Defending the 72-dpi "myth"

To wrap up our discussion of image preparation, here's a few thoughts on resolution.

Let's keep this simple, shall we?

For the Web, your image should be 72 dpi*

For color or grayscale images, your image should be no lower than 300 ppi

For b&w lineart (with no tones), your image should be no lower than 600 dpi

*or ppi... they're interchangeable

You will probably come across someone who wants to tell you that 72 dpi is a myth. They'll say "You don't have to prep an image file at 72-dpi for the Web." 

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