what is the white/black cardboard?

It is a kind of thick and thick paper with a large basic weight. White thick paper with a basis weight of about 200g/㎡ is weighed.
The main use of white cardboard is to print business cards, certificates, invitations, covers, monthly desk calendars, and postal postcards.
white cardboard has high requirements for whiteness. The whiteness of grade A is not less than 92%, the whiteness of grade B is not less than 87%, and the whiteness of grade C is not less than 82%.

Kinds and uses

it is also required to have high stiffness, bursting resistance and smoothness (except for embossed patterns), and the paper surface is flat, free from streaks, spots and other paper defects, and no warping Deformation phenomenon occurs.
The single-coated paper has a bright surface, even coating, fast ink absorption, good printability, and is suitable for delicate color printing. For the purpose of fine printing, the surface of the base paper is coated with paint, and the general coated paper is calendered by a super calender.
Double-coated paper is divided into single-sided and double-coated coated paper. According to the Japanese paper industry classification standard, the coating weight per side is about 10g/㎡ or more. It is the most commonly used paper in cultural publishing, advertising design, printing and binding, and industrial and commercial fields. one of the species.