How to control the ink

In the printing process, no matter what kind of printing, whether it is multi-color or monochrome printing, the primary problem encountered before printing is the deployment of ink color, so the ink color selection and deployment are often required. The deployment of ink color is the most important part of printing. The true reproduction of colors directly affects the product quality and market share. In some large-scale enterprises, there are not only specialized dispensers, but also the best. Make customers happy.

While controlling the property parameters of the ink well, the desired printing product must be obtained when using the ink. The method used must be correct. The performance of the ink should be monitored before, during and after printing. The printing environment should be monitored. And storage conditions such as temperature, humidity, cleanliness, and air flow can all affect the performance of inkjet inks.

In addition, after printing, inkjet inks may also be exposed to undesirable environments such as UV rays, ozone, adhesives, and corrosive environments. All of these factors may degrade the quality of the printed product. The type of ink may be selected as needed to ensure that both the prepress and postpress can meet the needs of the printing environment. Inkjet ink is a chemical product and it should be properly handled to ensure safety. The MSDS Material Safety Data Sheet is a guide to operations that ensures that ink storage, use, transportation, and disposal are all performed under the specification.

The best equipment does not necessarily get the best prints. For ink-jet printing, choose the right ink, deeply understand the applicable range of various types of ink, adjust the ink parameters, monitor the ink change in the inkjet printing process, and control the environment of the workshop. Only in this way can the stability of production be maintained. And the quality of the product.

In inkjet printing, in order to ensure the results, we must do a more appropriate control of the parameters of the printing ink, water-based ink, for example, the conditions for printing control are the following:

1. Surface tension (30 to 60 dyne/cm). Micro Piezo Inkjet systems require lower surface tension, and bubble jet systems require higher surface tension.

2. The drying speed is just right. Too fast and easy to plug the inkjet head or break the ink, too slow to spread, so that the dot overlap is serious.

3. Shelf life. It takes up to three months, usually one year, for the ink to be manufactured from the factory to the end of the consumer's use. Generally, the ink must be able to pass through a 0.2μm filter for one year.

4. Thermal stability. The thermal stability of the dye for the bubble jet system is better because the ink of the bubble jet system is heated to a high temperature of 400[deg.] C., and if the dye does not withstand high temperatures, it will decompose or discolor.

5. In order to not block the inkjet head, it must pass 0.2μm filter.

6. The sodium chloride content must be less than 100ppm. Sodium chloride causes the dye to settle, and sodium chloride is corrosive, especially in bubble jet systems. Although the nozzles are all made of titanium, they are still corroded by sodium chloride at high temperatures. .

7. With buffer solution effect. The pH of the ink is stable and some dyes will precipitate due to changes in pH.

8. Viscosity control (1 to 5 cp). Micro Piezo Inkjet systems have a higher viscosity requirement and bubble jet systems have lower viscosity requirements.