Screenprinters are earnestly pursuing the perfect white ink and end up with dozens of unused gallons of ink on their shelves in the search. The truth of the matter is that the problem is not the ink, but rather the way in which it is being used.
Are you weighing your ink as it arrives at your shop? If not, you should be. The cost of ink, second only to labor cost, is an expendable that must be accounted for and should be done on a job-by-job basis.
If you want to increase the quality of your halftone or four-color process printing the information in this episode will provide some of the knowledge you need to begin.
It's about initiating -- continually creating situations that force you to become better than you currently are — purging yourself of all your imperfections.