What are the materials of paper bags?

<p>Nowadays, paper bags are no stranger to people's eyes. The market of paper bags will definitely be considerable in the future because it is so environmentally friendly. In the future, most people will choose to use paper bags, but do you know what materials are used in paper bags? The following editor will introduce the materials of the <a href="https://www.toppkg.com/paper-bag" rel="noopener noreferrer" target="_blank"><strong>paper bag</strong></a>?</p><p> The main materials of paper bags are: white cardboard, kraft paper, black cardboard, coated paper and special paper.</p><p>1. The advantages of white cardboard: solid, relatively durable, very good smoothness, the printed color is very rich and full, paper bags are usually 210-300 grams of white cardboard, often used is 230 grams of white cardboard .</p><p> 2. Material characteristics of coated paper: whiteness and glossiness are very good. When printing, it can make pictures and screens have a three-dimensional sense, but its solidity is not as good as white cardboard. The thickness of coated paper commonly used in paper bags is 128-300 grams.</p><p> 3. Advantages of kraft paper: It has high toughness and is not easy to tear. Kraft paper is generally suitable for printing some single-color or two-color paper bags with rich colors.</p><p>The commonly used size is: 120-300 grams 4. The advantages of black cardboard: solid and durable, the color is black, because the black cardboard itself is black, its biggest disadvantage is that it can not print color, but it can be used for hot stamping, hot silver And other processes.</p><p>Paper bag printing method</p><p>1. Offset printing, we also said that the current printing equipment mainly uses the rubber (rubber cloth) to transfer the design on the printing plate to the surface of the outer packaging paper bag, and this method of printing through the rubber cloth It is offset printing.</p><p>It has the characteristics of rich display in layers and fine details in details. It is the most important printing method in the printing industry.</p><p>When printing on the outer packaging paper bags, please pay attention to the following issues:</p><p>The resolution of the picture of the outer packaging paper bag affects the final printing effect. If it is too small, it is easy to appear blurred.</p><p>If the text on the outer packaging paper bag is too small, try not to use color, as this may easily lead to inaccurate color registration.</p><p>The design of the outer packaging paper bag should try to avoid the full-page solid color layout, which will affect the use effect.</p><p>Second, silk screen, printing plate (specially made perforations on paper film plates or other plates) When printing on outer packaging paper bags, the ink through holes are transferred to the outer packaging paper bags by a specific pressure, and the design effect is finally achieved Printing method.</p><p>Silk screen has the characteristics of unevenness and strong three-dimensional sense, and flat printing, embossing and gravure printing are called four printing methods.</p><p>When carrying out silk-screen printing on outer packaging paper bags, as long as you pay attention to the characteristics of silk-screen printing at the beginning of plate making, there is no problem.</p><p>3. Flexo printing is a direct printing method for outer packaging paper bags. It uses elastic and convex surface image printing plates, which is called flexographic printing.</p><p>Flexo printing has a strong visual impact.</p><p>The biggest taboo of flexo printing in outer packaging paper bags is that the designed text and lines are too thin, which increases the difficulty of printing;</p><p>The second is to try to avoid the use of reverse highlights to design small reverse text and lines when designing outer packaging paper bags;</p><p>In fact, as long as these two points are done, basically enough.</p>