White cardboard is a thick paper that is thick and thick.
In the past, some people planned to use quantitative basis as the basis: paper, cardboard and cardboard; in the early years in Shanghai shopping malls, the amount of white thick paper with a basis weight of about 200g/m2 (smooth surface, calendered, high stiffness, also known as thin cardboard ), call the weighing paper. In fact, it is also a kind of paper jam. The most common jam is not colored, and it is called white cardboard. If it is colored, it is called color cardboard.
The main purpose of white cardboard is to print business cards, certificates, invitations, covers, calendars and postal postcards.
The white card is surnamed "white", so the whiteness is very high. The whiteness of A is not less than 92%, B is not less than 87%, and C is not less than 82%. Whiteness is more than 90%, it is a bit "bright".
White cardboard also requires high stiffness, bursting resistance and smoothness (except for white cardboard with embossed pattern), paper surface is flat, no streaks, spots and other paper diseases are allowed, and warpage is not allowed. The phenomenon of deformation occurs.
The single copper paper has a bright surface, uniform coating, fast ink absorption and good printability, and is suitable for delicate color printing. For the purpose of exquisite printing, the surface of the base paper is coated with a coating, and the general coated paper is calendered by a super calender.
Double copper paper is divided into single-sided and double-coated coated paper. According to the Japanese paper classification standard, the coating amount per side is about 10g/m2, which is the most commonly used paper for cultural publishing, advertising design, printing and binding, and the industrial and commercial industry. One of the species.
Double-adhesive paper refers to printing paper, also known as offset paper. Like our book, it is printed on double-adhesive paper (but the paper surface of fashion magazines like Ruili is slippery and coated with double gloss. Paper), generally between 60 grams and 120 grams, there are also 150 grams of high-gram weight double-adhesive paper. Below 60 grams is not called double-glue and called writing paper, writing is a relatively poor paper.