Phenomenon: 

At present, most ink manufacturers have gone through the 0.2 μ m terminal filtration system and passed the factory test before ink filling, but after storage, transportation and sales, when the customer's inkjet printer is used, it can not achieve satisfactory results, which may not be a good completion of the ink stabilization process. 

Reason: 

We analyze the causes of ink plug from the principle of fine chemical industry. 

The production process of ink can be divided into two processes; the first process is the process of grinding and dispersing pigment aggregates (pigment raw materials) into their original particles with the help of external mechanical force, which is called depolymerization process. 

The second process is to continue to uniformly and permanently disperse the depolymerized pigment particles into the solvent, and without external mechanical force, there will be no process of re-coalescence of pigment particles to form pigment aggregates, which we call the stabilization process. 

The process of depolymerization is easy to complete, and even if the dispersion equipment is backward and the depolymerization is not complete, it can be completed completely through the fine filtration system. 

Only the ink that has well completed the stabilization process is a really good quality product. 

On the contrary, the violent Brownian motion will be caused by the high surface energy of the original particles with high surface area, and the original particles in the motion will inevitably collide with each other. In the process of collision, due to the strong and close van der Waals gravitation, the particles will attract each other and coalesce with other particles, which we call secondary coalescence. 

The secondary coalescence and flocculation of pigment particles will lead to the increase of ink viscosity, resulting in sprinkler broken plug, especially when the temperature is low in winter, the increase of ink viscosity is greater, the plug phenomenon is more serious. 

The sprinkler plug caused by viscosity deviation is called pseudo-plugging; if the extremely unstable ink system causes a large number of particles to agglomerate, flocculation leads to ink precipitation and causes sprinkler channel blockage, it is called true plugging.