Film Developing (Shooting?) Fiasco

[DF]

My 5 rolls of Pan F Plus , for the first time, came out virtually way underexposed - little if any density - many frames clear! Is it my camera - shutter malfunction or something? PanF+ has been my main film 4 years now, never a problem, shooting/developing. D76 one to-one as usual.
I'm just saddened & shocked for they were of a project that can't be shot again.

 

[Nige]

start by looking at the markings on the film edges. If they are faint or non-existent, most likely a developer issue. If the are good, then probably an under exposure issue.

 

[Gerald C Koch]

start by looking at the markings on the film edges. If they are faint or non-existent, most likely a developer issue. If the are good, then probably an under exposure issue.

This would be good advice for any other film except Pan F. This film has a definite problem with fading of the latent image. This means that the edge markings fade from the time of manufacture. So for Pan F this is not a reliable test.

 

[RobC]

This would be good advice for any other film except Pan F. This film has a definite problem with fading of the latent image. This means that the edge markings fade from the time of manufacture. So for Pan F this is not a reliable test.

Unless of course they are perfectly well defined in this case (i.e. not faded) which would indicate under expsoure.

 

[garysamson]

How much time elapsed between the exposure of the film and processing?

 

[GarageBoy]

+1 on time between exposure and development. 9-10 months after exposure led to thin negs