Using the proper file formats for internet and print can mean the difference between a having a professional-looking printed document and one that looks blurry or is missing graphics. Graphic file formats for the Internet and offset printing are totally different animals. Do not interchange them! Graphics for the Internet Low-resolution raster graphics are used on the Internet. These graphics are made up of thousands of pixels (squares of color). Internet browsers will read JPG and GIF graphics, which are best scanned or sized at 72 PPI (pixels per inch). Because of the limits of screen resolution, anything greater will…
Here’s how to scan photos to get the best resolution from your desktop scanner. First, I’ll explain some of the basics and terminology and then I’ll provide a handy table for reference at the end of this post. Halftones and Lines per Inch (LPI) In graphics arts terminology, a photograph from your camera is called a “continuous tone” image. Printing presses require a continuous tone image to be converted into a “halftone.” A halftone is created by placing a “screen” made of thousands of dots on the photo and taking a “picture” of it. Nowadays, this screening process happens using computer…