On paper market, there have different kinds of paper for different showing efficiency.
Black cardboard paper, it is common used in paper bag area. It is one of specialty paper, double side of paper is black.
The features of black cardboard paper is delicate, and black, thick, strong folding, smooth surface, good stiffness, good tensile strength, bursting strength higher. That is why lots of clients like black cardboard as paper bag material.
The most popular gross weight on the market is 120gsm, used as paper bag or paper box paste paper. The features of black cardboard determind it only fit for foil slver stamping or foil gold stamping, dont fit for offset printing.
Kraft paper that is produced from chemical pulp produced in the kraft process. It is widely used as a plastic hazard free paper for cement, consumer goods. And nowadays, it is more and more populare with in shopping if print color or logo pattern on bag.
Kraft paper have white or brown two colors. White is most popular if used as shopping paper bag