What do you mean by "AA KK TK" in the carton?
KK is the hard material of the cartonThe average carton hardness is K>A>B>CI specialize in carton making.
A=A "=" refers to five layers of corrugated cardboard (or double corrugated cardboard), facial tissue and interior paper with A paper, and two corrugated and medium paper are commonly used corrugated base paper.
