Evaluation testing

The inner core paper of the notebook can strictly control the internal folding degree of the paper through the detection of long and short fibers, so that our paper can be produced in large quantities without any horizontal breakage, cracking or other phenomena.

This is our notebook core paper, a smoothness testing instrument that can strictly control the smoothness of the paper, making our paper writing smooth, smoother, and providing a better consumer experience.

This is our notebook core paper and paper thickness detection instrument, which can strictly control the thickness of the paper. As we often say, the weight of the paper per square meter is 60 grams, 70 grams, 80 grams, and the positive and negative weight difference is strictly controlled, not exceeding 2 grams.