Ceramic screen printing ink

Paper with ink: oil-based inks, water-based ink, high light ink half-light type ink evaporation drying ink, natural drying ink, paint papier-mache ink, plastic, synthetic paper-based inks, paperboard cartons type ink.
Fabric with the ink: aqueous ink, oil ink, emulsion ink.
Timber with ink: water-based ink, oil-based ink.
Metal inks of different metals: aluminum, iron, copper, stainless steel and other special ink.
Leather with special ink ink: printed leather.
Glass ceramic ink: glassware, glass crafts, ceramic ware ink.
Plastic Ink: PVC with ink, the styrene with ink, polyethylene with ink, propylene with ink, etc..
PCB ink ink: conductivity, corrosion resistance, ink resistance, plating resistance and fluorine, and the alkali resistance of ink.

Plastic screen printing ink must have conditions
1, the ink on the plate should not be dry conjunctiva, and when printing to the requirements of the substrate surface quickly fixing dry, and good adhesion.
2, the ink should have a loose, short, thin, sliding characteristics, in order to ensure the ink on the printing plate is easy to coating uniformity. Small force under the conditions easily over the net. Graphic clarity of offset printing products.
3, when the ink is coated on the plate, the ink viscosity, viscous consistency should be a certain stability to guarantee consistency of printing quality and printing carried out smoothly.
4, after printing, the ink on the plate to be easy to clean, to ensure that the plate can be reused.
5, to ensure that certain concentration of color printing products. For a color pattern, to ensure that its normal color.

Toning method
Called color is more than two colors, or in addition to the primary toner colors and then to use a small amount of color adjacent to the formation of a combination of color. Color ink before deployment, the first color samples need to be formulated on color alone exposed correctly distinguish the original (or AS) colors, primary colors, secondary colors, or complex color. If it is between color, complex color, you need to identify the proportion of the main color and the secondary color. Must be followed according to the tone of the original instructions, sample debugging, to be compared with the original color chromatic aberration is smaller or equal before a large number of deployment, and the time is shorter, adjust the amount to be appropriate. The tune is too small, resulting in downtime, the ink hue varies, affecting the normal production; too much unnecessary waste. The tune the ink usually in the stable or the light is not exposed to the direct rays of light.

Precautions
a.  With ink should be minimal plus different color ink, color ink types the less, the better the mixing effect.

b.  "Deep" principle, regardless of the preparation of light-colored or bright color ink When hue close boilerplate, be careful. Different ink manufacturers, best not to mix calls, maximize the use of the different colors of the same manufacturer ink toner, or will cause uneven tone of the phenomenon, and in severe cases cohesion leaving ink scrapped.
c.  Some screen printing ink is drying to dry, light-colored dried than unseasoned more shallow, dark dried darker. Further, the color tone of the ink prior to drying and after drying at the time of printing, whether the difference is easily overlooked. General, by natural drying (evaporation of the solvent-based inks), the substrates are plastic, metal, paper, glass, etc., color will not change; but if it is used in ceramic colorant, since the ignition oxidation after chromogenic , only to experience toning. By thermosetting curing dry screen printing ink color shades on change, mentioned above. Transfer ink volume, you can use the Mexican machine, toner can be completed in a short period of time.

Preservation and longevity of the screen printing ink
a screen printing inks should be stored in a cool, dry place, can UV ink, must be placed in a refrigerated cabinet, and avoid the irradiation light!
b. unopened cans ink shelf life of 12 months, as soon as can, in principle, more than six months!
c. different brand different series ink not mixing

The following photos are for reference
Specific packaging to prevail in kind

ceramic screen printing ink

ceramic screen printing ink

ceramic screen printing ink

ceramic screen printing ink

ceramic screen printing ink

ceramic screen printing ink

The main component of the plastic screen printing ink
(1) colorant
Include pigments and dyes. The pigment in the ink in addition to color effects, but also so that the ink having a hiding power. In addition to the ink lightfastness, heat resistance, solvent resistance, and chemical resistance is also affected.
(2) link to material
Link material is part of the fluid in the ink. It from the link role, colorants, fillers, and other solid substances dispersed therein, conducive to a uniform transfer of the ink printing. Another important role, so that the ink can be dried on the surface of the substrates, solid and film deposition.
Link material is the key to determine the ink performance factors, the different types of ink, usually use a different nature of the link material. The link material including resins, oils, solvents, etc..
(3) Additives
The additives are added in order to improve ink printability and various auxiliary agents, mainly defoamers, diluents, plasticizers, ultraviolet absorbers, dried adjusting agent. Printing is usually simply added.

ceramic screen printing ink

Screen printing is a printing technique that uses a woven mesh to support an ink-blocking stencil. The attached stencil forms open areas of mesh that transfer ink or other printable materials which can be pressed through the mesh as a sharp-edged image onto a substrate. A fill blade or squeegee is moved across the screen stencil, forcing or pumping ink into the mesh openings for transfer by capillary action during the squeegee stroke.

Screen printing is also a stencil method of print making in which a design is imposed on a screen of polyester or other fine mesh, with blank areas coated with an impermeable substance, and ink is forced into the mesh openings of the mesh by the fill blade or squeegee and onto the printing surface during the squeegee stroke. It is also known as silkscreen,serigraphy, and serigraph printing. You can also have more than one colour printing, for example you could have a striped printing.

Printing technique

A screen is made of a piece of mesh stretched over a frame. A stencil is formed by blocking off parts of the screen in the negative image of the design to be printed; that is, the open spaces are where the ink will appear on the substrate.

Before printing occurs, the frame and screen must undergo the pre-press process, in which an emulsion is 'scooped' across the mesh and the 'exposure unit' burns away the unnecessary emulsion leaving behind a clean area in the mesh with the identical shape as the desired image. The surface (commonly referred to as a pallet) that the substrate will be printed against is coated with a wide 'pallet tape'. This serves to protect the 'pallet' from any unwanted ink leaking through the substrate and potentially staining the 'pallet' or transferring unwanted ink onto the next substrate. Next, the screen and frame are lined with a tape. The type of tape used in for this purpose often depends upon the ink that is to be printed onto the substrate. These aggressive tapes are generally used for UV and water-based inks due to the inks' lower viscosities. The last process in the 'pre-press' is blocking out any unwanted 'pin-holes' in the emulsion. If these holes are left in the emulsion, the ink will continue through and leave unwanted marks. To block out these holes, materials such as tapes, specialty emulsions and 'block-out pens' may be used effectively.

The screen is placed atop a substrate. Ink is placed on top of the screen, and a floodbar is used to push the ink through the holes in the mesh. The operator begins with the fill bar at the rear of the screen and behind a reservoir of ink. The operator lifts the screen to prevent contact with the substrate and then using a slight amount of downward force pulls the fill bar to the front of the screen. This effectively fills the mesh openings with ink and moves the ink reservoir to the front of the screen. The operator then uses a squeegee (rubber blade) to move the mesh down to the substrate and pushes the squeegee to the rear of the screen. The ink that is in the mesh opening is pumped or squeezed by capillary action to the substrate in a controlled and prescribed amount, i.e. the wet ink deposit is proportional to the thickness of the mesh and or stencil. As the squeegee moves toward the rear of the screen the tension of the mesh pulls the mesh up away from the substrate (called snap-off) leaving the ink upon the substrate surface.

There are three common types of screenprinting presses. The 'flat-bed', 'cylinder', and the most widely used type, the 'rotary'.

Textile items printed with multi-colour designs often use a wet on wet technique, or colors dried while on the press, while graphic items are allowed to dry between colours that are then printed with another screen and often in a different color after the product is re-aligned on the press.

Most screens are ready for recoating at this stage, but sometimes screens will have to undergo a further step in the reclaiming process called dehazing. This additional step removes haze or "ghost images" left behind in the screen once the emulsion has been removed. Ghost images tend to faintly outline the open areas of previous stencils, hence the name. They are the result of ink residue trapped in the mesh, often in the knuckles of the mesh (the points where threads cross).

While the public thinks of garments in conjunction with screenprinting, the technique is used on tens of thousands of

items, including decals, clock and watch faces, balloons, and many other products. The technique has even been adapted for more advanced uses, such as laying down conductors and resistors in multi-layer circuits using thin ceramic layers as the substrate.

Versatility

Screenprinting is more versatile than traditional printing techniques. The surface does not have to be printed under

pressure, unlike etching or lithography, and it does not have to be planar. Different inks can be used to work with a

variety of materials, such as textiles, ceramics, wood, paper, glass, metal, and plastic. As a result, screenprinting is

used in many different industries, including:

Balloons

Clothing

Decals

Medical devices

Printed electronics, including circuit board printing

Product labels

Signs and displays

Snowboard graphics

Textile fabric

Thick film technology

Screen printing press

To print multiple copies of the screen design on garments in an efficient manner, amateur and professional printers usually use a screen printing press. Many companies offer simple to sophisticated printing presses. Most of these presses are manual. A few that are industrial-grade-automatic printers require minimal manual labor and increase production significantly.

Analysis of screen printing trends and prospects

screen printing market space

China from the 20th century, 80 years, the speed of screen printing materials, equipment, technology research and development, so that screen-printing with flexo printing, offset printing, gravure played an advantage in competition. Rate of 7% annual increase. Currently there are about More than 70% of the wide format color screen printing with spot-color printing, nearly 30% using four-color overprint, and the proportion of four-color overprint is still increasing steadily. Industry survey showed that 70% of the annual output value of enterprises 100 million. But China's current total output value of the printing screen printing production value less than 2%, which have great potential to be tapped and broad development prospects.

The next screen printing will remain a high growth rate will gradually increase the technical, industrial scale will be further expanded. Authorities predicted that the future world production of screen printing in the printing share of GDP will rise to 10%. There is no doubt that China Screen Printing Industry is being nurtured the development of a larger space and potential market. Expected that by 2005 China will become the world's largest screen printing market. China screen printing in the future will be depth and breadth. "Deep" is to a higher level of development, international screen printing industry has long been widely used in computer design, plate making, carving and other advanced electronic technology, and our country for these new technologies are still in the research trial stage; "well" is the development of new screen printing products, such as outdoor advertising and other large-scale screen printing.

screen printing applications

Survey shows that China Screen Printing Industry and the number of kinds of products sorted by manufacturers as follows:signs and panels, textiles and garments, plastic sheets, advertising materials, printed circuits, light boxes and so on.Emerging field of screen printing to an extraordinary rate, such as building materials, the system card, CD-ROM, security printing and so on.

1. Ad print

Screen Printing in commercial advertising, there will be more market, some large companies, especially electric companies,tobacco companies promote their image in order to attach great importance to the role of advertising. Advertising time and to some extent determine the quality of the company's share of the market. Therefore, all kinds of electrical advertising,packaging and advertising, outdoor advertising, commercial ads to screen printing provides a broad space. In the commercial competition, because the large-scale outdoor advertising a wide field of vision, effective and taken seriously. So, as our screen printing large color outdoor ads along with the development of commercial advertising, the increasing volume showed large, cheap, colorful, save a long period, and fast delivery advantages, more and more cities are planning departments,advertising approved by regulatory agencies, attracting a lot of advertisers.

2. Packaging and Printing

Packaging industry is the main service screen printing industry, target, screen printing technology continues to develop applications, will better serve the packaging and decoration industry, for packaging and decoration industry, while contributing to a more prosperous, but also for silk screen printing industry.