Epson Expression 636 User Manual - TWAIN 32 - Page 104

Printing or display methods The best resolution to use depends on what type of output or printing method you will be using. The usual printing methods for scanned images fall into the following categories: t Black and white printers (laser, inkjet, or dot matrix) are good to excellent for text and line art but are not as good for grayscale images. These printers can be used for reproducing photographs in documents like newsletters that do not require the highest quality. t Electronic color printers use laser, ink jet, or other technologies to produce color or grayscale images that range from coarsely patterned to nearly photographic (often called continuous tone) quality. It is best to see samples from a color printer before you decide to use it. These printers are usually used for small quantities of color images or for preliminary proofs of images that will be printed on a printing press. t Printing presses are for high quality and high volume work. You scan and edit your images and then send the files to a service bureau or printing company, which uses high resolution phototypesetters (also called imagesetters) for high quality text and grayscale images. For full-color images, you scan in color and then use your image editing software to manipulate the image and produce color separation files. If you plan to do this, see the guidelines below on resolution and then follow the instructions in your software manual for making separations. Your service bureau or printing company should also provide helpful information. B-14 Expression 636 Scanner Settings