C41 Negative

Abutate · Aug 19, 2016

I use paterson tank and load film in dark double zipped changing bag. unless zips has leak i dont think its over-developed. it was 120 seconds at 45 degrees, as per digibase c41 rapid instructions.

Abutate · Aug 19, 2016

I am really annoyed after so much of hardwork there seem to be no to little progress

Photo Engineer · Aug 19, 2016

Some of these problems are so hard to diagnose at a distance. Sorry.

PE

pentaxuser · Aug 20, 2016

The picture of the baby looks fine except at the edges so I fail to see how it can be a home chemical processing fault that processes some of the frame Ok but not other bits of the frame. It looks as if it is more likely to be the kind of issue that PE has mentioned but try two fresh films, process one at home and send the second to a lab and then check to see if there are differences. That at least will establish if there is something wrong with your processing from loading onwards.

pentaxuser

Abutate · Aug 23, 2016

Thanks mate, Another one here, Could someone tell me what has happened here?

Photo Engineer · Aug 23, 2016

It appears that the front of the film made contact with either the processing tank or the back of the film roll and prevented the developer from acting on the film. It may include lack of bleaching, fixing, washing and stabilizing.

PE

Abutate · Aug 23, 2016

Thank you sir, had two rolls in same tank, one is perfect, second was this

mnemosyne · Aug 26, 2016

Looks/sounds like insufficent solution volume in development and bleaching/fixing stage. Have you noticed and observed the minimum volume requirement for the Paterson tank? It should be typically something around 500-600 ml of solution for two 35mm films with inversion.

Abutate · Sep 11, 2016

Many thanks, every day is learning process that i go through things are improving.

Can you guys confirm that Fix for Black & White can be used on C41 film too?

Thanks

Photo Engineer · Sep 11, 2016

NO. Fix for color can be used for B&W but fix for B&W should not be used for color.

PE

Abutate · Sep 11, 2016

Many thanks PE!!

I have read Post about jobo tank temperature but cant really understand it. My Tank bath temp stays at 38 degrees, however when i pour developer out its at 35 degrees.

Abutate · Sep 11, 2016

I use Jobo duolab!

Photo Engineer · Sep 12, 2016

The temperature difference is because the drum, reels, and film are cooler than 38C. That is why a prewet at 38C is recommended.

PE

Abutate · Sep 12, 2016

Thanks, Pre-wet for how many minutes? Just let it sit in 38 degree water for few mins or how does it work?
Please ignore my ignorance.

Thanks

Photo Engineer · Sep 12, 2016

There is a whole thread on prewet. I use 1 minute at 38C (100F) for 1 minute before developing. I use 1 change at this temp at 30 seconds.

PE

mshchem · Sep 14, 2016

Abutate said:
I use Jobo duolab!

I use a Duolab when I just have a roll or two. Great little machine. I really make sure to warm tank up with a couple pre rinses. I have a CPP2 with a lift it's great, but for small volumes of roll film Duolab makes quick work of it.
Best Regards Mike

Abutate · Oct 9, 2016

Thanks Mike, Yes i do certainly i have problem maintaining the temp and relying on pre-rinses! just getting used to it. yes its excellent small machine and i came across a brand new one lately. yes fully packed brandnew one.

C41 Negative

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