Greyscale / RGB

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  • tank02

    Hey Guys,

    I'm finishing up a book. And for most of its color images. So I leave them in RGB and than convert to Iso coated ECI 300 via Indesign. As the printer requested.

    I also have some Images in greyscale. They are now in RGB. Should I convert them first in photoshop to greyscale or leave them in RGB, I exported them via Lightroom with an Ilford preset hence the reason why they are in RBG.


  • jaylarson0

    I recommend converting in either app using filters to you can have additional contrast—otherwise it's just shades of blah blah gray. having some pure blacks and very-near whites will add to the images

  • Gnash2

    even if you convert to greyscale in PS when you output the pdf with that ICC profile it will be converted to a CMYK anyway. So you make as well leave it RGB if you're happy with the way it looks.

    A CMYK greyscale will give you richer tones when printed so it's better if you have that option. The only thing you need to mindful of is a colour-cast when it's being printed. But that's the printer's job to watch

    • make = mayGnash
    • Aye. Thanks matetank02
    • thismonospaced
    • i wouln't leave CMYK conversion to indesign, used to convert in ps, proper color profile, and save a hq tiff what will be placed in indesign.sted
    • and how about using cmyk->duotone conversion and export as eps K only? :) because I can tell the difference between a CMKY printed photo and a proper grayscalested
    • It's always best to follow the printers' advice. if an issue developes he'll just blame your conversionGnash
    • ouh ouh ouh ouh ouhmekk
    • Sted, I always do color conversion in indesign. I'm also a photographer, and work for alot of magazine, they always ask the rgb to a batch conversion in ->tank02
    • Indesign so you have good seperations preview in combo with the required ICC profile.tank02
    • ^^ yupGnash
    • indesign was known for the shitty colorspace conversion for many years, it's just an other way, you can still do separated cmky docs for checking, that doesn'tsted
    • depends on the source :)sted
    • it's actually acrobat that doing the conversion. But you're right, I do my own in PS. the only exception is when the printer asks for a specific workflowGnash
  • utopian0

    Do not rely on the printer's pressman or conversion software to retain your greyscale profiles.

    • because they are always drunk ;)sted
    • Thanks for giving me 'printers' stress again. The reason why I colourproof EVERYTHING. I got a Epson SCP-800
      that can proof.
    • ah that's a nice 8c with those special vivid inks. try out what i explained above and you will see what's the difference between 4c and 1c processed graysted
    • if that epson isn't set up properly you're in for a world of pain. there's no way a litho cmyk press can match the 8c gamuthans_glib
    • the only proofs worth a damn are machine proofs from the printer.hans_glib