Detailed steps for professionals to answer screen printing banners in 2000

1. Manual engraving method: write the pictures and texts on white paper by engraving machine or hand drawing (requires artistic skills)-dig out the parts to be printed (leaving the connected parts) with a utility knife-prepare the printed materials. If it is a dark cloth with mucilage and a light cloth with water slurry (nylon and other special fabrics have requirements on fastness, you can use ink)-prepare the mesh frame of 80- 120 mesh screen (polyester mesh is well taught)-prepare printing materials (cloth)-put the engraved words on the cloth-press it.

2. Photosensitive plate-making method: If the quantity is large and the content is the same, you can use this method to coat the prepared screen printing with photosensitive glue-lettering with flying film or computer and pasting it on the screen in time-drying the board with projection drying lamp (the general screen frame is 4m *0. About 9 meters)-water washing development-printing.

3. Self-adhesive method: use a computer to paste lettering on the screen in time and directly use it for printing. The key point is how to deal with the bad viscosity in time. You can burn it with a hair dryer and then press it, or add some glue to the strokes.

4. Thermal transfer: a popular production method in many places in China. Its characteristics are: good handle, good fastness, non-drying, no pollution and so on. , but the cost is slightly higher. Put screen-printed or offset-printed colored paper on the printed cloth (or carved and pasted with ready-made monochrome colored paper). After a few seconds 180 degree high temperature pressing, the pictures and texts are firmly printed on the cloth and become banners.

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The second tutorial

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Let's talk about the venue first

Of course, the more spacious the venue, the better, and the requirements are not too high. Don't let the wind blow in directly. Don't be too cold in winter. When the temperature reaches below zero, the version will freeze. Although the problem of frozen version is not difficult to solve, it will add some trouble after all.

It is better to have water, and it is better to have sewers. If not, you should do more exercise-drink clean water first, then drink dirty water.

Some people may think, how old is it? I want to print 30 meters and 40 meters long. What should I do if the space is not big enough?

Easy to handle, people are alive and banners are alive. The solution to this problem will be explained in detail later.

Say one more thing. Where can I print it? Better set a table. Of course, you can make some marks on the ground, but you will be tired. Think about it. What kind of position is printed on the ground? Bury your head in a vertical position to make people see that they are printing banners, but I don't know what they may think they are practicing.

The printing pad is also relatively simple to make and the cost is not much. The stent can be made by itself. The beams above should not be too few, not more than half a meter, and they should be as strong as possible. The minimum requirement is not to shake when sneezing. The height is about 75 cm, and the panel can be made of density board, so that the area of a table is 1.22X2.44, and banners or banners below 2# can be printed, which can be used for other purposes when banners are not printed. If the space is large enough, several more can be used alone or docked to form a table, which is more convenient for printing.

Spread a blanket on the panel first. Cheap acrylic blankets can be used, and paper blankets can also be used. After stretching the blanket, nail it around the edge of the board, and then spread two layers of cloth with good water absorption on it. Pay attention to separate and fix the two layers. Generally, the first layer does not need to be replaced, and the surface layer needs to be replaced in a few days.

It looks much more troublesome than using rubber directly, but there is much less trouble behind it-you don't have to dry the rag with a wet rag after printing.

In addition, such a countertop is more elastic, which is conducive to the close fit between the cloth and the screen.

Empty sieve plate

Wooden screen frames are generally used for printing banners, and aluminum alloy screen frames can also be used if conditions permit. Aluminum alloy screen frame shall be fixed with adhesive. The specific operation is discussed separately.

Banners are printed with single characters, which are light and flexible and easy to clean after printing, so the screen frame does not need to be too big, but it should be made into several sizes to meet the needs of banners with different widths.

Reference size:

50X70cm (frame size, hereinafter all) is used for folio paper, suitable for 70 and 90cm cloth; 36X50cm, used with quarto paper, suitable for printing 60cm cloth and fine print in two lines; 100X70cm, used with the whole orthographic paper, suitable for 120, 150cm wide fabrics and 3# and 4# flags; 30X 120cm, used to print small words, such as a line of address under the phone.

You can make several more, such as 60X80cm, for large banners of 70 and 90cm, 120X 180cm, for printing No.2 flag.

The general principle of selecting wood is to use small materials with big frames, such as 50X70cm, 3X5 or 4X4, and you can master them yourself.

Nylon mesh is generally used as a screen. Nylon mesh is cheap, high strength, good wear resistance, water resistance and elasticity, but it is malleable, and it becomes loose after a period of use.

Select the screen according to different printing materials. General transparent paste is about 120 mesh, and overprint paste is about 80 mesh. In addition, the screen mesh thickness is different. When printing overprint paste, the mesh is too fine, which will cause insufficient printing color. Pay attention when choosing.

When stretching the screen, first soak the screen for a period of time and fix it on the screen frame under a certain tension, so that the stretched screen has a certain tension. If it is too loose, it is easy to fade when printing, but it should not be too tight, because the tension of nylon mesh varies greatly in dry and wet conditions, and using it too tightly for several times will lead to deformation of the mesh frame. The screen can be fixed with nails, glue, etc. Generally, nailing method is adopted. The specific operation method has been described in another post of the altar. Generally speaking, it is similar to a stretched painting signboard. It should be noted that the latitude and longitude lines of the screen should be as straight as possible with the screen frame, and the whole screen should be as uniform as possible, otherwise it will be deformed in the future.

The used screen should be cleaned, otherwise it is difficult to remove the residual slurry after drying, resulting in waste board.

There is also a scraper, which can be made of polyurethane rubber. This scraper is more durable. Just buy the finished product directly. It can be bought at the distributor of screen printing materials. The length can be according to your own needs. It's best to buy long ones directly and cut them when necessary. It's simple. Just use an iron saw.

Clean the printed materials in time after using the screen and scraper, and avoid direct sunlight and sharp objects when placing them. Of course, stay away from stoves, heating, etc.

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It doesn't matter whether you add or not, but your attitude should be changed.