Properties of Paper and its Quality

Choosing paper for the office, at first glance, it seems not too difficult, but a wrong decision can lead to waste, and to the deterioration of the image of the firm.

With the introduction of a new generation of high-speed digital copiers and printers has increased significantly the rate of paper in the machine, more and more customers require double-sided documents. Therefore, the quality requirements for paper and other materials used for printed works in the office are constantly increasing. The question what is the most good paper, in most cases, you can hear that it is "very white paper." Not by chance on the market in recent years appeared a lot of copy paper perfect white for suspiciously low price. In fact, White has the same relation to the quality of paper as the color of the car to its performance.

Quality of paper is determined by its physical, chemical, electrostatic properties, as well as finish.

Physical properties:

Density (in g/m2) - copiers and printers work best with paper that is 80-90 g/m2, although most modern devices can operate with paper of different densities;

Thickness (in mm) - depends on the density and compaction of paper. The higher the thickness, the more restrictive is the paper;

Hardness - the resistance bending force. Paper may be too loose or, conversely, too rigid. This paper is poorly served and causes a jam;

Opacity (in %) - double-sided printing, it is important that the paper was not transparent. Usually, the smaller the density of paper, so it is transparent;

Roughness and smoothness - affects the quality of image transfer. On rough paper, toner can be fixed properly, it is erased or flaking;

Direction of fibers - to the copier or printer to work better, fibers must be oriented along the long edges of the paper;

Humidity (%) - the optimal value of paper moisture is equal to 4.5%, which provides the necessary electrical resistance and reduces twisting;

Curl - bond paper should not have a residual deflection after the printing process. On paper curl effect high moisture content, exposure to high temperatures and pressures;

Brightness - affects the contrast between the image and the paper that makes the picture more readable.


Chemical and electrical factors:

Clean the surface of the sheet - external pollution associated with dust, formed as a result of poor-quality paper sizing, and the interior caused by the chemicals - the consequences of poor process;

Tar - limited to a paper in order to keep unchanged the shape of the leaf, so the resin tends to evaporate under the heat.


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