If you are a developer, designer, or administrative professional generating documents for others, you can prevent your clients from experiencing the cidfontf1 glitch by following these digital publishing standards:
Click (if using Acrobat) and check the box that says Print As Image .
For system administrators, developers, and designers using tools like FontForge, R, or Zend_Pdf, handling CIDFont+F1 requires a technical understanding of the PDF structure.
If you have ever dug into the raw structure of a PDF file—perhaps to debug a corrupted document, analyze a malformed report, or extract text from a proprietary form—you may have stumbled upon a cryptic line inside the fonts dictionary: . cidfontf1 font new
For East Asian languages (Chinese, Japanese, and Korean—collectively known as CJK), 256 slots are insufficient. , expanding the container index capacity to 65,535 individual glyph slots . Instead of matching characters by name, the system references a numeric Character ID (CID) tied to a defined global character collection database. 2. The Anatomy of the Font Label
While a PDF with cidfontf1 might look perfectly fine on the computer where it was made, sharing that file often exposes several technical flaws:
This is the most direct method if you have access to Adobe Acrobat Pro: If you are a developer, designer, or administrative
The CID-keyed font format relies on two distinct components that work together:
If you are receiving a "new" font error regarding CIDFont+F1, use the following methods to resolve it: 1. Fix the Original PDF Generation
Instead of opening the PDF directly in a vector editor, try this: try this: "Which font is F1?
"Which font is F1? Is it Arial Bold? Tahoma? Copperplate?"
| Issue | Likely cause | Solution | |-------|--------------|----------| | Missing /CIDFont/F1 | Font resource not defined | Add 8 0 R object as above | | Missing /ToUnicode | No Unicode mapping | Add /ToUnicode 10 0 R (CMap stream) | | Glyphs missing | Wrong CIDSystemInfo | Match (Registry, Ordering, Supplement) to font | | PDF error: "Cannot find CIDFont 'F1'" | Font descriptor missing | Create /FontDescriptor with font file stream |
pdf2htmlEX --font-size-multiplier 1.2 --embed-css 1 --embed-font 1 --font-remap "cidfontf1 font new=NotoSansMonoCJKsc-Regular" statement.pdf
If you have a PDF that displays incorrectly due to cidfontf1 encoding, you can often strip away the problematic font metadata by "flattening" the document.
The CIDFontF1 font has a long history dating back to the early days of digital typography. The first version of CIDFontF1 was released in the late 1980s, during the early days of PostScript font technology. At the time, CID fonts were a revolutionary new way of representing typographic characters, allowing for more precise control over font rendering and layout.