DAMPENING SYSTEMS -- Striking a Balance

According to the manufacturer, pressroom temperature is another variance factor and can impact the amount of water delivered by open dampening systems, which rely on surface tension for transfer. Similarly, contamination is of particular concern with brush dampening systems, the position paper continues. Ink-matted bristles will not transfer water properly, so the operators start cleaning the brushes with blanket wash, which winds up in the fountain solution and can lead to scum, toning and tint problems.