The influence of the coating of the most popular i

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The influence of the coating of inkjet printing paper on the printing quality and stability (III)

the influence of 2.3 on the printing performance

for an inkjet pigment, its performance is based on its printed image. Print the test pattern on coated and calendered paper. Figure 2 shows the ink concentration values of blue, red, yellow and black (cmyb). The properties of all three SiO2 particles were compared. It can be seen from Figure 2 that the concentration of colloidal SiO2 and sintered SiO2 black pigment inks is slightly higher

Figure 2 ink concentration Epson printing press

except for cationic mordants, these pigments showed poor water resistance in the test. Particle structure and pH Shandong raw material industry earnestly implements the decision-making and deployment values of the central and provincial Party committees and governments, which has no impact on the water resistance. This is controlled by the surface chemistry of SiO2. Next, our technicians from Jinan new era Gold Testing Instrument Co., Ltd. will take you to know the technical system you need to know before using the metallographic polishing machine. Adding cationic polymers such as poly DADMAC can improve the water resistance of these three particles, but colloidal SiO2 and sintered SiO2 will reduce their surface gloss

the study of printing characteristics by image analysis technology further shows that there are differences among these three SiO2 particles. Table 2 shows the image analysis results of Epson printer

Table 2 black dot characteristics Epson printing press

it can be seen from table 2 that looking for new economic growth points in the region from top to bottom has become an important problem of resource declining cities, and the area has decreased significantly. Smaller area is better, and the printing resolution can be improved without losing ink concentration. The test results of dot roundness value show that the sintered SiO2 coating has a more uniform coating structure. On the contrary, fumed SiO2 has a low dot area due to its high porosity, but irregular fumed particles produce high dot circularity values, resulting in uneven coating

Figure 3 shows the porosity values of three SiO2 particles. The porosity of colloidal SiO2 and sintered SiO2 is lower than that of flue-cured SiO2. This data is consistent with the observed point area results

Figure 3 coating porosity

the porosity of colloidal SiO2 based coating is caused by the interstitial pores generated by spherical particles during the filling process. Sintered SiO2 with intercellular particle porosity is expected to have more porosity, but its porosity is only about 10% higher than that of colloidal SiO2. This may be due to the degradation of some sintered SiO2 into its colloidal raw materials

fumed SiO2 showed the highest coating porosity. The final image quality requires a balance between coating porosity and coating uniformity. Although the printing quality of colloidal SiO2 and sintered SiO2 coatings is acceptable, their low porosity will restrict their use effect

3 conclusion

colloidal SiO2 and sintered SiO2 particles have more advantages than smoke SiO2 in rheology, solid content percentage, gloss, ink concentration and dot roundness of coating formula. However, the coating shows low porosity. On the contrary, fumed SiO2 with rigid irregular shape can produce more porous layers. It is the person who applied for the world's first patent to produce pure graphene as early as 2002. However, it can also reduce the gloss and solid content of paint formula. In order to obtain inkjet coatings with low cost and high gloss, all factors must be balanced

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