Theory of Electro-static Charges

problem has been with the industry almost since the first power press. Since that time, nearly every conceivable theory developed for control of the problem has been tried with varying degrees of success. For many years, it has been the cause of variations in printing quality and volume of output over which little control has been exercised. Finally, it was accepted as a necessary evil in the industry. With increasing speeds of modern presses, and with the constant pressure for higher volume and better quality output, the problem of static control has grown beyond the “nuisance” level, and is now recognized as a costly problem that has to be solved if full profits and earnings are to be attained. Any improvements which reduce or eliminate static impairment in the printing industry are highly desirable. Operations personnel and printing engineers are giving major attention to this problem.