8. Viscoelastic.
Viscoelasticity refers to the property that the ink is sheared and fractured after pressure is applied to the plate, and the screen plate springs up and the ink rebounds quickly. Bonding of the ink and the substrate, and the detachment of the screen, the phenomenon of rapid retraction, is a typical ink viscoelastic phenomenon.
The viscoelasticity of the ink, which has a greater effect on the screen printing, is the phenomenon of drawing. The drawing phenomenon is that when the squeegee is scratched and the screen is bouncing up, many ink filaments appear between the screen and the substrate. This is the most bogey phenomenon in silk screen printing. It is not only easy for the printed matter and screen plate to be dirty, but even for printing.
The length of the drawing is related to the viscosity of the ink. The viscosity is large and the ink is long; otherwise it is short. For this purpose, the viscosity of the ink is reduced, the viscosity of the ink is improved, and the drawing phenomenon is reduced.
The drawing phenomenon is also related to the time of action. In the same ink, if the separation speed is rapidly split by elasticity, the ink is short; the separation speed is very slow, and the ink flows completely like a pure liquid and does not become filamentous.
Viscoelasticity refers to the property that the ink is sheared and fractured after pressure is applied to the plate, and the screen plate springs up and the ink rebounds quickly. Bonding of the ink and the substrate, and the detachment of the screen, the phenomenon of rapid retraction, is a typical ink viscoelastic phenomenon.
The viscoelasticity of the ink, which has a greater effect on the screen printing, is the phenomenon of drawing. The drawing phenomenon is that when the squeegee is scratched and the screen is bouncing up, many ink filaments appear between the screen and the substrate. This is the most bogey phenomenon in silk screen printing. It is not only easy for the printed matter and screen plate to be dirty, but even for printing.
The length of the drawing is related to the viscosity of the ink. The viscosity is large and the ink is long; otherwise it is short. For this purpose, the viscosity of the ink is reduced, the viscosity of the ink is improved, and the drawing phenomenon is reduced.
The drawing phenomenon is also related to the time of action. In the same ink, if the separation speed is rapidly split by elasticity, the ink is short; the separation speed is very slow, and the ink flows completely like a pure liquid and does not become filamentous.