I have a few questions about the different compression qualities when saving files to PDF.
Recently I've been designing tabloid sized posters for clients with the aim of having them printed at a digital printshop. I do the bulk of the work in photoshop at 300dpi, then place the file within illustrator and save as a PDF with bleed and cropmarks without any compression. Sometimes these files are well over 50mb, which I then upload to an online file storage site and send the client the link who then takes it to a printer.
When it comes to digital printing, could I compress the files using of the built in compression modes (ZIP, JPEG or JPEG2000) without substantially compromising the quality of the arrk?
I've tested the different compression modes and the image quality options within them and have found that I can greatly reduce the file size and still have arrk that looks great at 100% or more. But will it print as crisp as an uncompressed file?
Also, I'm not sure what the exact differences are between ZIP, JPEG and JPEG2000.
I'm curious to hear what designers and printers would recommend when it comes to sending or receiving print-ready arrk.