QUOTE (James Sorenson @ Jun 8 2016, 01:31 PM)
I would have thought the pattern would be printed on some sort of backing surface with then a uniform adhesive on the back, which is not what we are seeing if that was the case.
I really enjoy a good detective story
So I throw a possible clue onto the table (just for fun)...
I looked at the Photo-Journal page for PIA14131
which make reference to a 'space simulation chamber at JPL'
Google pointed me to the actual chamber used LINK
which even has a photo of Curi in the chamber before the doors were closed.
The chamber contains a large 'collimating mirror' on the seiling that collects light from 37 xenon arc lamps installed in a 'solar basement,' and focuses the light onto a test subject. Each of the lamps are 20 to 25-kilowatts depending on which reference I found... the other link to the test chamber (Chamber 25 Space Simulator, Building 150) LINK
So, returning to Jame's comment about one piece labels with a uniform adhesive / UV darkening etc.
Xenon arc lamps produce a lot of light and a lot of UV, maybe enough to alter the backing adhesive of the temporary fiducial targets on the port covers. But why the different effects leaving our matching pattern behind? Possibly the intense UV from the xenon lamps passed through the black and white fiducial marks differently, one section being masked? Maybe this resulted in some change in sections of the uniform adhesive where some was altered or baked onto the surface?
Just another 2 cents towards this discussion