What Travis has said and described in his post above is exactly what is happening to us here, we are also in an environment where we produce architectural drawings, using Autocad and they contain very fine drawings withing the document which when saved as a PDF and then printed out using chrome directly to the printer not making any changes to the settings they print perfectly visible the fine lines, but if we open the pdf in adobe reader and print directly from there, the fine lines within the section are too faint to see.