At DE Printed Box, we use the high quality grey board to make the cardboard gift boxes, paper rigid boxes, set up cases. Below is a introduction to the greyboard thickness, grammage, moisture content and unit ton price.
Relationship Between the Greyboard Thickness and Grammage
In China, we usually use the millimeters to measure the thickness of the greyboard, which is also referred to as chipboard. The greyboards that are commonly used to make the rigid box are in 1.5mm and 2mm. However, package manufacturers in North America and Europe use the grammage to measure the greyboard, like 1200gsm, 2000gsm. Then what is the relationship between the greyboard thickness and grammage? How can we easily converse one measurement to another?
There is a formula to calculate the thickness of the greyboard simply as below.
Thickness (mm) = Grammage (gsm) * 1.55 / 1000
For example, if the grammage is 1290gsm, then
Thickness (mm) = 1290 * 1.55 / 1000 = 2 mm
Below is a conversion table for the common greyboard thickness and grammage that are used for the cardboard gift boxes, rigid boxes and set up boxes.
615gsm 1mm
775gsm 1.2mm
970gsm 1.5mm
1160gsm 1.8mm
1290gsm 2mm
1420gsm 2.2mm
1581gsm 2.4mm
1645gsm 2.5mm
1805gsm 2.8gsm
1845gsm 3mm
2150gsm 3.5mm
2460gsm 4mm
Moisture Content of the Greyboard and Stiffness
The moisture content affects the greyboard stiffness. It varies from 8% to 13%. When the moisture content is low, the hard cover of the book and the rigid box will have the very good stiffness, resistant to the bending.
Greyboard Price
The price of the greyboard vareis a lot. For the ordinary greyboard, it unit ton price is around 550USD to 700USD. For the Grade A chipboard, the unit ton price would be as high as 850-1000USD. This will affect the rigid box price a lot finally.
China BBP Co., Ltd is a China medium-sized custom paper box manufacturer and packaging solution provider with facilities around 80,000 square meters in total. The company exclusively specializes in the supply and export of the custom paper boxes, including the paper printed box, corrugated printed box, cosmetic paper box, rigid paper box, cardboard gift box and custom paper bag. If you have any questions about the custom paper box, or would like us to give you a price quote, please do not hesitate to contact us by giving us an email.