1 - Preface - Intro to Spot color Printing
     1a - What are PMS Colors?
PMS or Pantone Matching System is a specific brand of inks used for color matching. The process of using PMS colors in generally know as Spot Color printing and are a way of printing without the use of 4 Color Process Inks (CMYK - Cyan, Magenta, Yellow, Black).
     1b - Why use PMS Colors?
The Pantone Matching System is the most well know ink matching system in the world. Most spot color jobs will be using this as reference and it has been an industry standard for a long time. Also, they have a larger gamma range than CMYK so colors can be more vibrant. But even more importantly, PMS colors are consistently reliable because they do not require the combination of 4 colors such as CMYK.
     1c - How to Color Separate art from Adobe Illustrator and Photoshop?
We suggest following the below steps in the order presented. But some of the steps may not pertain to your art. For instance, if you don't have gradients in your art then you can skip that step. Clicking on the links will take you to their prospective pages.
2. How to create Color Separations in Adobe Illustrator?
3. How to create Color Separations in Adobe Photoshop?
4. How to use Adobe Photoshop separations in Adobe Illustrator?
5. General Reference.