Couldn't yield much result searching on this subject,
appreciate if anyone have experience to share.
I just started using my Made In Japan Panasonic BD-R (MEI T01 001).
On the very first disc, i did 1 Q-Scan after burned, which yield very good result.
LDC: Ave = 0.78, Peak = 249.
BIS: Ave = 0.02, Peak = 5.
After printing, (i printed 2 lines of title, date & a BD logo)
i re-scan again and notice that the Q-Scan started to increase significantly as the scan approach the edge.
I re-scan several times with similar result.
When i did a TRT at 8x, the graph start to swing when it approach the edge. TRT at 6x looks ok though.
With this, i was beginning to suspect the printing may cause degradation.
Another possibility is that the burn wasn't good, and somehow the first and only Q-Scan did not catch the problem before printing.
I tried a 2nd disc (same code but burned with diff data).
This time, i made severals Q-Scan after burn but before printing.
After i printed the disc today, i perform another Q-Scan.
The pre-print scan was very consistent,
but after the printing, i see a small but obvious jump in the Q-Scan.
Results before printing
LDC: Ave = 1.22 to 1.35, Peak = 151 to 151.(no chg)
BIS: Ave = 0.02 to 0.03, Peak = 3 to 3.(no chg)
Result after printing
LDC: Ave = 1.67, Peak = 286.
BIS: Ave = 0.03, Peak = 6.
Appreciate if you have any personal experience to share.