Platinum Printer Member
- May 29, 2007
- Reaction score
- Ghent, Belgium
- Printer Model
- 2xEpson P800, WF-7515, W-F7525
Did you try to put LLK in the GO overprint. I think this would mimic the real situation with both the P800/P700, as these printers don't use GO, but LLK instead ?I'm just showing in my above table the luminance levels L* of the black patches of the various ink/paper combinations w/o and with a GO overprint.
I have supplemented the table here with the complete Lab values to adddress another aspect - the color - the tint of these black patches - how neutral are these black inks actually
_____________Sihl/Aldi______Netbit/Aldi____HP Premium Plus
Epson P700_____5,25/---______7,80/ 9,23_____ 8,28/ 7,02 L
Epson P800_____2,69/---______3,80/ 6,23______4,27/ 3,65 L
Canon PFI105___2,28/---______8,79/ 5,51______6,92/ 4,82 L
You can see that the b value -b into the green direction - varies between -5.5 and -0,07 for the various ink and paper combinations - with or w/o GO. Not all of that is visible as a tint but the prints with a b=-5.5 or -5 look slightly cooler than the other black patches in direct comparison. This just applies to the pure black patches - I'm not measuring and comparing gray patches here or with other printers, printers with light gray inks and a ABW mode may deliver rather different results, probably interesting but I don't have such printers and inks available.