Re: Saving Greyscale File to PDF

Question

This is a dumb question, but.....if I create a greyscale document in PS, and save it as a PDF, it stays greyscale, right???  
Thank you!!

Answer 1

Noel, pfaffenbichler, and Gernot -- thank you very much for your posts!!!!!  I appreciate your help !
I need the greyscale files to be placed in an InDesign publication, which I am creating.   Some of the greyscale files I create, some are sent to me in various formats (PDF, JPEG, Word, and Publisher files, mostly -- some are professionally created, some are not).  I create files in PS and/or ID (I know, I know, I should use AI, just never got the hang of it).  I prefer to save PS files as PDF's, because PSD's appear to be rasterized in ID (the text is no longer text).  When I receive PDF's from others, and convert them to greyscale in Acrobat, they become very dark, but at least retain the text as text.  If converted in PS, they mostly retain their original look -- BUT, then the text is no longer text!  What is the correct way of converting these files??
I will give more background.....Once a year, I use InDesign to create a booklet which is printed in CMYK, of course.  Last year, many of the black/white pages of the proof booklet had a color tinge to them.  I mentioned this to the printer, and he said he would fix it, which he did.  However, we had to print a handful more booklets, which the printer used my files, not the FIXED files, and the result was icky black & white pages.  This year, I asked the printer what I needed to do to fix this, and he said convert the files to greyscale in Photoshop.  Most of the pages which should be in greyscale, are ads which are sent to me, and I do not have the original; and a few are ads which I have created, therefore have the original files. 
Long story short, I am trying to figure out the best way to be certain my black/white pages do NOT print with a color tinge, and are crisp/clear. 
If you are still reading......everyone, thanks again for the help!!