Viscosity

It is the abbreviation of dynamicviscness. Generally, it is represented by Viscosity, that is, the shear stress of fluid flowing from the speed gradient in the direction of the stream layer, and the international unit is Pa/second (PA.S) or MPA.S. In PCB production, it refers to the liquidity that inks are promoted by external forces.

The conversion relationship of the viscosity unit:

1Pa. S = 10p = 1000MPa. S = 1000cp = 10dpa.s

plasticity

Refers to the nature before the ink is deformed by the external force. The plasticity of the ink is conducive to improving the printing accuracy;

THIXOTropic (Thixotropic)

The ink is gel when static, and the nature of viscosity changes when it is touched, also known as the degeneration and anti -flow hanging;

fluidity

(Filling) Ink, under the influence of external forces, expand to the surroundings. The flow is the countdown of viscosity, and the flow is related to the plasticity and tactileness of the ink. Plasticity and tactitivity are large, and the liquidity is large; With small liquidity, the network is easy to appear, and the phenomenon of ink is produced, also known as mesh pattern;

Adhesive

After scraping the ink is scraped, the performance of the ink that is cut and cracks quickly rebounds. It is required that the ink deformation speed is fast, and the ink rebounds quickly to facilitate printing;

Dryness

The better the dry ink is dry on the web version, and the better the ink after the ink is transferred to the print, the faster the request, the better;

Fineness

The size of the pigment and solid material particles, the PCB ink is generally less than 10 μm, and the fineness should be less than one -third of the meson opening;