In order to attract more consumers' attention, more and more corrugated box manufacturers choose offset printing or preprint (flexographic printing, gravure printing) to make corrugated boxes. However, due to the purchase of "sick" paper, the printing equipment was shut down, the corrugated box scrap rate increased and the customer complaint rate increased, which made the corrugated box production enterprises pay a painful price. Then, what are the paper diseases of the face paper making corrugated boxes (mainly gray background whiteboard, coated kraft cardboard, etc.). 7 What are the causes of these paper diseases? 7. What will be the impact on the printing process if you buy these diseased "paper". 7 in this paper, the author analyzes the common causes of corrugated base paper one by one, hoping to help corrugated box manufacturers identify the advantages and disadvantages when purchasing base paper.