Corrugated paper board face is always appear a large number of black spot, how to return a responsibility?

Corrugated paper board face is always appear a large number of black spot, how to return a responsibility? Corrugated paper board face is always appear a large number of black spot, how to return a responsibility?

in general, for corrugated board quality requirements are: cardboard to level off, the dimension precision, surface not spotted. If the surface of the corrugated board spotted will affect the printing color, spots printing color will form the off color. And some of the electronics customers requirements for the surface of the paper is very rigorous, is generally not allowed to have spots. So why the surface of the paper will be spot?
the phenomenon of reading: base paper surface spots, usually due to the problem of base paper, because the base paper in the process of production, the residue inside the clinker composition material, through the tissue heating process have chemistry homework, tiny plastic particles melt after black spot sizes, this kind of situation appears more recycled paper is paper base paper liner.
the solution: the tissue before use sampling to preheating cylinder, heating under two minutes after viewing pattern, no spots appear can be used at this time, if any will change the base paper. In the selection of base paper, do not covet is cheap, choose the brand base paper with good reputation. Conversion table packaging printing knowledge