Friday, January 11, 2013

devtime widget


The developing time widget seems to work. Here are two pics of the same subject, one developed for 10:25 at 19.5°C, the other for 6:25 at 25.5°C. It would seem that regardless of whether my understanding of the chemistry is right or not, the calculation does produce the right result.

10:25 @ 19.5°C 6:25 @ 25°C

Although there are some differences between the two images, the upper and lower bounds of the density histogram were about the same for both negs. I suspect the differences are mostly to do with the change in the ambient light (there were some fast-moving light clouds that came and went as I was shooting).  

Friday, January 4, 2013

Cloudy Xtol

Tonight I was developing a role of film and having a really hard time getting the second powder to dissolve. Xtol Part A produces a nice brown color when dissolved and this clears when you add Part B. The first batch I made up remained cloudy and brown and I couldn't get Part B to dissolve. After some Googling, I decided to discard that batch and make up a second using warn instead of room temperature water. Same problem. Perhaps I wasn't storing the powders correctly? Could it oxidize in powdered form rather than after mixing? I decided to take a chance and develop the film. Nothing. The entire roll was as empty as if I'd taken all the pictures with the lens cap on. The emulsion was completely transparent, nothing but film base from one end to the other.

Somewhat disheartened I decided to try another roll. I quickly shot 15 frames of 6x4.5 and went back to mix some more developer. No distilled water this time; hot water from the tap. Maybe it wasn't warm enough (though I've never had that problem before, even with water at room temperature). Part A: measure out 8.81g. Part B... then I realized that I'd got the wrong jar. What I thought was Part B was actually fixer! So I'd just fixed the film for 6 minutes and then fixed it again.

Fetching the right jar, I mixed another batch which all dissolved perfectly. The 6x4.5 (4:46 at 29C - the first tentative test of my time temperature calculator) roll has just come out of the fixer and there's something there - so the Xtol's fine!

Going to be interesting to see what I have. 15 shots with complete guesswork on the metering - all exposed at f5.6 with bounced flash. If I get anything I'll be pleasantly surprised...  




And here is one of them (admittedly one of the better ones: some were fairly thin).

This is Puggles, enjoying a late supper.

It's also my first roll of Arista 200. I'll probably use that over the Arista 100 since it appears no more grainy and gives me one more stop.    

Two films

Arista EDU Ultra 100 and Fuji Neopan Acros 100, both developed in Xtol 1+1.

Fuji Neopan Acros 100 Arista EDU Ultra 100