RGB CMYK LAB and Dan Margulis !

[Quantum3]

Originally Posted by Markzebra

Yeah you have to be very careful with LAB, its very destructive if you use it on 8 bit images and convert those straight back and forth. This process compresses the color information into a very small area of the A and B channels. One way to minimise this damage is to convert your image to 16 bit then convert to LAB, do your edits and convert back. Another point that Margulis for some reason took many years acknowledge, is that a lot of the edits achievable in LAB can be done on the original RGB or CMYK document using Blend modes and luminosity/colour calculations. Its not always necessary to damage your file by converting to a different mode.

Margulis is a great teacher, but he has never been great a technician and the folks at Abode have had a few problems over the years with this

Hey Mark, I was missing your comments. What are you doing lately?

[katheo]

Thanks mistermonday for your help. I will do the conversion back to RGB before each print. And, I will resample down to 240 and see whether I notice any difference in the printout.