
This becomes a problem for printing because the commercial printing software can become easily confused about which encoding of the font to use.

How can you prevent multiple subset embedding?There are several ways that PDFs can end up with one or more of its fonts embedded multiple times. Forcing that embedding can be a challenge. Adobe products and many others assume a set of "built-in" fonts will be available and therefore tend to not embed those. What are the requirements of PDFs?All fonts (full font family) in the PDF must be embedded. In spite of selecting settings to embed all fonts, this method may leave some fonts not embedded. It is a good way to make many PDFs but it does not offer all of the variety of settings that manually doing the two steps does. It is two steps but the transfer to Distiller for PDF conversion is automatic and hidden from sight. When you print to Distiller an intermediate postscript file is produced and that file is automatically passed to Distiller for conversion into a PDF. The Adobe PDF application Distiller can also function as a printer driver. Caution: It can be useful for text-only PDFs but it does not produce PDFs of the same quality, especially for embedded images, as does Distiller. It creates this PDF directly, without first going through a postscript stage. Instead of printing it creates a PDF file. PDFWriter acts like a printer driver that can be selected from application print menus. Various versions of Adobe Acrobat come with an application called PDFWriter. Finding the settings that will cause font embedding is often a challenge. Caution: This method is handy and seems easy but the PDFs often fail to embed all fonts. Installing Acrobat also installs PDF creation buttons in some applications-notably Microsoft Word.

Acrobat is actually a set of Adobe products to produce and manipulate PDFs. Acrobat FAQ How do you make a PDF with Adobe Acrobat?The gold standard for PDF creation is Adobe's Acrobat software.
