I'd say you might consult with your printer on whether you need to scale the images or not. Some are more picky than others about what the minimum and maximum allowable scaling are for their device.

A

Anonymous

Oh, and you don't necessarily need to adjust the image if it's more than 300 ppi. There may be reasons to shrink your images in Photoshop (eg. running out of disk space, printer requests it, etc.), but there's generally no need to.

A

Anonymous

"Actual" ppi is the resolution of the image at 100% size, as set in Photoshop.

"Effective" ppi is the resolution of the image at the size it's been scaled to in InDesign.

For example, a 300 ppi image, if scaled 50% in InDesign, is actually 600 ppi when reduced to that size. Make sense?

H

hlwaddell

Participant

What can you do if an image has an actual ppi of 300 but an effective ppi of say 115 - 240? At what level will it be safe for commercial printing?

Peter Spier

Community Expert

240 effective ppi is probably adequate for almost any commercial printing other than fine art reproduction. 115 could be pushing your luck, but there are so many variables that it's impossible to say anything absolute. What is the intended use and the intended viewing distance? What's the printing method?

You might want to take a look at http://forums.adobe.com/message/2042202#2042202

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