1. What is the composition of solvent ink? What is the role of each?
A: (1) Binder: It is a resin that mainly acts as a link to determine the smoothness, hardness, weather resistance, moisture resistance and other properties of the ink.
(2) Pigments: Determine the fineness, weather resistance, solvent resistance, and drug resistance of inks, and whether they contain heavy metals.
(3) Additives: Improve the printability of the ink.
(4) Solvent: It is used to adjust the viscosity, adjust the dry speed, increase the adhesion with the substrate, dissolve the resin as a linker and auxiliary agent, and disperse the pigment.
What are the five variables for screen printing?
Answer: Scraper hardness, mesh distance, printing speed, scraping pressure, ink suitability.
3, the ink is not stirred before adding the diluent right? why?
A: It is not correct to add diluent before mixing, because after the ink is subjected to external force (such as stirring), its viscosity will drop and dilute the thixotropic performance, so any ink must be thoroughly stirred after opening the jar to adjust the viscosity. .
4. What is the role of the solvent in the solvent ink?
Answer: (1) Dissolve the resin in the ink to make the adhesive. (2) Disperse pigments and solubilizers in inks to improve printability. (3) Dissolve and swell substrate, increase the adhesion of ink and substrate. (4) Adjust the viscosity to improve the printability of the ink. (5) Adjust the drying speed to meet the requirements of the screen printing environment.
5. If there is no problem with the quality of the ink, what are the causes of the bubbles in the screen printing process? How to deal with it?
A: The reason and solution: (1) The viscosity of the ink is not correct and must be diluted. (2) The speed of squeegee is fast, the net distance is large, and air bubbles are pulled out because the screen bomb is too fast from the substrate. (3) The wrong solvent is used, and miscibility with the ink is poor, so it is necessary to use a special solvent for the ink. (4) Use of a quick-drying solvent under conditions of high temperature and low humidity causes the surface conjunctiva to become too fast and bubbles appear. (5) Air bubbles due to the surface of the substrate are not easily wetted. (6) Ink expired.
A: (1) Binder: It is a resin that mainly acts as a link to determine the smoothness, hardness, weather resistance, moisture resistance and other properties of the ink.
(2) Pigments: Determine the fineness, weather resistance, solvent resistance, and drug resistance of inks, and whether they contain heavy metals.
(3) Additives: Improve the printability of the ink.
(4) Solvent: It is used to adjust the viscosity, adjust the dry speed, increase the adhesion with the substrate, dissolve the resin as a linker and auxiliary agent, and disperse the pigment.
What are the five variables for screen printing?
Answer: Scraper hardness, mesh distance, printing speed, scraping pressure, ink suitability.
3, the ink is not stirred before adding the diluent right? why?
A: It is not correct to add diluent before mixing, because after the ink is subjected to external force (such as stirring), its viscosity will drop and dilute the thixotropic performance, so any ink must be thoroughly stirred after opening the jar to adjust the viscosity. .
4. What is the role of the solvent in the solvent ink?
Answer: (1) Dissolve the resin in the ink to make the adhesive. (2) Disperse pigments and solubilizers in inks to improve printability. (3) Dissolve and swell substrate, increase the adhesion of ink and substrate. (4) Adjust the viscosity to improve the printability of the ink. (5) Adjust the drying speed to meet the requirements of the screen printing environment.
5. If there is no problem with the quality of the ink, what are the causes of the bubbles in the screen printing process? How to deal with it?
A: The reason and solution: (1) The viscosity of the ink is not correct and must be diluted. (2) The speed of squeegee is fast, the net distance is large, and air bubbles are pulled out because the screen bomb is too fast from the substrate. (3) The wrong solvent is used, and miscibility with the ink is poor, so it is necessary to use a special solvent for the ink. (4) Use of a quick-drying solvent under conditions of high temperature and low humidity causes the surface conjunctiva to become too fast and bubbles appear. (5) Air bubbles due to the surface of the substrate are not easily wetted. (6) Ink expired.
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