more grain. i have no idea what.

#kodak #developer #d-76 #development #film #film-photography #photography

բնօրինակ սփիւռքում(եւ մեկնաբանութիւննե՞ր)

how to develop kodak cft film:

  • d-76 developer mixed with water 1 to 7.
  • wait 45 minutes.
  • turn the can upside down every 3 minutes.

this way it works, but it could have more grain. one guy uses ilford developer and adds something for grain to make image smoother. i have no idea what does he add.

#photography #developer #film-photography #d-76 #kodak #kodak-cft #film #black-and-white #bw

բնօրինակ սփիւռքում(եւ մեկնաբանութիւննե՞ր)