As we frequently get questions about files types from customers and friends. I wanted to share a quick primer prepared by one of my teammates:
An EPS (Encapsulated PostScript) is a vector-based, high-resolution file that can be re-sized (enlarged or reduced) without losing detail. It is the standard file format for printing and is the file you will need to produce your printed materials. Opening an EPS requires special software, so you may not be able to view your EPS onscreen. Adobe Illustrator, Macromedia Freehand and Coral Draw are common programs to open and edit your logo. To display but not edit, you may use Microsoft word by placing the graphic into word.
NOTE: Just because your EPS file displays poorly onscreen does not mean it will print badly.
An EPS is commonly prepared in CMYK mode or if specifically requested, a PMS (Pantone® Matching System) color will be used for spot color printing. This is what your printer will need for printing. Your printer can match a CMYK color to a PMS (Pantone® Matching System) color if you prefer but there is no guarantee of 100% accuracy.
A JPEG (Joint Photographic Experts Group) is a compressed image file used on the internet and ready for your website. It is meant to be displayed on screen and is not meant for printing. A JPEG is a smaller resolution file than an EPS and cannot be enlarged without losing design detail. Best not use for print as the quality may appear blurred or jagged (“bit-mapped”).
NOTE: Just because your JPEG file looks good onscreen does not mean it will print well.
A JPEG is created in RGB mode. This is the format you can use for your website.