Creating a New Document
If your artwork has images or design elements that extend to the edge of the artboar, you must allow bleed in your file.
When using a border in your artwork, it is essential that your design uses at least a 1/4" of white space between the artboard's edge and any design elements or type that does not bleed.
All text within the file must be converted to outlines with teh outline set to zero to elminate the need for fonts.
Make sure the Link checkbox is checked (include linked images when sending us your files).
Before you add an image in Illustrator, it has to be converted to CMYK mode and its resolution should be no less than 300 DPI.
For an image to print properly, it must be at least 300 dots per inch (DPI) at the final output size. Do no try to change form a low resolution to a higher one by increasing the DPI (resampling).
All files must be in CMYK mode. If your file was not created in or converted to CMYK, do so now.
The color mode of submitted files must be CMYK. If your files are submitted using any other color standard, such as RGB or Pantone, they will be converted to CMYK. Conversion from one color standard to another may cause colors to shift.
Gradients are commonly used in printing and in most instances produce good results. Gradients can be represented in a file as a mathematical equation (Vector) or rendered by the application into a series of pixels (Raster). Whether created as rasters or vectors, gradients below 5% may not reproduce accurately.
When you want an area of solid black within a document, 100% black (K) will not result in a solid, saturated black. Instead, use Rich Black, as represented by C:40% / M:20% / Y:35% / K:100%.
Before you save your final version, make sure you include cropmarks.