InDesign Color Management with BW photos

[graphicartsgirl1]

I am ready to send a book to print. It includes many high resolution BW photos. The photos are Greyscale PSDs and are linked to the document. When I go to package it it says that CMS is on and it is in CMYK mode. There is no greyscale option, so do I A)Leave it the way it is? B) turn off the CMS? and if so, C) do I need to turn of the CMS on each photo individually or just in the document? D) none of the above?

I am on a deadline with this so any help would be fantastic. Thanks.

[budafist]

When you go and have a look at your separations, are your images only on the black sep?

[graphicartsgirl1]

There is only 1 channel and it says "Gray".

[graphicartsgirl1]

I am wondering if it would be better to convert the images to CMYK in Photoshop and then relink them? Would that give us a better print in the book? The book is being printed only in BW

[urstwile]

No, don't do that. Leave them in grayscale. Converting them to CMYK will spread the color info across 4 channels, and outputting them that way means that you'll be interpolating grayscale from 4 colors rather than just 1, which could have less than desirable results. If they look good in grayscale, and you're only using one ink, adding more channels won't help things.

[steve2112]

Is your printer postscript. I t might not be able to deal with certain things if it isnt

steve

[Tiffany Pilgrim]

I think it is OK to check the CMYK option when packaging it. Because it is still technically CMYK. Just with nothing on the CMY channels.

graphicartsgirl1, do a little test for yourself. Export your current book as a high res pdf x-1a. Then open it in Acrobat professional. Under advanced there should be something called output preview. Use this little box that opens to make sure that everything on your book is on the key/black layer only. If it is. Looks like everything should be OK.

Ask your printer if you should have any color profile attached. I usually work with no profiles/color management on and then I might apply them later if I need them. If no color profile you might have to remove them from all your images and your ID document.

-T