Xuan paper imitation water writing paper and its making method

Abstract

A water writing paper simulating the Xuan paper is composed of black base paper and coated white layer, and is prepared through making black base paper, preparing white paint and coating. Said black base paper contains pulp fibres, black pigment, adhesive, acid salt, dry strnegthening agent, and wet strengthening agent. Said white paint paint contains white pigment, disperser, adhesive (butadiene-styrene or propadiene styrene emulsion and PVA), cross-linking agent and regulator. Its advantages are low cost, clear tracing and cyclic use.

Description

technical field [0001] The invention relates to a method for making paper, in particular to a method for making imitation Xuanshui writing paper. Background technique [0002] In the 1980s, some water writing papers appeared, one was to apply black dye or pigment to one side of raw rice paper, and use it on the other side after drying; the other was to apply a layer of colored paper (black or blue, etc.) ) is pasted on the back of a layer of white paper, and then write on the white layer with clear water; there is also a kind of white double-adhesive paper coated with a layer of black paint first, and then coated with a layer of white paint after drying. The above three kinds of paper all have the disadvantages of high production cost, complicated technological process, poor practicability and operability. For example, the first type of water writing paper is applied on raw rice paper. Raw rice paper is thinner and its strength, water resistance, and wet strength are poor. ...

AI Technical Summary

Problems solved by technology

The above three papers all have the disadvantages of high production cost, complicated process, poor practicability and operability

For example, the first type of water writing paper is applied on raw rice paper. Raw rice paper is thinner and its strength, water resistance, and wet strength are poor. On one side, it becomes two sides and one color, which can not achieve the expected effect. In addition, due to the poor flatness, not only can it not be printed, but also it is difficult for the learner to grasp the uneven paper when using it; Difficulty, large damage to the paper surface, and poor flatness; the above two kinds of water writing paper cannot meet the conditions of repeated writing for a long time, and it is difficult to form industrialized production in actual operation, so the practicability is poor

The third type of paper has been produced in batches, but the cost is high, the process requirements are high, the process is complicated, and it lacks market competitiveness.

There is also a kind of water writing paper somewhat similar to the present invention, which is directly produced into paper with better fiber primary pulp and dyes. The color is generally blue or blue black, but the disadvantage is that the cost is high and cannot be high-grade; the appearance of this product is dull. , the water is not clear and clear after writing, especially when used in poor light conditions, it is not suitable for clear recognition, so it is very damaging to eyesight, and it is very suitable for visual fatigue after long-term use, which is not conducive to the physical and mental health of learners

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