Nowadays,the use of gray cardboard is very extensive,and a large part of it is used in the packaging market.The double gray board is very good in packaging,but the requirements of the product must meet the standard to play its due role.When making a double gray board,we must first consider its use and enhance the performance of the product in some aspects.
1.Gray cardboard should have a certain layering strength to meet the needs of the process of the finishing process.
2,gray cardboard should be used according to paper loose and good plasticity,to ensure the characteristics of bronzing,frame pressing.
3,gray cardboard should have good stiffness and strong mechanical,used to maintain the practicality and durability of books and albums.
4.The gray cardboard should have the characteristics of uniform thickness and non-deformation of the cardboard,which is used to maintain the standardization of the design of the cover.
5,gray cardboard itself does not allow the use of a variety of plant starch and adhesives,etc.,so as not to breed mold.