Adobe Type 1 Font (PFB)

The Adobe Type I Font (PFB) is a file format that stores Adobe Type 1 fonts. Most Type 1 fonts are single master fonts that permit only style editing; for example, Roman, italic, bold. A single master Type 1 font contains two files: a Printer Font Metrics (PFM) file and a Printer Font Binary (PFB) file.

Some Type 1 fonts are also available in multiple master format. You can customize design elements of multiple master fonts such as weight, width, style, and optical size. A multiple master base font is the multiple master font itself, from which you create variations called multiple master instances. A multiple master base font is composed of a PFM file, a PFB file, and a Multiple Master Metrics (MMM) file. A multiple master instance is composed of a PFM file and a PostScript Printer Stub (PSS) file.

Type 1 fonts are considered outdated in the font industry and have been replaced by TrueType and OpenType formats. It is anticipated that most operating systems will transition to the newer font technologies, thereby phasing out the Type 1 format. To avoid potential text issues in your documents, it is recommended to replace Type 1 fonts with TrueType (TTF) or OpenType (OTF) fonts. For more information, see Reference: Type 1 fonts and Substitute fonts.

Adobe Type 1 Fonts technical notes

• Each exported character constitutes a single object. Before you export multiple objects, you must combine them by clicking Object Combine. You cannot export multiple objects or grouped objects.

Left to right: three objects correctly combined; five objects correctly combined; five objects incorrectly combined