The pages for my new book were created in Adobe Illustrator CS2. Illustrator doesn't use DPI from what I read online. They have PPI in CS3 however I don't have this program. I have photoshop too. What is the easiet way to up my resolution to 300 DPI? Should I cut & Paste the files into new photoshop files set at 300? Any ideas would be greatly appreciated. Thank you!
Illustrator is a vector program, and therefore doesn't use DPI/PPI until you export it to a bitmap-type file such as JPG.
If you have created your artwork solely in Illustrator then it should be scalable, and is also scalable when saved to EPS or PDF formats. However, if you have imported photos (or other bitmaps) into Illustrator, the artwork will no longer be scalable without compromising the quality.
Also, photos must be 300dpi before you import them into Illustrator. When you save/export, the PDF will automatically be saved at 300dpi, provided that all elements used are also 300dpi.
When you save, make sure the page properties accurately reflect your book pages, allowing for bleed if you need it. The resulting PDF dimensions will be exactly what you set the page dimensions to be.
Thanks for the info on illustrator. There are no photos in the book - everything was hand-drawn and scalable. I saved each file as a PDF and was told that my files were 72 DPI - not sure how that is possible with a vector file? I'm wondering if since my files are all in vector - saved as PDF - if they will print clearly OR should I export each file into photoshop, set the DPI as 300, flatten each file and re-save as a pdf. Has anyone else created a book in AI (w/out photos) and received a message about the files DPI being low - set at 72 DPI? Thanks again!!
I'd be tempted to proceed with the proof despite the so-called 72dpi message, but then for peace of mind it might just be better to do as you described and import to Photoshop and convert it there.
When you compile all your individual Illustrator PDFs into one file (I'll assume in Acrobat) are you then saving as Press Quality or High Quality PDF? That last step may be compressing your final PDF.
I have never created the interior of a book in Illustrator, but I did create the cover of my second POD book with that program. I have to say that I didn't receive a message alerting me that it was 72 dpi. Perhaps you could write to customer service and ask them about this. I once contacted them about a message regarding the resolution and it turned out that I received the message in error. Maybe that was the case for you too.
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The problem has been fixed. When I combined the file in illustrator, the default was low-res. This was NOT obvious - and not an option one selects when combining files - the buttons for setting the resolution are located at the bottom right of the program (not in the toolbar). In any rate, once I fixed this and re-submitted the files, the title was approved. The first proof came last week and looked great. I made a couple alignment changes and re-submitted. I look forward to receiving the new proof and thank everyone for all the advice! :) I truly appreciate it.