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Using illustrator to open/save PDFs not recommended even by Adobe itself
Just for the records. Illustrator is not a PDF editor. Read what Dov Isaacs
from Adobe wrote on the pdfzone.com mailing list: FYI, Adobe Illustrator is NOT, repeat NOT, a general-purpose PDF file editor. When you "edit" a page of a PDF file with Illustrator, Illustrator in fact converts the contents to its own internal format (which contrary to urban legend is NOT PDF!). This conversion can be very lossy. The only PDF files that Illustrator can fully successfully "open" are single-page PDF files "saved" from Illustrator itself with the retain editability option selected. Otherwise, Illustrator can and does lose certain PDF objects, convert text encodings, convert colorspaces, etc. When you save such an edited page, Illustrator effectively deletes the old page, and adds a new page in its place. This has several ramifications: (1) The space used by the old page may not be reclaimed and (2) the generated PDF does not share any objects or definitions with content from other pages within the same PDF file, even if it did so prior to the edit. Regards, Thomas |
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