The main factors of dialysis ink refill

The ink-hammer printing plate is directly related to the agglomeration of the ink, so that the ink gelation and the vitrification of the printing ink film occur.

Properly increasing the pH or using inexpensive inorganic salts will allow the inks to regain their original printability. This will not only increase the flowability and water washability, but also reduce the resulting foaming or gelation. the reason.

1, excessive dispersion;
2. The ink absorbs moisture and causes flocculation / improper storage.
3. In the ink system, the pigment or filler is not resistant to the alkaline binder and is neutralized by the chemical reaction - accumulation.
4, ink mixed with paper scraps or plastic crumbs or fabric crumbs and so on.
5, using the wrong solvent, such as some amphoteric solvents or active solvent molecules began to associate to form micelle size aggregates.
6, the ink yield value is too high, the ink head is too short to become a cheese head, the pigment content is too high, in particular, the filler does not resist the alkaline linking material caused it to expand, the use of acidic solvents, reduced to a solid state, and then dissolved with the solvent.
7. The solvent volatilization gradient in the ink body is unbalanced, especially the balance of the true solvent and cosolvent (10-15), or the release (exothermic) or volatilization imbalance of the neutralizing agent and the neutralizing agent.
8, when the addition of ammonia into the carbon dioxide being absorbed hinders the charging of the particles, accelerated oxidation, promote the merger of oxygen molecules in the water, and excessive addition will also affect the gloss.
9. After the ink is exposed to the air, the oxide film is mixed into the ink particles, and the ink may have precipitated particles or inks that are not uniformly dispersed.
10, resin monomer composition, especially acrylic resin, when the acrylic monomer to 30% will disappear.
11, suction ink is too strong, Baotuan, uneven dispersion will cause poor ink transmission.
12, although the addition of white carbon black can overcome the ink delamination and ink precipitation, but the excessive addition will result in no flow and graphic ink after the film to reduce the gloss.
13, Although the relative density of pigments or fillers is the same, but the particle size is not equal, it will also be in the state of deflocculation.
14, ink in the invasion of acid, resulting in milk cool or gel.

Reprinted from: "Guangdong Printing"