Rollers are improperly or inadequately cleaned

Thoroughly clean-up with a good quality roller glaze remover.  (To remove glaze apply hot water to roll-ers after removing ink.  This will remove gum glaze that is not soluble in standard wash-up solvents)

Rollers are improperly set; rollers are swollen or distorted

Check and adjust roller settings.  Check roller surface conditions

Ink is unstable

Consult your Sun Chemical representative

Gum arabic and gum substitutes are in fountain solution; wetting agents used indiscriminately

Control use of additives and use proven fountain solution

Roller surfaces have calcium build-up on them

Consult your Sun Chemical representative