Hello, I've been printing digitally so long, I don't know how to do indesign files for offset plates! I have exported my PDF, but now in the seperation preview, my black isn't very black, and the places where I have transparency or the black on top of other colored objects, the objects beneath show through! I know that offset printing doesn't like transparencies, but I thought that exporting the PDF would flatten it so that the CMY plates didn't get any information where the black overlays it (like big black text on top of a photographic image). But instead, it does output the CMY colors beneath the black areas, so when it prints the black plate on top of it finally, you can see the colors underneath. Does this make sense? It doesn't flatten the final PDF and knock out the areas where black occludes the rest of the CMY areas. If I go through in Indesign and change my black(K) things to Registration, it solves the problem, but then that means that the CMY plates then ALL print 100% and then the black plate prints 100% as well... and I don't think that is right. So, what do I do? I tried exporting it as the oldest, flattest PDF preset that indesign does, and it still has the problem. I've Googled "flattening PDF's from indesign" but can't seem to get the answer I want. Does all of this make sense to anyone who has had to output stuff for offset CMYK printing?