In the past, people proposed to divide paper, cardboard and carton by their weight. In the early days, in the Shanghai market, paper with a weight of about 200g / square meter (with a smooth surface, polished, with high rigidity, also known as thin cardboard) was called heavy paper. In fact, it is also a kind of cardboard. The most common cardboard is not dyed, commonly known as white cardboard. If it is dyed, it is called color cardboard according to the color. White cardboard is named "white", so it has a high requirement for brightness. The brightness of grade A is not less than 92%, grade B is not less than 87%, and grade C is not less than 82%. The brightness exceeds 90%, it is a bit "shiny and dazzling". Colored cardboard is different in color, red is called red cardboard, green is called green cardboard, and black is called black cardboard.
Black cardstock mainly includes the following three categories:
1. Full wood pulp neutral and environmentally friendly, also known as full wood pulp black card paper, pure wood pulp black card paper, environmentally friendly black card paper, neutral black card paper;
Features include: neutral PH, environmental-friendly dyes, 100% recyclable treatment, no pollution, no color difference on both sides, the color of the middle part is also black, made from original wood pulp of the product, ultra-high rigidity, perfect smoothness and flatness, strong tensile strength, weights from 80g to 450g are all in stock, and those over 450g can be pasted.
2. Double-sided translucent black card paper. Short for double-translucent black card paper, translucent black card paper.
Features include: environmental-friendly dyes, recyclable, no pollution, no color difference on both sides, the color of the middle part is also black, made from waste paper pulped by Americans, high rigidity, strong tensile strength, weights from 180-450g are all in stock, and those over 450g can be pasted.
3. Single-sided black card paper. Abbreviation: Single-transparency black card paper, black base black card paper.
Features include: environmental-friendly dyes, recyclable, no pollution, two sides of color with color difference, made from American waste paper into wood pulp, high rigidity, strong tensile strength, weight from 180-600g all have stock, more than 600g can be pasted. This black card paper is characterized by no white spots on the surface, delicate paper, good rigidity, etc., suitable for photo albums, picture frames, gift boxes, jewelry boxes, stationery, leather goods products, speaker electronic gasket and various handicraft packaging, which is actually used for high-frequency file folders, quick labor file folders, shoe boxes, cosmetics boxes, boutique boxes, watch boxes, mobile phone boxes, MP3 boxes, tea boxes, handbags, garment, hardware packaging, clothing tags, wall calendars, calendars, desk calendars, photo albums, etc.
The above is the relevant introduction to black card paper, which is also one of the most common types of paper in our lives and plays an indispensable role in our lives. The main uses of black card paper are for photo albums, picture frames, backboards, gift boxes, jewelry boxes, mobile phone boxes, shoe boxes, stationery, clothing tags, notebooks, desk calendars, handbags, and electronic pads for loudspeakers, as well as packaging for various handicrafts. You may never have noticed it, but it has always been there, neither sad nor happy.