A digital proofing printing method for photolithography positioning paper

Abstract

The present application belongs to the field of printing technology, and discloses a photoetching positioning paper digital proofing printing method, which comprises the following steps: step 1: using double-sided coated PET base, adopting UV mold pressing mode to copy the PET base with a photoetching information layer; step 2: digitally printing graphic information on the other side of the PET base with the photoetching information layer; step 3: using a laminating machine to compound the pre-coated high-brightness aluminum film with the photoetching information layer of the PET base; step 4: after copying the information layer and the printing layer by using the double-sided coated PET base, using glue to compound the product with paper; step 5: after mounting the paper, using semi-automatic equipment to complete the subsequent gold plating, silk printing or concave-convex process according to the needs of the proofing process; and step 6: using a knife plate to die-cut the printed matter into a product box. The present application greatly shortens the photoetching positioning paper digital proofing process, reduces the production cost and improves the sample output efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of printing, and in particular relates to a digital proofing printing method for photolithography positioning paper. Background Art

[0002] Photolithography positioning paper is being used more and more widely in the development of new cigarette label products. Before new products are mass-produced, digital proofing is required, and mass production can only be carried out after confirmation with the customer. Therefore, in the proofing process, the timeliness and cost of sample realization are particularly important. Traditional photolithography positioning paper printing requires a very complex process flow. The process from photolithography plate making to paper digital printing is complicated and time-consuming. There is currently no small equipment suitable for the pilot stage. If all mass production printing equipment is used for proofing tests, not only will the material input be large, the equipment operation energy consumption is high, and a large cost, time and manpower are consumed, but the output rate will also be extremely low. In order to solve the problems of new product development with a small number of samples, high timeliness requirements and low costs, it is necessary to change the process and procedures to achieve the goal of high efficiency and low cost in the new product development process. Summary of the Invention

[0003] The present invention aims to provide a digital proofing and printing method for photolithography positioning paper to solve the above-mentioned technical problems.

[0004] In order to solve the above technical problems, the specific technical solution of the digital proofing printing method of lithography positioning paper of the present invention is as follows:

[0005] A digital proofing and printing method for photolithography positioning paper comprises the following steps:

[0006] Step 1: Using a double-sided coated PET substrate, replicate the PET substrate with a photolithographic information layer using UV molding;

[0007] Step 2: Digitally print graphic information on the other side of the PET substrate with the photolithography information layer;

[0008] Step 3: Use a laminating machine to laminate the pre-coated high-gloss aluminum film with the photolithographic information layer of the PET substrate;

[0009] Step 4. After replicating the information layer and printing layer using a double-sided coated PET substrate, the finished product is laminated with paper using glue.

[0010] Step 5: After mounting the paper, use semi-automatic equipment to complete the hot stamping, silk screen printing or embossing process according to the needs of the proofing process;

[0011] Step 6: Use a die cutter to die-cut the printed material into the finished box.

[0012] Furthermore, the step 1 includes the following specific steps:

[0013] The PET film base is first corona-treated and then coated on both sides with water-based polyurethane varnish. Then one side of the PET film base is coated with UV polyester acrylate resin and bonded to the information side of the photolithography master. After UV light exposure, the photolithography master is separated from the PET film base, and the information is copied onto the PET film base.

[0014] Furthermore, the thickness of the PET base is less than 50u.

[0015] Furthermore, the step 2 includes the following specific steps:

[0016] After the PET substrate with the photolithography information layer is placed into the paper feeding unit of the digital quick printing machine, the other side of the information layer is digitally printed with graphic information and registered with the photolithography information pattern.

[0017] Furthermore, the laminating machine in step 3 is a small pre-coating laminating machine, and the pre-coated high-gloss aluminum film is a pre-coated high-gloss aluminum BOPP film.

[0018] Furthermore, the production process of the pre-coated high-gloss aluminum BOPP film is as follows: firstly, a glue layer is coated on one side of the BOPP film, and then the other side is subjected to BOPP vacuum aluminum plating to produce the pre-coated high-gloss aluminum BOPP film.

[0019] Furthermore, the aluminum plating thickness of the pre-coated high-brightness aluminum BOPP film is at least 400A.

[0020] Furthermore, a glue layer is coated on one side of the BOPP film, and a BOPP vacuum silver plating is performed on the other side to produce a pre-coated high-gloss silver BOPP film.

[0021] Furthermore, the step 4 includes the following specific steps:

[0022] Use LIWANDA062 desktop glue machine to mount the high-gloss aluminum film layer of the PET base with white card paper using water-based white latex glue.

[0023] Furthermore, the white cardboard is 225g, 170g or 130g.

[0024] The digital proofing and printing method of photolithography positioning paper of the present invention has the following advantages:

[0025] The whole process of the present invention does not require silver mirror reaction and CVD original plate processing, and no heavy metals and chemical reagents are discharged during the process, which reduces the process flow, improves production efficiency and reduces emissions, making it green, environmentally friendly and low-carbon.

[0026] The present invention uses a double-sided coated PET thin substrate as a printing carrier and a photolithographic information layer carrier to complete the replication of the information layer and the printing layer, eliminating the process of coating and molding each time for a single product, and does not require the use of large-scale molding process equipment;

[0027] The paper aluminizing of the present invention is completed by a pre-coating film composite process, and finally glue is used to composite the paper to obtain the finished product, eliminating the need for vacuum aluminizing of individual products each time, saving the loss caused by batch vacuum aluminizing, eliminating the use of large-scale composite machines, and shortening processing time and costs;

[0028] The present invention uses a PET substrate to directly UV replicate the photolithography information layer and then directly digitally print on the other side of the PET substrate, which greatly shortens the papermaking process, greatly reduces the paper regularity error, improves the mold error positioning accuracy, realizes rapid sampling of what you see is what you get, shortens the paper processing time and reduces material loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 Digital printing flow chart for traditional photolithography positioning paper;

[0030] Figure 2 This is a flow chart of the digital proofing and printing method for lithographic positioning paper of the present invention;

[0031] Figure 3 This is a schematic diagram of the interlayer structure of the photolithography positioning paper of the present invention;

[0032] Figure 4 It is a schematic diagram of the photolithographic positioning paper material of the present invention. DETAILED DESCRIPTION

[0033] In order to better understand the purpose, structure and function of the present invention, the following is a further detailed description of a digital proofing and printing method for lithography positioning paper of the present invention in conjunction with the accompanying drawings.

[0034] like Figure 1 As shown, the traditional digital printing process of photolithography positioning paper is as follows: first, a flat photolithography master is made into a silver plate through a silver mirror reaction, and the silver plate is made into a nickel plate through a chemical reaction. The nickel plate is then copied onto a roller through molding to make a molded original. The PET film is then coated with varnish, and the prepared molded original is molded on the PET film to transfer the photolithography information on the molded original to the PET film. The PET film printed with the photolithography information layer is then vacuum-plated with aluminum. The roll base paper is then laminated with the aluminum layer, and finally cut into sheets for graphic printing, and then die-cut into shape.

[0035] Traditional digital printing with photolithography and positioning paper is primarily used for mass production, requiring the production of metal masters for batch replication. This process is cumbersome and requires a large amount of material. Furthermore, each individual product requires vacuum aluminum coating using a large-scale Bobst K4000 aluminum coating machine. BOPP material is first coated with glue on one side, then vacuum aluminumized with a BOPP film on the other side. This is then laminated with a PET base sheet based on the required amount. The embossing process requires large-scale equipment such as a three-piece embossing machine, and the paper laminating process requires large-scale equipment such as the Sonde SFH1300 laminating machine. The entire process is time-consuming, energy-intensive, and costly.

[0036] The present invention adopts a semi-automatic manual proofing method, which saves the use of processes and large equipment, such as Figure 2 As shown, the specific steps include:

[0037] Step 1: Using a double-sided coated PET substrate, replicate the PET substrate with a photolithographic information layer using UV molding;

[0038] The PET film base is first corona-treated and then coated on both sides with water-based polyurethane varnish to improve the adhesion of printing ink and molding resin. Then one side of the PET film base is coated with UV polyester acrylate resin and bonded to the information side of the photolithography master. After UV light exposure, the photolithography master is separated from the PET film base, and the information is copied onto the PET film base.

[0039] The present invention uses PET material as the film base, which has the characteristics of high transparency, stable physical properties, and no deformation during the photolithography information and printing replication process; in order to enable indentation at the folding part of the subsequent packaging paper box, the thickness of the PET film cannot be too thick, otherwise indentation and die-cutting cannot be achieved. Therefore, the thickness of the PET film needs to be controlled below 50u to ensure that the die-cutting indentation stiffness after compounding with paper meets the die-cutting requirements.

[0040] Step 2: Digitally print graphic information on the other side of the PET substrate with the photolithography information layer;

[0041] After the PET substrate with the photolithography information layer is placed into the paper feed unit of the HP Indigo7900 digital quick printing machine, the other side of the information layer is digitally printed with graphic information through the HP Indigo7900 and registered with the photolithography information pattern.

[0042] Step 3: Use a laminating machine to laminate the pre-coated high-gloss aluminum film with the photolithographic information layer of the PET substrate;

[0043] The laminating machine used is an AIPU FM360J small pre-coating laminator. The pre-coated high-gloss aluminum film is a pre-coated high-gloss aluminum BOPP film. The production process involves applying a layer of glue to one side of the BOPP film, followed by vacuum aluminum plating on the other side. The aluminum plating thickness reaches at least 400Å. The surface can also be plated with highly reflective materials such as silver, depending on the product's desired effect, to enhance the effect of light diffraction on the information layer. The pre-coated high-gloss aluminum film is then cut to the appropriate size based on the required amount and laminated with the PET substrate. For subsequent proofing, simply cut the pre-coated high-gloss aluminum film to the appropriate size, eliminating the need for vacuum aluminum plating each time, thus reducing the waste associated with batch vacuum aluminum plating.

[0044] Step 4. After replicating the information layer and printing layer using a double-sided coated PET substrate, the finished product is laminated with paper using glue.

[0045] The high-gloss aluminum film layer on the PET base is laminated with 225g, 170g, or 130g white cardstock using a LIWANDA062 desktop glue machine. The lamination process is performed using a Sonde laminating machine SFH1300.

[0046] Step 5: After mounting the paper, use semi-automatic equipment to complete the hot stamping, silk screen printing, embossing and other processes according to the needs of the proofing process.

[0047] Step 6: Use a die cutter to die-cut the printed material into the finished box.

[0048] like Figure 3 The interlayer structure of the photolithography positioning paper of the present invention is shown as follows: one side of the PET base comprises a PET base coating layer and a printed image layer, and the other side comprises a PET base coating layer, a photolithography information layer, a pre-coating film adhesive layer, a pre-coating film aluminum plating layer, glue, and a paper base layer. Figure 4 The figure shows the structure of the photolithography positioning paper material of the present invention, wherein the bottom layer is a paper base layer, on the paper base layer is a pre-coated aluminum layer, and on the pre-coated aluminum layer is a PET sheet base layer.

[0049] The whole process of the present invention does not require silver mirror reaction and CVD original plate processing, and no heavy metal and chemical reagent emissions are generated during the process, which reduces the process flow, improves production efficiency and reduces emissions, and is green, environmentally friendly and low-carbon. The present invention adopts a double-sided coated PET thin substrate as a printing carrier and a photolithography information layer carrier to complete the replication of the information layer and the printing layer, eliminating the process of coating and molding a single product each time, and does not require the use of large-scale molding process equipment. The paper aluminum plating of the present invention is completed by a pre-coating film composite process, and finally glue is used to composite the paper with glue to obtain a finished product, eliminating the process of vacuum aluminum plating a single product each time, saving the loss caused by batch vacuum aluminum plating, eliminating the use of large-scale compounding machines, and shortening processing time and cost. The present invention uses a PET substrate to directly UV replicate the photolithography information layer and then directly digitally print on the other side of the PET substrate, which greatly shortens the papermaking process flow, greatly reduces the paper rule error, improves the molding error positioning accuracy, realizes what you see is what you get fast sampling, shortens paper processing time and reduces material loss.

[0050] It will be understood that the present invention is described by way of some embodiments, and it will be appreciated by those skilled in the art that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are intended to be protected by the present invention.

Claims

1. A digital proofing and printing method for photolithography positioning paper, characterized in that: The steps include: Step 1: Using a double-sided coated PET substrate, replicate the PET substrate with a photolithographic information layer using UV molding; The PET film is first corona-treated and then coated on both sides with water-based polyurethane varnish. Then, one side of the PET film is coated with UV polyester acrylate resin and bonded to the information side of the photolithography master. After UV light exposure, the photolithography master is separated from the PET film, and the information is copied onto the PET film. The thickness of the PET film is less than 50u. Step 2: Digitally print graphic information on the other side of the PET substrate with the photolithography information layer; After the PET substrate with the photolithography information layer is placed in the paper feeding unit of the digital quick printing machine, the other side of the photolithography information layer is digitally printed with graphic information and registered with the photolithography information pattern; Step 3: Use a laminating machine to laminate the pre-coated high-gloss aluminum film with the photolithographic information layer of the PET substrate; The laminating machine in step 3 uses a small pre-coating laminating machine, and the pre-coated high-gloss aluminum film is a pre-coated high-gloss aluminum BOPP film. The pre-coated high-gloss aluminum BOPP film is produced by: firstly coating a glue layer on one side of the BOPP film, and then performing BOPP vacuum aluminum plating on the other side to produce the pre-coated high-gloss aluminum BOPP film; Step 4: After completing the replication of the photolithographic information layer and the printing layer using a double-sided coated PET substrate, the finished product is laminated with paper using glue; Step 5: After mounting the paper, use semi-automatic equipment to complete the hot stamping, silk screen printing or embossing process according to the needs of the proofing process; Step 6: Use a die cutter to die-cut the printed material into the finished box.

2. The digital proofing and printing method for photolithography positioning paper according to claim 1, characterized in that: The aluminum plating thickness of the pre-coated high-brightness aluminum BOPP film is at least 400A.

3. The digital proofing and printing method for lithography positioning paper according to claim 1, characterized in that: The step 4 includes the following specific steps: Use LIWANDA062 desktop glue machine to mount the high-gloss aluminum film layer of the PET base with white cardboard using water-based white latex glue.

4. The digital proofing and printing method for lithography positioning paper according to claim 3, characterized in that: The white cardboard is 225g, 170g or 130g.

Images