Anti Aliased is a setting that generates gray pixles to smooth out edges on designs for a sharper and smoother look on computer screens. This setting however is not the best when it comes to outputting a physical product. The printers want to read these gray pixels as white which causes solid colors or almost any design to have faded out edges and or white peaking out from the edges of a print.
HOW TO TURN OFF ANTI-ALIASED
COREL VERSION
When removing the anti aliased setting during the exporting process in corel, all you have to do is click the check box to remove the Anti-aliased as shown in the image to the left.
ADOBE ILLUSTRATOR VERSION
When exporting a png in illustrator you have to make sure the anti aliasing setting is labeled as " ART OPTIMIZED (SUPERSAMPLING)". As shown in the image to the left.
