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The Process Flow of Screen Printing

The difference between traditional process and gold silk process, and the specific process flow breakdown explanation.

The traditional process is as follows

Screen printing file output → Film production → Screen production → Exposure → Development → Drying → Color matching printing → Ink curing

The Process of Golden Brand Is As Follows

(The difference is that it saves the step of opening the film and directly produces the screen through the laser plate making machine (CTS), reducing error rate and increasing work efficiency)

Screen printing file output → Screen printing production → Development → Drying → Color matching printing → Ink curing

Explanation of specific process flow breakdown

Screen Printing file output

The designer receives the artwork from the client (in formats such as AI/CDR/PSD/PDF, with vector files being the best) and splits the layers of the artwork for pre printing color separation.

Because the narrow definition of screen printing can only be monochrome printing and monochrome overprinting, designers need to layer the documents,

Layering according to single effects, including color layering, as well as layering according to different ink models, thickness, transparency, graphic variation levels, mesh size of the screen, and number of lines in the film.

After the layering is completed, attention should also be paid to the order of each layer, as different orders can also affect the final effect of screen printing.

The principle of screen film production technology

Screen film production technology is the use of photosensitive materials to produce screen films.

In the production process, the photosensitive material is first coated on the screen, and then exposed and developed under a light source to cause a chemical reaction of the photosensitive material under the action of light, thereby forming the pattern of the screen film.

Fully automatic digital tension screen production

Apply adhesive to the mesh, place the mesh frame, adjust the mesh clip, tension the mesh, top the mesh, and cut the mesh frame

Compared to traditional manual mesh pulling, Jinbo uses a fully automatic digital mesh pulling machine.

(Digital control, precise and stable, consistent warp and weft tension, more time-saving and convenient)

1.Apply adhesive mesh adhesive:

First, apply a layer of adhesive to the mesh frame image. After applying it once, wait for the adhesive to dry before applying a second layer, which is called primer.

2.Mesh frame:

Place the frame with the bottom glue on the wire drawing machine and place it properly. There are two ways to place it: one is to parallel the edge of the wire drawing machine, which is called straightening the wire. One type is to place it at an angle with the edge of the wire mesh machine, called a diagonal mesh.

3. Adjusting the mesh clip:

After laying the frame, adjust the mesh clips. The number, length, and position of the mesh clips on both sides of the pulling machine should be symmetrical. There should be no gaps between the mesh clips, and ensure that each clip can be tightly clamped without running the mesh.

4. Tensioning net:

When clamping the silk screen into the mesh clip, it should be very careful to keep the warp and weft threads of the silk screen parallel to the edge of the mesh clip and as straight as possible. Do not pull the mesh at an angle. The mesh will be tightened every 20 minutes and the tension will be tested.

5. Top net:

After pulling the mesh, lift the mesh frame and start brushing glue to fix the mesh on the frame.

6. Cutting frame:

After the glue is completely dry, you can reset the wire drawing machine, cut off the wire frame, and mark the information.

 

Brush on photosensitive adhesive and dry:

Apply photosensitive material and dry (the entire process of sizing must be carried out in a dark room, and the photosensitive material must not be exposed to strong light)

Traditional exposure:

Select the film image that needs to be made into a plate, paste it onto the glossy surface of the mesh frame, and make it tightly adhere without any gaps. Place the mesh frame after pasting the film on the exposure machine (the exposure time is adjusted according to the light intensity of the exposure machine). Put the exposed screen into the developer for development processing, so that the unexposed part of the photosensitive material is washed off, forming the pattern of the screen film.

           

To produce an online version through a laser plate making machine (CTS):

Firstly, use a computer to create the graphics, images, text, etc. to be carved. Specialized computer image software will convert the graphic and textual information of the original manuscript into executable parameter data related to modulation of laser beams, such as depth, size, and shape. Then the control system controls the movement of the laser beam based on commands. Laser acts on the surface of materials and uses the energy of laser to engrave graphic and textual information onto a screen.

High efficiency: Expose 1 square meter of mesh in just 3 minutes; Accurate exposure alignment, saving printing preparation time, and reducing manual labor

Low cost: As there is no need for film, it prevents quality problems caused by film wear and unstable expansion and contraction. At the same time, film prices are higher, saving a lot of costs; Shorten the three steps of the traditional work exposure process to one step of the CTS workflow, achieving the goal of rapid plate making.

Developing and drying

Soak the exposed mesh frame in water for 1 minute, rinse the frame with a water gun, rinse the photosensitive paste of the pattern thoroughly, wipe it clean, and put it into a dryer for drying.

Color matching

  • Digital color matching: Based on computer color matching software, determine the color matching ratio.
  • Weighing: Take the ink corresponding to the color code and weigh it using an electronic scale.Mix a small amount of auxiliary color ink with the main color ink multiple times and mix evenly.
  • Comparison of colors: When color deviation is found, a small amount of ink can be added for fine adjustment until the blended color is basically consistent with the color sample.
  • Record; After the ink is mixed, record the proportion of the primary ink used, the type and amount of diluent, the ink model, and the factory batch number for future use.

Printing, fixed color

Place the screen plate on a silk screen platform with the substrate material laid out, and use a scraper to transfer ink through the holes of the plate to the substrate through a certain pressure, forming an image or text. The number of scraping times depends on different process requirements.

During the process, the master needs to repeatedly observe whether there will be foaming, blocking, poor adhesion, skewness, impurities, and other adverse conditions before making repairs and adjustments

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