Is there a freely available (preferably open source) tool or library for PDF conversion to black and white?
Some customers want to print generated PDF documents in B&W to save toner. Unfortunately I cannot generate PDF in B&W directly, since we are merging two PDF pages together, one being official not available in B&W.
Update: To be more specific, I am looking for automatic solution, i.e. tool that is callable from a program.
With PrimoPDF (http://www.primopdf.com/index.aspx) you should be able to set to generate a “Black & White” pdf.
“Printing Preferences” -> “Paper/Quality” tab, then you can choose between “Black & White” and “Color.
Regards
Thomas