For UV Printing
Illustrator, CorelDraw Files
1. Convert text to outlines or attach font files.
Create outlines
Convert to curves
2. Embed images into files
Go to "Window > Link" to check if image is embed.
*Recommand image use resolution of 300dpi or above.

3. Separate white or spot UV to different layers.
Photoshop Files
1. Separate white or spot UV to different layers.
2. Set resolution to 300dpi or above.
PDF Files
1. Set resolution to 300dpi or above.
2. Choose standard PDF/x-4 or above.