Great video with valuable information for those who print; for me, this is the best of the series so far. Thanks for the reminder of LAB. I remember experimenting with LAB color shortly after the release of Dan Margulis' book. My interest was short lived, as I had neither computing power or patience for the processing time (I was working with 500MB film scans and a computer with 2GB of RAM).
Use of the white background is an excellent tip for evaluating the overall brightness of a print; I might still prefer a neutral gray when working on a file to avoid the brightness of the border, but will change to white before printing.
Great job - thanks.
Tom