Publish：Professional producer of cost-effective screen printing machines, flexo printing machines and cutting machines for label ribbons Time：2019-03-20 Views:1049
Most of people don‘t know how the screen printing works, today Eboyuan( Ningmeng Screen Printining Machine Professional Producer) tell
you the basic operation principles of screen printing.
Screen printing is a push-through process where ink is pushed through a fine fabric (screen) made of plastic or metal threads.
The non-image areas of the screen are covered with a stencil.
The screen is flooded with ink which is pushed through the image areas of the screen onto the substrate by means of a squeegee.
In order to tension the screen fabric, it is attached to a screen frame.
The ink layer is then dried via evaporation, oxidation, or polymerization.
The thread count and the mesh thickness determine the open screen area.
This area should be large enough to pass though the pigments and fine enough to provide safe anchoring of the screen onto the smallest parts of the stencil.
The stencil that is typically made of photopolymer is placed on the opposite side of the screen than the squeegee to avoid its wear.
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The thickness of the ink layer depends on the thickness of the stencil that ranges from 12 to 100 µm.
The print quality is determined by the screen material, the fineness and thickness of the screen, as well as the degree of the open area of the screen.
The screen fineness is typically 90-120 fibers/cm.
In order to produce high print quality, the screen fineness should be approximately 3-4 times greater than the screen resolution(lines/cm).
In addition, the ink, substrate, and squeegee properties and the print conditions affect the print quality.
If you want to know more about screen printing knowledges or have any interesting in screen printing for your business line, welcome to E-mail us : nmeng.may@gmail.com or eboyuan.yuki@ecodigitalprinter.com
Yuki Wong
CNY-yuki
'info@iprintingpress.com'
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