Open the PDF in Acrobat and go to File > Save as Other > Press-Ready PDF (PDF/ X)
Create high-resolution print-ready PDFs using Acrobat
Standard PDFs are not print-ready. They may have poor quality images and colors, which may not print correctly or print at a very low quality. You can use Acrobat Pro to create high-resolution print-ready PDFs from your standard PDFs.
It’s always good to create a high-resolution print-ready PDF directly from the application in which you create the source file.
Follow the steps below to create a high-resolution PDF from your existing PDF using Acrobat.
In the Save As PDF dialog box, click on Settings
In the Preflight dialog, select Save as PDF/X-4 and Click OKNote:
You can select the available PDF/X-4 conversion profiles listed in the Create PDF/X-4 according to the following PDF/X-4 conversion profile section. Apply corrections as per your requirement.