Nowadays, the application of paper has been extended to various fields

Nowadays, the application of paper has been extended to cultural science, daily life, medical and health, commerce, national defense, industrial and agricultural production and other fields. Office paper products are often overlooked in all office supplies, but because they are used more and more frequently, they are indispensable for our daily office. There are many kinds of office paper products on the market, such as: label paper, copy paper, punch paper, copy paper, printing paper, photo paper, fax paper..., the brand is also very diverse, the quality is different. How to find the most suitable paper for you from the dragon fish hybrid?
Copy paper comprehensive detection trick! In our daily office paper supplies, the most used office paper is copy paper and printing paper, and the most commonly used specifications are A3 and A4. There are many brands of copy paper and printing paper in the market, as well as many famous brand products, such as Epson, Donggang, Jiayin, Hongyisi, HP, Canon, Golden Flagship, Gaopin, Fule, Golden Ball, Classic Jiayin, Happy Bird, Baiwang, Kodak, Green Sky, Flagship, Xerox, Ssangyong, Tianzhang, Prince and Small Steel Cannon, users can choose the printing paper according to their printer or copier brand. If there is better compatibility, the printing and copying effect will be better.
Although the office every day with copy paper, printing paper contact, but many office staff for the understanding of the paper is still very shallow, the following more comprehensive introduction of the various properties of the paper and its impact in the daily office, in the purchase, you can refer to the following performance parameters, will be of great help. Especially for printing paper and copy paper, can refer to the following points to buy.
Tensile strength: Tensile strength refers to the tension of paper or cardboard. Usually expressed in absolute tensile strength: that is, the tensile strength of a certain width of the sample (Newton); Or in terms of breaking length: that is, the paper length (m) required for a certain width of paper to be broken under the action of its own gravity; Or the tensile strength of the transverse section; That is, the tensile strength of the unit cross section of the sample (Newton/m2). The higher the strength, the less likely the paper is to be broken. For example, after printing reports and forms on long paper, stick them on the wall. If the tensile strength of the paper is high, the reports or forms will not be easily broken and will remain as they are for a longer time.
Elongation: Elongation refers to the paper or cardboard after a certain tension. The percentage of elongation to the length of the original specimen at the time of fracture. Elongation is an important index to measure the strength and toughness of paper. Elongation is related to tensile strength. The higher the elongation, the stronger the flexibility of the paper, and the paper is not easy to be broken, which is similar to the rubber band. If the elongation is too low, in the use of a careless paper may break, whether for office work or economically speaking, have a negative impact.
Tear: Tear is the force required to tear a pre-cut specimen to a certain length, expressed in millicattle (ton). The breaking degree of paper is the ability of paper and cardboard to resist cracking. I don't know if you have found that some paper is easy to tear in half once it has cracks, which is the reason why the tearing degree is too low. Therefore, when purchasing, you may as well take a sample to tear and try to choose paper with high tearing degree.
Folding endurance: folding endurance refers to the number of reciprocating folding of paper and cardboard under a certain tension, which can withstand 180 °. The number of previous folds is indicated. The folding endurance indicates the ability of the paper to resist soft folding. It is largely related to elongation. Users can choose according to whether they will often fold the paper when using it, but it is recommended that you buy paper with high folding resistance.
Tightness: Tightness is the weight per cubic centimeter of paper and cardboard. The results are expressed in g/cm3. Tightness is a measure of the tightness of the paper or cardboard structure, is the basic nature of paper and cardboard. Tightness is actually the density of the paper. Generally speaking, the higher the tightness, the higher the tensile strength, because the more tightly the cellulose of the paper is combined, the elongation, tearing, and folding resistance will be higher. Therefore, it is a more important performance parameter, so we must pay more attention to it when purchasing.
Smoothness: Smoothness refers to the time required for a certain volume of air to pass through the gap between the surface of the sample under a certain pressure and the glass surface under a certain degree of vacuum, expressed in seconds. The higher the number of seconds, the better the smoothness of the paper. The better the smoothness of the paper, the more uniform and complete the contact between the paper surface and the print head or the sun drum when printing or copying, the more sufficient the transfer of ink, and the better the color effect of the printed product. On the other hand, the paper with poor smoothness has uneven and insufficient ink transfer, and the permeability of the paper to the ink amount is strong, so the color effect is poor, and it is often easy to make the ink color of the printed product flower and fade. Therefore, when buying, try to choose a good smoothness of paper, so the use of the effect will be better.
Gloss: Gloss refers to the degree of specular reflection on the surface of the paper, expressed as a percentage. The higher the gloss of the paper, the more the surface can reflect the light like a mirror, and the more it can show the bright appearance characteristics. In fact, in addition to specular reflection on the surface of the paper, there is also a diffuse reflection, which reduces the gloss of the paper. The paper with high gloss, the more vivid the ink color of the printed matter, and the visual effect of the ink color is also good. It can be said that the smoother the paper, the higher the gloss, and the higher the gloss of the printed color. There is a close relationship between the gloss and smoothness of the paper, but the gloss is not smoothness, and the glossy surface of the paper is not necessarily a smooth surface. From the gloss characteristics of the paper, it is of practical significance to choose the right paper according to the characteristics of the printed paper. Such as text-based books and periodicals text, should choose the general gloss of the paper, so as to avoid reflection, so that the eyes for a long time to see will not produce fatigue. The printing plate-based layout, should choose high gloss paper, so that the printing ink color uniform, thick, bright and pleasing to the eye.
Paper whiteness: paper whiteness refers to the ability of paper to reflect comprehensively after being irradiated by light, and it is also called paper brightness, expressed as a percentage. The higher the whiteness of the paper, the more accurate the characteristics of the ink color on its surface. This is because the white paper reflects the color light synthesized by the transparent ink layer. Therefore, high whiteness paper can reflect almost all the light, so that the printing ink is bright and pleasing to the eye, and the visual effect is good. The low whiteness of the paper, due to the absorption of only part of the color light, can not be true to show the contrast between the light and dark parts, but also easy to cause color cast. If some appear yellow, some appear red, some appear green, and some appear blue, etc. When the paper itself color cast, the color printed on the paper is the effect of the combination of ink and paper, which will inevitably lead to some color cast. Based on this situation, it is necessary to analyze the whiteness and color cast of the paper against the original when printing, and to correct the color cast by taking appropriate measures.
Absorbency of paper: The absorbency of paper refers to the absorption capacity of the paper to the binder and its solvent in the ink, usually expressed as a percentage. The absorption of paper is also called ink absorption, and its strength is very sensitive to the performance of color and the gloss of the ink layer. Strong ink absorption of paper, printing ink color compatibility easy light, ink layer also lack of gloss. In addition, because most of the binder in the ink is absorbed by the paper fiber tissue, the pigment particles are not sufficiently protected, and the ink film on the printed product is not strong, which is easy to make the blot "powder" phenomenon. On the contrary, if the ink absorption of the paper is too weak, the ink layer of the printed product will not adhere firmly, and the imprint will not be easy to dry, which will easily cause the back of the printed product to be dirty. Therefore, according to the characteristics of the use of printed matter, select the appropriate absorbent paper, in order to better ensure the quality.
After absorbing so much knowledge about paper, I believe that as a buyer, you will have better observation when choosing office paper.