Moisture is the water content in paper and cardboard, that is, the ratio of the mass reduced by the sample after drying in accordance with the specified method to the mass at the time of sampling, generally expressed as a percentage. The water content of paper and board plays an important role in printing, post-press processing, product storage, and product use.

Quantitative, also called gram weight, is the most basic index of paper or cardboard, which refers to the quality of paper or cardboard per unit area, expressed in grams per square meter (g/m2). The quantitative level determines the strength of the paper or board. In general, the selection of high quantitative base paper is conducive to the improvement of the strength of corrugated cardboard and corrugated boxes