The color shift is the result of pigment burnout. The term burnout refers to the pigments in the ink fading or changing color. Certain pigments used in blue and green inks can exhibit a color shift when exposed to heat, (IR dryer, laminator) alkaline coatings (aqueous or UV), and UV light (UV dryer or sun exposure). The extent of the color shift depends on the conditions and pigments used in the ink. When ordering ink, the printer should inform the ink company that the ink is to be used with aqueous or UV coating, be exposed to heat, or be used outdoors in sunlight. When we evaluate problem jobs in our ink lab in which burnout may be the cause, we test one variable at a time to see if we can recreate it.