Ink takes on too little or too much press mix during emulsification.

CAUSE CURE
Poor ink/water balance Re-balance ink/water. See Ink/Water balance
Poor compatibility between ink and fountain solution (Ink is too soft or tacky to allow a controlled emulsification process. Fountain solution is too aggressive to the ink breaking it down too quickly.) Consult with both your ink and fountain solution manufacturer for better matched ink and fountain solution.