1. Different gram weights:

White cardboard generally has 200g, 250g, 280g, 300g, 350g, 350g white cardboard, with different grams. White cardboard also plays different roles. The weight here represents grams per square meter. The general ration is above 150g/㎡.

2. Different thicknesses:

The thickness of 230g white cardboard is 0.3mm. Paper with the same weight has different thicknesses due to different tightness. Therefore, there will be slight differences in thickness between different batches or manufacturers. 1 mm = 10 silk meters. Common reel specifications: 787, 889; size: (positive) 787*1092mm, (generous) 889*1194mm, other special flat or roll sizes can generally be customized.

3. The number of sheets per ton is different:

The length * width * gram weight of each sheet of paper (230) = the weight of each sheet of paper, the unit is converted to Kg, and then one ton is Divide 1000Kg by the weight of each paper to get the number of sheets. Naturally, the number of sheets obtained per ton of 250g, 350g, and 230g white cardboard is different.

Extended information:

Relevant grades and uses of white cardboard:

White cardboard is calendered or embossed and is mainly used for packaging and decoration. The printing substrates are divided into three levels: A, B and C. Mainly used for printing business cards, invitations, certificates, trademarks, packaging and decoration, etc. White cardboard has very high requirements for whiteness. The whiteness of grade A is not less than 92%, grade B is not less than 87%, and grade C is not less than 82%.

Single-layer or multi-layer paper made entirely from bleached chemical pulp and fully sized. It is suitable for printing and product packaging. It can be used for business cards, menus or printing processing, and customized gift boxes. High-end picture album sample album, suitable for packaging, book, notebook cover processing and production, etc.

Baidu Encyclopedia-White Cardboard