F4 F5 F6 — Cidfont-f1 F2 F3

The PDF viewer can see the "shapes" of the letters but doesn't technically know which font they belong to. Common "F-Number" Identifications

If you are on a Mac, the default app can sometimes bypass this issue. Open the PDF in Preview . Go to File -> Export as PDF .

Need further help? Export a sample PDF containing Cidfont-f1 and inspect it with pdffonts -v or open a support ticket with your RIP manufacturer (e.g., EFI, Xitron, or Caldera). Do not ignore these generic names — they are silent sources of output inconsistency. Cidfont-f1 F2 F3 F4 F5 F6

| Problem | Likely Cause | Solution | | :--- | :--- | :--- | | | Cidfont-f1 does not contain the correct glyph range. | Install proper native CID fonts (e.g., Source Han Sans) and remap via cidfmap . | | Printer shows "Cidfont-f4 not found" | RIP expects font in Slot 4, but memory is cleared. | Re-upload the original CID font file to Slot 4 via printer's web admin. | | PDF/A validation fails | Generic fallback name is not embedded per ISO 19005. | Replace with a permanent, embedded TrueType/OpenType font. | | Ghostscript substitution errors | lib/cidfmap is missing or malformed. | Add line: /Cidfont-f2 /NotoSansCJK-Regular ; |

Adobe’s or Source Han Serif (available for free on GitHub) is ideal. It covers Japan1, GB1, CNS1, and Korea1. The PDF viewer can see the "shapes" of

If you’ve encountered error messages like or noticed these names in your PDF properties, you are dealing with a common but often misunderstood technical artifact of digital document creation.

Points to the specific font styles used in the document (e.g., f1 for bold headers, f2 for body text, f3 for italics). Why Do These Font Errors Happen? Go to File -> Export as PDF

The strings are technical placeholders used by digital document software, primarily Adobe Acrobat and Illustrator, to identify fonts that were not properly embedded when a PDF was created. Understanding CID Fonts in Digital Documents

: Usually other variations (Italic, Bold Italic) or secondary fonts used in the document like Myriad Pro How to Fix or Identify the "Paper" Content

Understanding Cidfont-f1, F2, F3, F4, F5, and F6: Causes, Fixes, and Explanations