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File Format Guide

Print-ready files are accepted in the following formats:

 

File Extensions Description/Program Used
.ai, Adobe Illustrator drawing or vector graphics file
.eps Encapsulated postscript image file created using Adobe Illustrator;
standard file format for importing and exporting PostScript files
.cdr Corel Draw Vector drawing file
.tiff Tag Image File Format; prefeeeed bitmap graphic for high-resolution postscript printing
.jpg or .jpeg standard format photographic image compression developed by the
Joint Photographic Experts Group
.psd Bitmap file created using Adobe Photoshop
.indd Indesign Document from Adobe Systems
.pdf Protable Document File from Adobe Acrobat
.qxd QuarkXpress Document or Data File
.pub Document file associated with Microsoft Publisher

Quick Facts about Bitmap Images

  • Bitmap images are made up of colored dots(pixels)in a grid.
  • Also known as raster images.
  • Resolution dependent-resizing affects image quality.
  • Scanned images and digital photos are bitmaps.

 

Quick Facts about Vector Images

  • Vector Images are made up of individual objects composed of lines and shapes with different attributes such as color.
  • Resolution Independent-scaling images does not affect quality.
  • Smaller file size.
  • Not suitable for photo-realistic reproduction.
  • Fonts are vector objects.

 

Guide to Image Resolution

Resolution refers to the number of colored dots or pixels that make up an image.
It is commonly expressed in dpi or dots per inch.

Resolution Rules-of-thumb:

  • The higher the dpi, the greater the resolution, the better the image quality. But don't go overboard. Higher resolution images create larger file size.
  • Image resolution is directly and inversely proportional to an image's physical size.
    When you increase the resolution of an image, reduce its size. When you enlarge an image, lower the resolution. Otherwise, the image will print poorly.
  • For printed images, the ideal resolution is 300 dpi for images and 400 dpi for text at the final printed size.

Here is a chart to help you determine the proper dimensions of your image at your desired print size and in the recommended resolution of 300 dpi.

 

Printed Size Min.Image Dimensions Image Resolution
2"x 1.60" 640 x 480 pixels 300 dpi
2" x 2" 600 x 600 pixels 300 dpi
2.67" x 2" 800 x 600 pixels 300 dpi
2" x 3" 400 x 600 pixels 300 dpi
3.41" x 2.56" 1024 x 768 pixels 300 dpi
4.27" x 3.20" 1280 x 960 pixels 300 dpi
4" x 4" 1200 x 1200 pixels 300 dpi
4" x 6" 800 x 600 pixels 300 dpi
5.33" x 4.00" 1600 x 1200 pixels 300 dpi
5"x 7" 1000 x 1400 pixels 300 dpi
8" x 5.33" 2400 x 1600 pixels 300 dpi
8" x 10" 1600 x 2000 pixels 300 dpi
8.5" x 11" 2550 x 3300 pixels 300 dpi

More Helpful Tips

  • You screen resolution doesn't accurately reflect your image resolution because monitor displays usually have about 72 to 116 ppi.
    To view print sesolution of your image,zoom in up to 300~400%.
  • When taking pictures from a digital camera for you print project, it's best to set your camera to the highest resolution setting.
  • Four-Color Process Printing uses the CMYK color mode. Convert RGB images to CMYK using graphics editing software such as Adobe Photoshop.
  • Save your images in a lossless file format such as.tif and .eps to maintain accuracy and quality.

 

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