阅读说明：本技术 一种白卡纸仿金/银卡纸的印刷工艺 (Printing process of white cardboard gold/silver-imitated cardboard ) 是由 王凌 束伟庆 于 2020-05-22 设计创作，主要内容包括：本发明属于印刷技术领域,涉及一种白卡纸仿金/银卡纸的印刷工艺,包括：将清漆印刷于白卡纸表面,所用凹印版深度为30U、100线,清漆印刷粘度22～25s,干燥温度105℃～120℃；将银墨印刷于清漆表面形成底银层,干燥温度70℃～90℃；在清漆层表面印刷透明黄,所用印版深度28U、100线,所述透明黄印刷粘度16s,干燥温度为105℃～120℃；冷却、收卷,得白卡纸仿金卡纸成品。相似的,还公开了白卡纸仿银卡纸的印刷工艺。本发明不仅实现白卡纸满版或局部具有金、银卡纸表面效果,银墨和后面两色的印刷溶剂均为酒精或水,解决了印刷成品VOC超标。生产工艺简单,产品质量高,绿色环保；灵活性强、效率高、成本低,减少了制作过程中的环境污染。(The invention belongs to the technical field of printing, and relates to a printing process of a white cardboard gold/silver-imitated cardboard, which comprises the following steps: printing varnish on the surface of the white cardboard, wherein the depth of a gravure plate is 30U and 100 lines, the printing viscosity of the varnish is 22-25 s, and the drying temperature is 105-120 ℃; printing silver ink on the surface of varnish to form a bottom silver layer, wherein the drying temperature is 70-90 ℃; printing transparent yellow on the surface of the varnish layer, wherein the depth of a used printing plate is 28U and 100 lines, the printing viscosity of the transparent yellow is 16s, and the drying temperature is 105-120 ℃; cooling and rolling to obtain the finished product of the white cardboard imitating the gold cardboard. Similarly, a printing process of the silver-imitated cardboard of the white cardboard is also disclosed. The invention not only realizes the surface effect of the white cardboard with gold and silver cardboard on the full or partial surface, but also solves the problem that the VOC of the printing finished product exceeds the standard because the silver ink and the printing solvent of the back two colors are both alcohol or water. The production process is simple, the product quality is high, and the environment is protected; the flexibility is strong, the efficiency is high, the cost is low, and the environmental pollution in the manufacturing process is reduced.)

1. A printing process of a white cardboard gold-imitated cardboard adopts an intaglio printing press, and is characterized by comprising the following steps:

(1) printing varnish on the surface of the white cardboard, wherein the depth of a gravure plate is 30U and 100 lines, the printing viscosity of the varnish is 22-25 s, and the drying temperature of a printing oven is 105-120 ℃;

(2) printing silver ink on the surface of varnish to form a bottom silver layer, wherein the depth of a gravure plate is 55U and 70 lines, the printing viscosity of the silver ink is 21-23 s, and the drying temperature of a printing oven is 70-90 ℃;

(3) printing transparent yellow on the surface of the varnish layer, wherein the depth of a used printing plate is 28U and 100 lines, the printing viscosity of the transparent yellow is 16s, and the drying temperature of a printing oven is 105-120 ℃;

(4) cooling and rolling to obtain the finished product of the white cardboard imitating the gold cardboard.

2. The printing process of the white cardboard gold-imitated cardboard according to claim 1, wherein the printing process comprises the following steps: the drying temperature of the printing oven in the step (1) is 110 ℃.

3. The printing process of the white cardboard gold-imitated cardboard according to claim 1, wherein the printing process comprises the following steps: the varnish in the step (1) is water-based varnish with good defoaming, adhesive force and flatness, and is mixed and dissolved with water when in use, and the mass ratio of the water to the varnish is 1: 1 to 1.5.

4. The printing process of the white cardboard gold-imitated cardboard according to claim 1, wherein the printing process comprises the following steps: the drying temperature of the printing oven in the step (2) is 80 ℃.

5. The printing process of the white cardboard gold-imitated cardboard according to claim 1, wherein the printing process comprises the following steps: in the step (2), the silver ink is high-brightness fine-particle non-floating ink which is mixed and dissolved with alcohol-soluble auxiliary agent when in use, preferably ethanol, and the mass ratio of the silver ink to the auxiliary agent is 1: 1 to 1.5.

6. The printing process of the white cardboard gold-imitated cardboard according to claim 1, wherein the printing process comprises the following steps: and (3) drying the printing oven at 80 ℃.

7. The printing process of the white cardboard gold-imitated cardboard according to claim 1, wherein the printing process comprises the following steps: the transparent yellow in the step (3) is water-based ink formed by color ink base materials with higher transparency, and is formed by mixing and dissolving the transparent yellow with water when in use, and the mass ratio of the water to the transparent yellow is 1: 1 to 1.5.

8. A printing process of a silver-imitated card paper of a white card paper adopts an intaglio printing machine, and is characterized by comprising the following steps:

A. printing a varnish on the surface of the white card paper, wherein the depth of a varnish gravure plate is 30U and 100 lines, the printing viscosity of the varnish is 22-25 s, and the drying temperature of a printing oven is 105-120 ℃, preferably 110 ℃;

B. printing silver ink on the surface of varnish to form a bottom silver layer, wherein the depth of a gravure plate is 55U and 70 lines, the printing viscosity of the silver ink is 21-23 s, and the drying temperature of a printing oven is 70-90 ℃, preferably 80 ℃;

C. cooling and rolling to obtain the finished product of the silver-imitated cardboard of the white cardboard.

9. The printing process of the ivory board silver-like cardboard according to claim 8, wherein: the varnish in the step A is water-based varnish with good defoaming, adhesive force and flatness, and is mixed and dissolved with water when in use, and the mass ratio of the water to the varnish is 1: 1 to 1.5.

10. The printing process of the ivory board silver-like cardboard according to claim 8, wherein: and B, the silver ink is high-brightness fine-particle non-floating ink which is mixed and dissolved with an alcohol-soluble auxiliary agent when in use, preferably the auxiliary agent is ethanol, and the mass ratio of the silver ink to the auxiliary agent is 1: 1 to 1.5.

Technical Field

The invention belongs to the technical field of printing, and relates to a printing process of a white cardboard gold/silver-imitated cardboard.

Background

When printing, the gold card paper and the silver card paper are used as base materials to print various colors, so that the low-tone elegant artistic aesthetic feeling can be displayed. Gold and silver card paper is mostly compounded by taking a film as a transfer medium, for example, CN110406176A discloses a production device of PET compound silver card paper and a process method thereof, wherein the production device comprises a coating machine, a vacuum aluminum plating machine, a wet compounding machine and a rewinding machine; the production process comprises the following steps: s1: gluing the PET film by a coating machine to uniformly adhere a coating layer on the PET film; s2: putting the glued PET film into a vacuum aluminizing machine, and carrying out vacuum aluminizing on the coating layer to obtain a PET matte silver transfer film; s3: simultaneously discharging the PET matte silver transfer film and the white cardboard on a wet compounding machine; coating water-based composite adhesive on the aluminum plating layer surface of the PET matte silver transfer film, and then compositely adhering the PET matte silver transfer film with white cardboard; s4: and (3) peeling off the PET film on a rewinding machine to obtain the PET composite silver card paper. However, the composite transfer process has unstable phenomena such as high price, excessive VOC and the like.

If gold or silver is directly printed on the surface of the white cardboard to manufacture the gold or silver cardboard, such as CN106758540A, the silver-printed cardboard for the cigarette and the manufacturing method thereof are disclosed, wherein the silver-printed cardboard comprises the white cardboard and an aluminum film, the white cardboard is printed with a layer of high-gloss paint as a ground color on a three-color flexographic printing machine in a flexographic way for the first time; the second time of flexographic printing of the bottom layer mirror surface silver paste coating, the third time of flexographic printing of the surface layer mirror surface silver paste coating, the white cardboard is all wood pulp fiber, the surface roughness of the white cardboard is less than or equal to 1.5 by a PPS (polyphenylene sulfide) method (um), and the gram weight of the paper in unit area is 150-300 g/m²(ii) a The amount of aluminum used is 0.1 to 0.12g/m²Silver in color; but also has the problems of poor adhesive force, poor subsequent printing color leveling, overproof VOC and the like.

The invention utilizes the printing coloristic principle to print the gold and silver ink layers on the white cardboard by a layered printing process so as to obtain the surface effect that the white cardboard has the gold or silver cardboard.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to disclose a printing process of a white cardboard gold/silver-imitated cardboard.

The specific technical scheme is as follows:

a printing process of a white cardboard gold-imitated cardboard adopts an intaglio printing press and comprises the following steps:

(1) printing varnish on the surface of the white cardboard, wherein the depth of a gravure plate is 30U and 100 lines, the printing viscosity of the varnish is 22-25 s, and the drying temperature of a printing oven is 105-120 ℃, preferably 110 ℃;

(2) printing silver ink on the surface of varnish to form a bottom silver layer, wherein the depth of a gravure plate is 55U and 70 lines, the printing viscosity of the silver ink is 21-23 s, and the drying temperature of a printing oven is 70-90 ℃, preferably 80 ℃;

(3) printing transparent yellow on the surface of the varnish layer, wherein the depth of a used printing plate is 28U and 100 lines, the printing viscosity of the transparent yellow is 16s, and the drying temperature of a printing oven is 105-120 ℃, preferably 80 ℃;

(4) cooling and rolling to obtain the finished product of the white cardboard imitating the gold cardboard.

In the better disclosure example of the invention, the varnish in the step (1) is water-based varnish with good defoaming, adhesive force and smoothness. When in use, the paint is mixed and dissolved with water, and the mass ratio of the water to the varnish is 1: 1 to 1.5. And the surface flaws of the white cardboard are eliminated by pre-coating varnish, so that the subsequent silver ink printing is smooth.

In the preferred embodiment of the invention, the silver ink in the step (2) is high-brightness fine-particle non-floating ink which is mixed and dissolved with alcohol-soluble auxiliary agent when in use, preferably ethanol; further, the mass ratio of the silver ink to the auxiliary agent is 1: 1 to 1.5.

In a preferred embodiment of the present invention, the transparent yellow in step (3) is a water-based ink formed from a color ink base material with high transparency, and the transparent yellow is formed by mixing the transparent yellow with water when in use, wherein the mass ratio of water to transparent yellow is 1: 1 to 1.5.

A printing process of a silver-imitated card paper of a white card paper adopts an intaglio printing machine and comprises the following steps:

A. printing a varnish on the surface of the white card paper, wherein the depth of a varnish gravure plate is 30U and 100 lines, the printing viscosity of the varnish is 22-25 s, and the drying temperature of a printing oven is 105-120 ℃, preferably 110 ℃;

B. printing silver ink on the surface of varnish to form a bottom silver layer, wherein the depth of a gravure plate is 55U and 70 lines, the printing viscosity of the silver ink is 21-23 s, and the drying temperature of a printing oven is 70-90 ℃, preferably 80 ℃;

C. cooling and rolling to obtain the finished product of the silver-imitated cardboard of the white cardboard.

In the better disclosure example of the invention, the varnish in the step A is water-based varnish with good defoaming, adhesive force and flatness, and is mixed and dissolved with water when in use, and the mass ratio of the water to the varnish is 1: 1 to 1.5. And the surface flaws of the white cardboard are eliminated by pre-coating varnish, so that the subsequent silver ink printing is smooth.

In the preferred embodiment of the invention, the silver ink in the step B is high-brightness fine-particle non-floating ink which is mixed and dissolved with an alcohol-soluble auxiliary agent when in use, and the preferred auxiliary agent is ethanol. Further, the mass ratio of the silver ink to the auxiliary agent is 1: 1 to 1.5.

The varnish and the silver ink can be mixed and dissolved when the varnish and the silver are printed in sequence, the silver card paper can be obtained through one-step printing, and the process is simple, quick and environment-friendly.

Firstly, according to target requirements, a gravure plate factory firstly makes two gravure plates according to a file (if the effect of gold card paper is achieved, a transparent yellow plate needs to be made), first color printing varnish (the depth of the printing plate is 30U and 100 lines), and later color printing silver (the depth of the printing plate is 55U and 70 lines), so that the subsequent printing color leveling can obtain the same effect as silver card paper; if a gold cardboard effect is to be obtained, transparent yellow is printed at the third color (plate depth 28U, 100 lines).

And secondly, the selection of the ink is very important because the problems of weak adhesive force and standard exceeding of VOC (volatile organic compounds) detection exist in the common silver ink printing. The invention selects the high-brightness fine particle non-floating silver ink, and simultaneously uses alcohol-soluble auxiliary agent and printing solvent as ethanol; selecting water-based varnish with good defoaming, adhesive force and smoothness as varnish; the third color transparent yellow needs to be prepared into water-based ink by selecting a color ink base material with higher fuel transparency, so that the printed color reaches the flatness and the high brightness of the gold card paper;

thirdly, controlling the printing viscosity of the silver ink within 21-23 s and the temperature of 80 ℃ during printing; the printing viscosity of the varnish is 22-25 s, the temperature is 110 ℃, the printing viscosity of the transparent yellow is controlled to be 16s, and the temperature is 110 ℃. The three printing ink printing solvents are ethanol and water, so that the problem that the VOC of the printed finished product exceeds the standard is well solved.

The printing process for printing the silver imitation gold and silver card paper on the white card paper is well realized.

The white cardboard manufactured by the process of the invention imitates gold (silver) cardboard: compared with the transfer of aluminum foil gold and silver card paper, the process is simple, only one-time printing is needed, the power consumption is reduced, and the waste gas emission is reduced; production cost of the company is reduced, and the benefit of the company is increased. Fourthly, the method can be used for copying gold and silver card paper with different hues, and has wide application range.

Advantageous effects

The invention can not only easily realize that the white cardboard has the surface effect of gold and silver cardboard on full or partial surfaces, but also can well solve the problem that VOC (volatile organic compounds) of the printed finished product exceeds the standard because the silver ink and the printing solvent for printing the two colors at the back are both alcohol and water. The production process is simple, the product quality is high, and the green environmental protection is realized; can be directly inserted into a normal product printing color group without extra special treatment, has strong flexibility, high efficiency and low cost, and reduces the environmental pollution in the manufacturing process.

Detailed Description

The present invention will be described in detail below with reference to examples to enable those skilled in the art to better understand the present invention, but the present invention is not limited to the following examples.