I thought i'd write up my initial take on comparing Negative1's two recent Star Wars Pan&Scan Laserdiscs preservations which he kindly posted up the CED (FOX+CBS) and the Extended Play CLV PS 1130-80. I compared these with two done by Dark Jedi - Standard Play CAV and 5651-80, which Darth Mallwalker had posted.

All this has probably been catalogued and discussed with much better understanding but I thought I would post my quick take and hope people with the knowledge at their fingertips can correct me 100x quicker than me going through lots of threads.

The 5651-80 P&S laserdisc is from the same film print as used for the Japanese Special Collection[?]. My sense through looking at the Senator Theatre stills and cross-referencing it with outtake scenes from Empire of Dreams is that this master/print retains the most clear record/cluster of the colour structure of the original, that it hasn't been shifted away to the same degree as the other prints/masters. I don't have any understanding of colour theory or in which order/pattern colours fade or how color correction is done - this is just based on my sense of it.

The CED, and Standard and Extended Plays Laserdiscs seem to all be from the same print. This print seems to have the early stages of a green/yellow shift like the one which is much worse in
this picture of the man riding a horse:

https://www.familysearch.org/techtips/2011/12/editing-software-techniques-for-old-photographs

My sense is that if this green/yellow haze thats over this version could be reversed it would look better, and more comparable to the 5651-80/JSC. What makes me think one move might do this is that the Binary Sunset in the CED+S+EPLAYS matchs the binary sunset in the faded 8mm derann still on the savestarwars goutcorrect page, suggesting there was a similar fade happening in two distinct prints (?)

The Laserdiscs from 1993 + Gout all seem to be a different film print again but have been put through a blue filter, so that everything is darker. My sense is if the blue filter could be undone then it would be easier to compare next to the earlier laserdiscs?

It seems like the early laserdiscs then have no colour correction done but whats happened is purely the result of organic change? Maybe if someone could understand the order and pattern in which the film colours bleed they could reverse engineer back to an approximation of the Senator Print. This seems to be what zombie84, Harmy, You_Too, Lee Thorogood, are all doing by different methods but I wonder if one single colour correction could work on the earliest laserdiscs also.

Please jump in and set me straight on anything or everything i'm getting wrong. I haven't really done my homework or studied the differences in great detail , i'm hoping for any helpful pointers.