underdeveloped neopan 1600@800 D76 1+1

Hello,
I have developed neopan 1600 exposed as 800 in D-76 1+1, 20degrees, 7min (including pouring in and out), agitation first 60sec, and then each 5sec in every 1min. The result: thin negative. What's wrong? The chemistry was fresh, I have also develped TXP 320 D-76 1+1, and it came out perfect as usuall.
Do you think I should use intensifier to improve underdeveloped neopan? It has been exposed correctly
thanks in advance for help

How fresh was the film? The faster the film the faster it ages and gets slower.

I noticed that is the exact time of the MDC. If that is where you got it, you should be treating it as a starting point and adjust accordingly.

Fresh stuff, expiration date June 2012, kept it in the refrigerator

BWT, any recomendations for neopan 1600@800 in rodinal?

Might be a long shot but how long a time was it from out of the refrigerator till exposure? Just thinking out loud.
JOHN

Most of my Neopan work was with Neopan 400, which I had great success pushing to 3200. I mostly used XTol, at that.

I would guess adding an extra minute to your D76 1:1 should give you the density you need.

I would not have a clue with rodinal outside of what MDC suggests.

You might want to give flickr a search, as people tend to post their developer times. It would ball-park you should expect.

First step, of course, is to determine if the negatives are under-exposed, under-developed or both.
Since you probably did not expose a step wedge on a portion of the film, you have a challenging task. One trick is to look at the film leader and check the D-max. You can also try to print them and see how easy they print, maybe they are really Ok.

The way to tell for sure:
1) expose a portion of the film to a step wedge. If the slope is less then about 0.65, then you have under-development.
2) expose a frame to a zone 1 scene. If the density of that frame is less than 0.1 log-d, then you are under-exposing.

JMcLaug351 said:

Might be a long shot but how long a time was it from out of the refrigerator till exposure?

Click to expand...

at least one night

mrred said:

I would guess adding an extra minute to your D76 1:1 should give you the density you need

Click to expand...

In the Neopan 1600 data sheets one can find as follows:
1600@1600 -> D76 1+1 -> 9 min
1600@800 -> D76 1+1 -> 7 min

I have just tried Neopan 1600@800 developed 8min + time for pouring in and out. The negative looks excellent!! Seven minuts is too short