Generally, there are 200 grams, 250 grams, 280 grams, 300 grams, 350 grams and 350 grams of white cardboard, and different grams of white cardboard play different roles. The gram weight here represents per square meter/gram. Generally, the quantization is above 150g/_.

Second, the thickness is different:

The thickness of 230 grams of white cardboard is 0.3mm, and the thickness of paper with the same weight is different. Therefore, different batches of production or different manufacturers will have slightly different thicknesses. 1 mm = 10 mm. Common drum specifications: 787, 889; Dimensions: (positive) 787* 1092mm, (generous) 889* 1 194mm, other special flat plates or packaging sizes can be customized.

Third, the number of sheets per ton is different:

Length * width * gram weight of each paper (230)= weight of each paper, the unit is converted into Kg, and then one ton, that is, 1000Kg, is divided by the weight of each paper to get the number of sheets. Naturally, 250 grams, 350 grams and 230 grams of white cardboard have different quantities per ton of paper.

Extended data:

Related grades and uses of white paperboard;

After calendering or embossing, white cardboard is mainly used as a printing substrate for packaging and decoration, which is divided into three grades: A, B and C, and is mainly used for printing business cards, invitations, certificates, trademarks, packaging and decoration, etc. White cardboard requires high whiteness. A whiteness is not less than 92%, B whiteness is not less than 87%, and C whiteness is not less than 82%.

Single-layer or multi-layer composite paper fully sized with bleached chemical pulp is suitable for printing and product packaging, and can be used for business cards, menus or printing processing, gift box customization, top-grade picture book samples, packaging, book and notebook cover processing, etc.

Baidu encyclopedia-white cardboard