Water-based UV screen printing ink features and use (below)

Use of water-based UV screen printing inks

(1) Product use process


(2) How to use the product

• Storage room temperature 5 ~ 30 °C, the use of ambient temperature to 20 ~ 30 °C is appropriate, too low temperature will make the ink viscosity becomes larger or smaller. The room temperature is stable, the printing operation conditions can be guaranteed, and the quality of the printed matter is stable. Note that changes in the spring, summer, autumn and winter seasons, and temperature changes in the morning, evening and evening may cause different operating temperatures. It is necessary to put a temperature and humidity table next to the printing press.

· The thixotropy of this product is large, the viscosity will be reduced to some extent after fully stirring, and the stirring time before use is not less than 5 minutes. When it is necessary to reduce the viscosity, please use the supporting diluent and mix it while stirring. The amount should not exceed 8%. Do not mix with other inks.

Use 350-450 mesh high-tensile PET monofilament mesh (even after coping treatment) and use aluminum alloy mesh frame stretch net, so that the tension reaches 18 to 24 Newton; Water and oil dual-use water resistance can be film release photosensitive adhesive plate. The thickness of the ink wet film is mainly determined by the mesh number of the screen and the thickness of the paste. The adhesive layer is required to be 4 to 5 μm, and the ink film is guaranteed to be 6 to 8 μm. The ink layer having a thickness of more than 10 μm has a slow drying speed, and the adhesion and bending resistance are affected.

• Use a special 80oUV polyurethane blade, because some of the resin material in the ink has a swell effect on the blade. When the blade is not suitable for printing, it is necessary to rotate, grind, and reverse until it is replaced.

· This product is best suited for Taiwanese South Asian companies printing on coated PI synthetic paper PVC, KT board, Andy board and plain paper. The printability of other substrates should be based on trial and print evaluation.

· A new print and a new substrate should be prepared for preliminary testing and a comprehensive evaluation of the process capabilities and the printing of various indicators such as: adhesion, bending resistance, etc., master and determine the parameters. At the same time, it is also necessary to convey related knowledge and operating techniques to relevant personnel.

· It is not a simple matter to select and purchase a better curing machine. High and stable unit power and low calorific value are the most important performances. High pressure mercury lamps or metal halides with unit power above 120 W/cm must be equipped. Lights and effective heat dissipation mechanism. After the lamp is used for a period of time, the light intensity will decrease.
Light intensity changes should be regularly monitored for necessary adjustments or replacements. The heat generated by the lamp should have an effective cooling method, adjust the appropriate lamp distance and belt speed, so as to avoid thermal deformation of the printed material caused by overprinting is not allowed or even scrapped.

· There are differences in the curing conditions of different colors of ink. Generally, the order from easy to difficult is red, yellow, black and black. The mixed color of the printer's own blend must be tested to know the exact curing conditions. The ink layer after the light irradiation does not reach the optimal degree of curing immediately, and the stable adhesion can be achieved in 24 hours.

• When multicolor printing is performed in different colors, the front color cannot be cured excessively, and the first color must be used with a suitably fast tape speed, because excessive surface curing reduces the surface energy and affects the adhesion of the latter color. The specific control method acquires data during the preliminary test.

• Insufficient adhesion often results from insufficient curing, and this problem is mainly concentrated on the use of black ink. The black ink has a large absorption capacity for light, so that the light energy received by the photoinitiator is reduced, the curing is slow, and the gap between the printing plate and the substrate is appropriately enlarged during printing to form a thin ink layer as much as possible.

· When it is necessary to reduce the color density, use a colorless ink; when a high gloss effect is required, cover the bright oil, and you can also choose to use the high-light series ink.

· Uncleaned screens should not be placed in places with light; when cleaning screens, they can be scrubbed with industrial alcohol, then washed with detergent solution, washed once with 783, and then removed and ghosted. Rinse with clean water and dry completely.

• The ink is valid for 6 months from the date of production. Products that have passed the valid period can still be used normally after they have been inspected and tested for effective use. When the ink is not used, the lid must be tightly closed and stored in a cool, shady and cool environment. Recycling inks are packed in empty buckets to avoid contamination of new ink.

• If a printer using solvent-based inks for many years prepares to switch to UV-based water-based inks, there is a need for comprehensive new knowledge and new skills training from managers to producers, as ink suppliers are very willing to provide help within their capabilities.

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FAQ :

Q1:Is it available to get samples before ordering?

A:We are very glad to provide sample for you to check quality first and set up the cooperation between us.

Q2: How about payment terms ?

A: 30% deposit, 70% before shipped,after mass production pic shared.

 


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