Pattern or shading is used

When pattern swatches are used in your designs, they can’t be interpreted properly by the printer resulting in the pattern not printing. To fix this, you’ll want to expand the pattern before saving it. Here is how to do that in Adobe Illustrator.****1. Select the shape(s) using a pattern fill. 2. Choose Object > Expand 3. With Fill checked, press Okay. 4. Save the file with our preflight settings that can be seen here.

How to expand pattern in Adobe Illustrator