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WHAT IS SCREEN PRINTING AND SHARING EVERYTHING ABOUT SCREEN PRINTING TECHNIQUES

WHAT IS SCREEN PRINTING AND SHARING EVERYTHING ABOUT SCREEN PRINTING TECHNIQUES

In the field of printing and apparel today, screen printing is the most commonly used printing technique, and according to estimated statistics, about 70% of uniform orders use silk printing technique to printing, printing logos, slogans, etc. on shirts. And that is also one of the reasons why opening a silk screen printing factory will be the most effective business trend in the garment industry today.

Screen printing is so popular, however, those who do not work in the printing or garment industry will certainly still have many concerns and surprises when the two words “silk printing” are mentioned. So what is silk printing? Is the “silk” in the word “silk printing” the same as the “silk” in “silk fabric for ao dai”? Why is it called silk printing? What are the steps of screen printing and current applications of screen printing,… All of those questions, TALYNO will answer in detail, specifically and clearly in the following article. Don’t miss this article!

Before going to this article, we would like to make a small note, the information in this article comes from our actual experiences (because we are  working in the garment industry and providing custom t shirt screen printing in Dallas), secondly. is from the opinions shared by partners in the screen printing industry, and third is from the information we reference and synthesize on the internet (knowledge about screen printing is shared a lot on websites. , such as Wikipedia, silk-screen printing sites, etc. However, when we consulted, we found that each site only shared a certain aspect and did not fully summarize it, so it would be very difficult for those who are looking for information. believe).

WHAT IS SILK PRINTING? AN OVERVIEW OF SCREEN PRINTING TECHNIQUES

WHAT IS SILK PRINTING? ARE SILK PRINTING AND SCREEN PRINTING THE SAME?

Screen printing is a printing technique that uses a printing mold (including printing frame and printing mesh) to position the printed image, then uses a squeegee to spread the ink evenly, allowing it to seep through the printing mesh to adhere the ink to the surface. need to print.

At first, the printing screen (a thin mesh layer used to separate the ink and the object to be printed) was used by professional workers using silk material, so it was called screen printing. But in later years, when the printed mesh layer was replaced with other materials such as cotton fabric, cotton fabric, chemical fiber fabric, or even metal mesh (to increase the strength of the printed mesh),… then it has a new name: screen printing.

So, the essence between silk printing and screen printing is completely the same , it’s just different in name.

WHEN DID SILK PRINTING EXIST?

Silk printing (or screen printing) is a popular printing method and has been around for a long time. It appeared since 1925 in some Western countries and of course the silk printing technique back then was still simple but not as good as it is now.

By the 1870s, in France and Germany, people began to research the use of silk fabric to make printing screens, and it was not until 1907 that scientists in England researched the process of making printing screens using silk threads like now. And in the following years, screen printing technique began to develop and is popular to this day.

WHAT IS NEEDED FOR SCREEN PRINTING?

Current screen printing techniques can be operated manually, automatically, or semi-automatically. However, all must have the following components:

Materials to be printed : are the materials that you need to print images on, such as paper, elastic fabric, glass, metal, leather, etc.

Printing mold : is a rectangular or square wooden printing frame (depending on the size of the material to be printed) used to position the printing grid. It is the place where printing ink is stored and allows printing ink to pass through and penetrate onto the surface of the material to be printed.

The printing mesh part will be made of silk or any material, however, it will have 2 clear parts: The part that allows ink to pass through (printing element) and the part that is sealed to prevent ink from passing through ( non-printing element).

Printing ink : is a printing material (plastic, viscous, not liquid like other types of ink) to print on the material to be printed. Usually printing ink (or printing material) will be produced according to each basic color and kept separately in each box. Then there are screen printers who will mix a certain ratio of this color and that color to create a color. color tones as desired.

Scraper : The squeegee is usually made of wood, has many different lengths and shorts (depending on the size of the printing mold), used to evenly wipe the ink so that it penetrates the printing mesh layer to penetrate the surface of the object. Need to print?

Printing table : is a place to place and fix the material to be printed. Usually the surface of the printing table will be coated with a special glue solution so that the printed material does not move.

CLASSIFICATION OF SILK PRINTING TECHNIQUES

Currently, silk printing technique has developed to a new level, and it is transformed into many different names such as:

BASED ON THE PRINTING METHOD:

Screen printing on a manual printing table : this is a screen printing technique that is almost 100% done manually, from ink scraping to ink drying,…

Screen printing on automatic printing table : this is a screen printing technique that is operated completely automatically by machinery with high alignment and accuracy.

Screen printing on semi-automatic printing table : this is a screen printing technique that combines manual work and automatic machinery.

Considering the form of the printing die:

Screen printing using a flat screen : this is a printing technique often used when printing soft, flat materials such as fabric, paper, rubber, etc.

Screen printing using a circular screen : this is a screen printing technique often seen in glass printing factories, printing dishes, etc.

In addition, screen printing techniques are also classified according to printing method (direct printing, debonding printing, backup printing,…), according to ink flexibility (water printing, flexible printing, high printing,…),…

SILK PRINTING STEPS

Although screen printing is divided into many different techniques, whether printing manually, automatically, or semi-automatically, it all goes through the following main stages:

Step 1, Design and Export the movie

– This is the first step in the silk screen printing process chain

– To export film for screen printing, the printed image is designed in vector using software such as Corel Draw or AI.

– Each printed color will be output to a different transparent film board.

Step 2, Take film and create Mold

– Use a specialized glue solution to coat the printed mesh surface of the mold in the dark (I don’t know much about this solution), then let it dry.

– When the frame is dry, we proceed to take the film (using the transparent print board exported from the previous design file).

– The film board is placed on the glue layer of the printing mold and photographed with white light, or under sunlight

– After 2-3 minutes (depending on the glue solution), we take out the printing mold and spray the printing mold with water

– In the parts that are shaded by the film panel, the glue solution will not stick to it, and can easily be removed with water, and those areas will allow the printing ink to penetrate and stick to the surface of the printing material (printing element). )

– On the contrary, in areas that are not shaded by the film panel, the adhesive solution adheres to them and is sealed to prevent printing ink from passing through (non-printing elements).

– For each color, we have a different film palette and a different printing mold.

Step 3, Mix ink

– From the basic ink colors, the colorist will need to mix this color and that color to create the most suitable ink solution for the sample.

Step 4, Print on printing material

– Spread the material to be printed flat and fix it on the printing table (the printing table has an adhesive layer so it is easy to position the material to be printed).

– Position and place the mold in the printing position

– Pulling ink: use the scraper to spread the ink evenly through the printing mesh layer

– Dry the ink layer and continue to draw the ink (usually one printed color will be dried and repeated at least 2 times so that the ink adheres tightly to the material to be printed).

– Continue drawing ink with printing molds of other colors

Step 5, Dry and expose the material to be printed

– In order for the ink to adhere tightly to the printed material and not peel off, we need to let it dry for about 12 – 48 hours before starting the sewing process.

– Can be dried with a hand dryer, or automatic drying table, or dried in a shaded room.

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