The following nine factors should be taken into consideration when purchasing a label printing ink:

In the selection of label printing inks, comprehensive consideration shall be given to the types of printing materials, printing methods and printing conditions, customer's special requirements, post-press processing techniques, label usage, usage conditions, and cost factors.

1. When selecting the label printing ink, we must fully consider the customer's requirements. Sometimes the customer may require the label to have some special effects, such as ice flower effect, sanding effect, anti-counterfeit effect, etc. At this time, it may be necessary to consider how to meet the special requirements of customers and products from the perspective of label printing ink.

2. Does the label go through some special processing processes along with the product it is pasting? What are the special requirements? This also has a certain influence on the choice of labels. For example, in the process of some products, the labels affixed to them may be subjected to high temperatures or exposed to certain chemical reagents. This requires label printing inks to have excellent quality. The high temperature resistance, chemical resistance, etc., otherwise it will cause the label deformation or damage.

3. The use of the label and the use of the environment is also a factor that can not be ignored when selecting the label printing ink, such as: the label used on the daily chemical cleaning products, usually requires its printing ink has good acid and alkali resistance, oil resistance and so on. Another example: In the outdoor use of the label, due to withstand the wind, sun and rain test, therefore, in the choice of label printing ink must pay attention to the ink in the light, water, high temperature, acid and alkali performance.

4. Cost factors. The goal of the company is to pursue the maximization of profits, which inevitably involves cost issues. In general, UV label printing inks have the highest prices, followed by water-based label printing inks, and solvent-based label printing inks have the lowest prices. Of course, the costs and costs of transportation, storage, etc. must also be considered. The performance indicators of label printing inks mainly include hue, fineness, saturation, gloss, adhesion, viscosity, and drying. These properties have a very important influence on the printing process and print quality.

5. The type and performance of printing materials is one of the most important factors in determining the printing ink for labels. Different substrates need different inks. For example, paper labels can be printed using aqueous inks, while film labels are usually printed using solvent inks. In addition, it is worth noting that even the same type of printing materials may use different inks if they have different types, grades or surface properties.

6. Printing methods and printing conditions are also one of the important factors affecting the selection of label printing inks. Different types of printing inks generally cannot be used or mixed, and the speed of printing, the type and performance of the printing equipment also have a certain influence on the choice of label printing ink.

7. Ink viscosity stability is one of the prerequisites to ensure the consistency of print quality. Too high or low ink viscosity is not conducive to printing. Therefore, the control of ink viscosity is very important. Generally speaking, in the printing process, as the moisture and solvent in the ink continuously evaporate, the ink viscosity will gradually increase, so the viscosity of the ink should be measured frequently, and the viscosity change record should be made and adjusted in time.

8. The dryness of the ink also has a great influence on the label printing. Drying too quickly may cause the pattern to be lighter or even dry. Drying too slowly may cause the ink to stick or the print to become dirty. In general, the drying speed of the ink should be compatible with the printing speed, the drying ability of the printing apparatus, and the area of ​​the printed pattern.

9. For water-based label printing inks, pH control is very important, usually between 8-9. Changes in the pH of water-based inks can also cause changes in viscosity. Therefore, an appropriate amount of pH stabilizer is added to the ink at regular intervals during the printing process.