Let’s say you’re designing and typesetting a book with lots of images. You’ve finished laying out all the pages, and your last task is to prepare the images for print. All of your images have either been scanned or photographed, and therefore they are all RGB color (not CMYK color, as required by most offset printers). And most images are JPGs, although you might have a few PNGs too.
It’s a monumental task to convert each image to CMYK individually. Suppose you have 50+ images, or even 1,500+ images! I found myself in this situation recently, and want to share with you a quick and easy way to convert all of your images to CMYK at once by batch processing actions in Photoshop. (It sounds complicated, but isn’t.) [Read more…]
How can you determine whether an image file is high enough resolution to use in your book? That’s a question I get asked all the time! Images should be at least 300 ppi (pixels per inch) at the size they’ll be printed at— and that’s where most people need help. How do you figure out the size of an image, and whether or not it’s suitable for printing? 
