I know this question has been asked before but I could not figure out a solution.
I am having a bumper sticker printed in mass quantities and need some urgent help. The sticker is black with with large white text. My problem started when I exported my ai file to a PDF and the black came out gray. I then exported as a jpeg and found the same grey result. After searching online I found that pure black is not 100K, and it seems to be a mixture of all the CMYK colors. Well I adjusted the colors to make a rich black blend and when I saved it as a jpeg the black displayed as intended. However when i exported the same ai file as a PDF the black still looks grey. Any ideas whats going wrong with the PDF? Will the pdf print pure black even though it doesnt display that way on screen?