How Screen Prints are Made

I was looking for some information as to how Photoshop or Illustrator is used in the industry to design screen prints. I didn't find what I was looking for, but I did come across this very interesting video from India that shows how fabrics are printed by hand. Check out the long, long tables- the entire roll of fabric is laid flat and two printers swipe back and forth on a pattern board to print the color. You can imagine how intricate a 20 color hand print is by looking at the video.

Hand Printing in India (Youtube)