In the studio album market , the main raw material are the white cardboard and black paper board ,compare with white cardboard , to use black cardboard as the raw material is more high-end. So ,even the price for the black board is higher than the white cardboard ,but some manufacturers was likely to use black paper to product album.

At the beginning of 2018-5-12, the grey board paper and black paper paper mill all over the country were similar, the price was up 400-500 yuan / ton,

New kind of high gram weight paper board - Duplex board with grey back,
  
The gram weight range is 800gsm to 2400gsm, the price is preferential.

The conventional weight of white wax paper is 24gsm, 28gsm, 31gsm and so on. ther are rolls

and sheets.

White reel wax paper can be used for printing, Our company has four color printing machines

and six color printing machines

All grey board and double grey board are called grey board for short，The difference is as follows：

1. The color of the paper core is different, the color of all grey cardboard paper surface and paper core is the same, the color of double grey cardboard paper surface and paper core is

Taking Guangdong as an example, we have enumerated the following rules between the price of grey board and the prices of raw materials in different grades of paper mills.

In June, the price of gray board was frozen. What is the reason? Nine dragons, Li Wen, Jin Zhou and Chien Hui enterprises voluntarily stop production.

The thickness of the paper is measured by micrometer, the thickness of paper is measured under certain area of pressure. The general pressure is 980 thousand PPA.