Mysterious Substance in Part C ???

[koraks]

C41 3 rolls of 36 exp Ektar consecutively processed in the same 150ml of developer; yes, there were distinct differences, mostly in acutance.

 

[Photo Engineer]

Possible, but I'm surprised. I would expect a shift in color balance first, but I've not experimented with Ektar.

PE

 

[koraks]

As I recall, roll #1 and roll #2 were quite close although in hindsight things had started drifting a bit already on #2, and #3 was distinctly different. There was also a color shift, but what surprised me was the difference in acutance as I couldn't explain that. It was not a structured test BTW, so that made it difficult to analyze.

 

[Photo Engineer]

Interesting. It is usually a progression in one direction. Did you compensate in development times?

PE

 

[koraks]

Not that I recall, no. Gamma did decrease as well, so that makes sense.

 

[Photo Engineer]

Ok, some of the change you noticed would probably be decreased by a slight change in development time as suggested by EK in their posted chart. That is just OTOMH.

PE

 

[koraks]

Yes, that makes sense. I decided to go for one shot though, to get rid of this sort of variance. I had expected it to be less, so I was kind of surprised at the outcome.

 

[roundcloud]

Sorry, I haven't been here for a long time，my father suddenly go sick seriously.I just came out of the busy.
I'm going to open a new discussion.