CY/T 104.6-2014 "Printing technology, paper and paperboard printing suitability test method, Part 6: Through printing" specifies the principle of paper and Cardboard through printing testing, instrument materials, sample preparation, test steps and result representation. It is suitable for evaluating the degree of paper and Cardboard through printing after single-sided printing, and determines the through printing performance of paper by comparing the printing surface and non-printing surface. The standard is under the jurisdiction of the National Technical Committee for Printing Standardization and issued by the State Administration of Press, Publication, Radio, Film and Television to provide technical basis for printing quality control and paper selection.