Gray scale output using pdflatex

Question

I use colour diagrams (saved as pdf files) which I include in my LaTeX file. Is there any options in pdflatex to create a gray scale document or a pdf viewer where you can view the document in gray scale?

Enabling you to view the document and fix any problems before it gets printed on a non-colour printer.

Answer 1

No. None of the TeX engines (pdftex, XeTeX, LuaTeX) allows color correction of included images. The best you can do is set all colors generated in your document to gray scale.