The invention relates to a coated box board or coated kraft liner, in particular to a coated box board / kraft liner and a method for producing the same at low cost. The method comprises the steps of
coating prime coat on the box board or unbleached kraft liner and
coating top coat on the box board or unbleached kraft liner, wherein the primer coat comprises
starch; and the top coat comprises an optical brightening agent. The coated box board or coated kraft liner and the method have the following beneficial effects: the prime coat and the top coat do not have mandatory requirements for the rawmaterials and different quality of pigments can be used in the coat of different coatings, thus further saving the production cost, and the
coating weight each time is lower, thus not only being beneficial to
drying but also being beneficial to improvement of the production efficiency.