The Pantone Capture is a tool to control your variables in Screen Printing. It gives you the affirmation that you prepare or print consistency the right pantone color. More about Screen Print Variables and their tools you find here http://www.chilliisland.com/screen-printing/tools-to-master-the-variables/
It is very helpful in detection clients color too, if you receive only a sample or t-shirt or even the most famous business cart .)
The use of the Pantone Capture in Screen Printing is:
1) Prepare the right Pantone Color
2) Printing Water Based Ink your affirm in Production consistency
3) Prepare new Ink, confirms that the color is on the spot
4) Gives you the Pantone Color from a Client Sample
Let me know what you think, thanks.