What does carton material "K737K" mean?
This is a five ply carton, K-7-3-7-K, which represents its base paper and facial tissue. It's K paper and core paper is 7 paper
Cartons of cardboard for 5 layers of cardboard, facial tissue paper for K paper, now generally 200g, 7 core paper for strengthening the core, weight, each manufacturer is not the same
This paper is just the code, corrugated cardboard manufacturers in order to facilitate the management of paper and set the code, different letters represent a different paper. Not paper level, different manufacturers, different weight, the code is different, 5 letters and numbers that are composed of five cardboard material code, that three one is three layers. The first paper is K code, from left to right for the paper, corrugated core paper, B, C or A Leng Leng, in the paper.
