OFFICE PRINTING (.tif format)
For documents prepared and printed from laser and inkjet printers in an office environment, a tagged-image file format (.tif) is recommended. Tif files are a bitmapped graphics file format, and are supported by common office publishing  software such as Microsoft® Word® and Microsoft® Publisher®. The .tif files will provide a high quality image. Use the 200 dpi version. The logo is available in black-and-white and cmyk (full color) .tif files for office printing.

INTERNET (.gif)
The .gif (graphic interchange format) should be used only for Internet use due to the limited number of colors and small file sizes. .Gif files are available as rgb (full color) files at 96 dpi.

PRESENTATIONS (.jpg format)
For use in PowerPoint presentations, a joint photographic experts group (.jpg) format is recommended because the file size is smaller than a .tif file. Do not use the .jpg format for office or commercial printing since the resolution is 96 dpi. The logo is available as rgb (full color) .jpg files for presentations. This may also be used as an alternate for the web.

COMMERCIAL PRINTING (.eps or .tif format)
When the logo is to be used for commercial printing, the recommended file format is encapsulated postscript (.eps). An .eps file, a vector-based file, is small but is not size dependent, meaning it can be enlarged and reduced without adversely affecting the quality. (unlike .jpg and .gif files) It is highly compatible with professional graphic arts software such as Quark® Xpress®, Adobe® InDesign® or PageMaker®, as well as the production software used in commercial printers¹ prepress departments. This file format is used primarily on the Macintosh platform. Contact the national office if you need an .eps version emailed to a commercial printer. The logo is available in a cmyk (full color) .eps files for commercial printing.

The 300 dpi .tif versions of the Philly conference logo (black-and-white and full color) can also be used for commercial printing. Please note that the logo should not be enlarged or reduced more than approximately 20 percent.

CMYK (200 dpi, pc .tif files for office and digital printing)
Chicago_2_CMYK_Logo.tif

Optimized RBG (96 dpi jpg files for online use)
Chicago_5_RGB_Logo.jpg
Chicago_3_RGB_Logo.jpg
Chicago_2_RGB_Logo.jpg

These files were opened in Internet Explorer and appeared clean on screen. As you would expect, the two inch version didn't read as well at 96 dpi as at 200 dpi. Still, it would function on a website at that size. Please note these files will have a white background.

Transparent GIF (optimized at 256 colors)
Chicago_5_RGB_Logo.gif
Chicago_3_RGB_Logo.gif
Chicago_2_RGB_Logo.gif

These logos do have transparent backgrounds. However, since the yellow "rays" blend to white, the area at the bottom will appear almost white. This logo will not be attractive against a dark background without modifying the logo specifically for the background. It can be done if needed, but is not my recommendation.

Since jpg files are higher in quality than gif files in images with continuous tones, my recommendation is to use the jpg files for online use.

In addition to these files, available is the FreeHand .eps file for offset printing. Should the committee need this version for a Chicago area printer, it can be sent via email directly to the printer's prepress department.

If needed, a 300 dpi, cmyk file can be provided up to about 8 inches in width. The file would probably be too large to email at that size.