Does PE or anyone else have an idea of how long a latent image lasts in hot weather? We just had a record-breaking heat-wave for a couple of days, and below are graphs of test-strips developed (1) just after exposure and just after the XTOL was mixed, and (2) 19 days later. The house has no air-conditioning, so the temperature has been 25-30 most of the time, getting a little above 30 during the heat-wave.
Does that graph look like a latent image that has deteriorated? Notice that the toe has dropped a little. I'm wondering if the latent image has faded, or if the XTOL has weakened. The XTOL was from a completely filled unopened bottle, and my own developers are also delivering lower than expected density, so I'm suspecting the film, but wanted confirmation of this based on the graphs.