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I am using Illustrator CC and I need to create a large image document 85cm X 200cm, but the printing guy is asking me this document to be in 700dpi. How can I set, emulate or create this within Illustrator? Illustrator only allows me to create 72dpi, 150dpi, or 300dpi.

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Are you sure it's not PPI (Pixels Per Inch) rather than DPI (Dots Per Inch)? –  Mr E. Upvoter Oct 10 '13 at 18:06
    
Yes, 700 dots per inch. –  Pablo Chávez Oct 10 '13 at 18:34
    
Why have you marked an answer about PPI correct then? :/ –  Mr E. Upvoter Oct 10 '13 at 18:41
    
It can not be DPI.. it must be PPI. DPI is on the printed page and has nothing to do with working on a monitor. PPI is the pixel resolution on screen. Even though your "printing guy" may have mentioned "dpi" he most likely meant "ppi". –  Scott Oct 11 '13 at 20:04
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2 Answers

up vote 1 down vote accepted

85cm x 200cm is 33.4646in x 78.7402in. To set it at 700ppi (pixels per inch) you need to multiply that by 700, so your document should be: 23425px x 55118px, independent of whatever ppi you choose in Illustrator.

That is a LOT of pixels, particularly because illustrator outputs a vector file that is 100% scalable (unless you are using raster images within). 700ppi is overkill for a sign of that dimensions imho, you could easily get away with 150ppi, or even 70ppi.

Regardless, you may be better creating your file at 1/10 scale - 70ppi is a much more manageable 2343px x 5512px.

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PPI and DPI are 2 different things. Here is some reference that should help explain: photo.stackexchange.com/questions/4779/… –  John Oct 10 '13 at 19:23
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John answered if you are concerned about raster images within Illustrator.

However, I wanted to point out that Illustrator - being a vector based application - is resolution independent. This means there is no ppi/dpi setting. Vector content has no ppi/dpi it scales infinitely without issue. PPI/DPI is for raster-based images where scaling can vastly alter the quality of the image.

If I were given those specifications and I was working in Illustrator I'd simply set the Document Raster Effects Settings (DRES) found in the Effects Menu to 700, then ignore PPI/DPI for all content created in Illustrator. DRES controls the PPI of any raster effects created within Illustrator (drop shadows, glows, etc). It does not alter placed raster images. If you are placing raster images within Illustrator, then you need to ensure those raster images are set to 700ppi in a raster editing application such as Photoshop. You can't alter a raster image's native ppi from within Illustrator.

In short, you don't need to worry about ppi with Illustrator. That's the entire point of vector content.

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