Images and graphics may look good on screen, but not when printed. Pixelation can give a ‘blocky’ look. The reason is that a screen will display a document at 72-100 dpi. Dpi (or ppi) stands for dots per inch or pixels per inch When printed, you will see 300dpi. Zoom in 400% to view a PDF and you will have an idea of the unwanted detail!
72dpi text on the left hand side will appear distorted when printed, while the 300dpi example will appear clear.
This problem can be solved by changing the options given when saving to a pdf or jpg image. The resolution options should always be set to a minimum of 300dpi. Compression options should be set to maximum.
An image made from dots is called a raster image. Another format, called vectors, will never distort at any size.
If you require any more information about your printing, please call us for a resolution to your problem!