Make colors overprint for professional printing.
Overprinting Objects
Overprint in Photoshop
About Overprinting: Colors Knocked Out (By Default) and With Overprinting, PDF, Vision
Letterpress Prints Overprinting the Love Me Tender Print
Overprinting - song and lyrics by Dried Flower
What is Overprinting?
How to Overprint Colors to Create Cool Print Effects
Overprinting with tomographic VAM and EC gel photoresist. (a) CAD model
What is Overprinting and How it Can Ruin Your Print Marketing
Overprinting versus Knockout
overprint - Smallest color set for overprinting? - Graphic Design Stack Exchange