Convert Color PDF to Black and White Using A-PDF to BlackWhite

From: http://a-pdf.com/faq/is-there-a-powerful-solution-available-for-pdf-conversion-to-black-and-white.htm

Here we will provide you a wonderful solution to convert color PDF into black and white PDF files. That’s A-PDF Black and White http://www.a-pdf.com/bw/index.htm