Preparation method of offset paper

Abstract

The invention provides a preparation method of offset paper. The method comprises the following steps of: preparing 1.0 mass percent of oxidized starch solution and 0.8 mass percent of anionic dispersed rosin emulsion, evenly mixing the oxidized starch solution and the anionic dispersed rosin emulsion in equal quantity, so as to prepare sizing agent solution; adding ethyl cellulose into the sizing agent solution, stirring and evenly mixing, preparing surface sizing solution of the ethyl cellulose, the oxidized starch and the anionic dispersed rosin emulsion; and performing sizing, drying and press finishing on the raw offset paper on a surface sizing machine by using the surface sizing solution. The ethyl cellulose solution, the oxidized starch solution and the anionic dispersed rosin emulsion are mixedly coated on the surface of the raw offset paper; the composite film formed by ethyl cellulose, oxidized starch and neutral rosin has lipophilicity; the affinity of the paper and ink can be obviously improved; binders of the ink can rapidly permeate into fiber clearances of the paper; the drying speed of the ink on the surface of the paper can be accelerated; and the offset paper is low in cost, and has a good popularization and application value.

Description

technical field [0001] The invention relates to a method for preparing paper, in particular to a method for preparing offset paper. Background technique [0002] After the traditional offset paper is printed with ink, the back of the printed matter will be smudged to varying degrees, that is, the ink on the lower printed matter will smudge the back of the upper printed matter because it is not dry. The main reason is that The drying speed of the ink on the paper is slow, and the printing speed of the printing press is fast. Therefore, the ink is not dry on the paper, and the back of the next print is piled on the ink that has not yet dried, resulting in Smearing on the back of printed matter; in order to solve the problem of smearing on the back of printed matter, the general method is: reduce the printing speed and prolong the drying time of printed matter; or sprinkle a layer of powder on the surface of printed matter, and use powder particles to isolate the ink layer from...

AI Technical Summary

Problems solved by technology

[0002] After the traditional offset paper is printed with ink, the back of the printed matter will be smudged to varying degrees, that is, the ink on the lower printed matter will smudge the back of the upper printed matter because it is not dry. The main reason is that The drying speed of the ink on the paper is slow, and the printing speed of the printing press is fast. Therefore, the ink is not dry on the paper, and the back of the next print is piled on the ink that has not yet dried, resulting in Smearing on the back of printed matter; in order to solve the problem of smearing on the back of printed matter, the general method is: reduce the printing speed and prolong the drying time of printed matter; or sprinkle a layer of powder on the surface of printed matter, and use powder particles to isolate the ink layer from the previous The back side of the layer of paper is contacted, and then the printed matter is put into the warehouse to dry, which is obviously inefficient and takes up a large production space