Blair recommendations for resolution:
Any raster image needs to be 200dpi at full size to print properly. Any higher resolution will increase file size as well as RIP (Raster Image Processing) time.

When you think about resolution requirements, it may help to remember the difference between Raster images and Vector images.

• Raster images are pixelated for continuous tone.

• Vector images are not pixelated at any depth and produce crisp, clean lines for type setting and other finite projects.