UV Flatbed Printer Advertising Material Usage Techniques
2025-07-30 15:41
Analysis of the Relationship Between Screen Printing Ink and Solvents
Under normal circumstances, an appropriate amount of solvent can be added, and the evaporation rate of the solvent directly affects the drying speed of the ink. Adding solvent will thin the ink, causing insufficient coverage or unclear fonts. Generally, ink should not dry on the screen plate, and should begin surface drying about ten minutes after passing through the screen, which is the standard for screen printing ink. However, general screen printing ink does not have the problem of drying too quickly, and even in dry weather, there will be no obvious mesh clogging phenomenon. Once similar problems occur, the main reason is that the ink factory's formula has problems.
Let us now understand the close relationship between solvents and screen printing ink.
Analysis of the relationship between screen printing ink and solvents, the relationship between solvent volatility and screen printing.
Solvent Analysis in Screen Printing
Solvents are an indispensable material in screen printing and have a key impact on screen printing production and print quality. In screen printing, solvents are closely related to screen printing ink and must be given full attention. The following is a simple elaboration on this topic.
Functions of Solvents in Screen Printing
(1) Resin dissolution: Different resins require different solvents for dissolution (polar, non-polar).
(2) Flowability: Similar products produced by different manufacturers have different dissolving powers, which directly affect ink viscosity.
(3) Gloss: Similar or different solvents with different evaporation rates will cause fogging and whitening of the ink film when released in the printed ink film, thus affecting the gloss of the printed surface.
(4) Drying time: Due to differences in printing methods, printing environment, climatic conditions, and formulation requirements during printing operations, solvents with different boiling points are needed to provide appropriate drying time.
(5) Solvent retention: Some solvents with low affinity for resin help extend the open time of the printed ink film and reduce residual solvents.
Solvent Setting of Screen Printing Ink Properties
(1) Solvent: Solvents used to dissolve resins and stabilize viscosity in accordance with basic ink quality conditions during ink production.
(2) Co-solvent: Solvents with slightly weaker dissolving power used to assist in solving certain shortcomings in other conditions when the main solvent has excellent dissolving power but presents shortcomings in other aspects.
(3) Diluent: Solvents that do not have dissolving power for the ink's own resin, but when mixed with the main solvent, have dissolving functions to achieve the effect of reducing ink viscosity and diluting ink.
Analysis of the Relationship Between Screen Printing Ink and Solvents, the Relationship Between Solvent Dissolving Power and Screen Printing
(1) For the ink itself, good dissolving power makes the ink appearance have a uniform texture, gives the ink stable viscosity and flowability, is not easy to gel, and adding appropriate co-solvents can fully achieve dilution and dispersion effects.
(2) For printing equipment: Adding inappropriate solvents can cause increased equipment friction, accelerate equipment depreciation; at the same time, it may cause ink mesh clogging and frequent shutdowns, accelerate parts wear and reduce production efficiency.
(3) Relationship with printed ink film: Solvent selection must fully consider the gloss, flatness, retention, durability, extensibility, and adhesion of the printed ink film.
Precautions for Solvent Selection
(1) The commonly used solvents in screen printing ink are roughly divided into five categories: ketones, alcohols, benzene, esters, and alkanes. The main function of solvents is to dissolve resins and dilute ink. Various inks should carefully select appropriate solvents, such as in PVC systems, ketones can dissolve, benzene slightly swells, alcohols gel, and attention must be paid during selection.
(2) Dissolving power of co-solvents: The function of co-solvents is similar to that of main solvents, so the correct co-solvents must be selected to avoid causing the ink to gel, lose flowability and viscosity.
(3) Original specification purity (percentage) of solvents: The original specifications and purity of solvents directly affect the degree of ink dissolution and dilution. If not original solvents, they may contain small amounts of water or impurities, which will greatly affect the quality of printed products, potentially causing the printed surface to lose gloss, poor adhesion, and mesh clogging.
(4) The evaporation rate of solvents directly affects the drying speed of ink. Due to the rapid development of printing technology and printing speed, appropriate solvents should be carefully selected, otherwise it will greatly affect printing operability, causing ink to dry too quickly and clog the mesh, or dry too slowly and easily re-adhere.
(5) Solvent dispersion of colorants: Solvent selection has a close relationship with the dispersion of pigments contained in ink. If the wrong solvent is used, it can also cause the pigments in the ink to agglomerate (re-coarsen) and affect color strength, reduce color concentration, and even make normal printing impossible.
Under normal circumstances, an appropriate amount of solvent can be added, and the evaporation rate of the solvent directly affects the drying speed of the ink. Adding solvent will thin the ink, causing insufficient coverage or unclear fonts. Generally, ink should not dry on the screen plate, and should begin surface drying about ten minutes after passing through the screen, which is the standard for screen printing ink. However, general screen printing ink does not have the problem of drying too quickly, and even in dry weather, there will be no obvious mesh clogging phenomenon. Once similar problems occur, the main reason is that the ink factory's formula has problems.
Let us now understand the close relationship between solvents and screen printing ink.
Analysis of the relationship between screen printing ink and solvents, the relationship between solvent volatility and screen printing.
Solvent Analysis in Screen Printing
Solvents are an indispensable material in screen printing and have a key impact on screen printing production and print quality. In screen printing, solvents are closely related to screen printing ink and must be given full attention. The following is a simple elaboration on this topic.
Functions of Solvents in Screen Printing
(1) Resin dissolution: Different resins require different solvents for dissolution (polar, non-polar).
(2) Flowability: Similar products produced by different manufacturers have different dissolving powers, which directly affect ink viscosity.
(3) Gloss: Similar or different solvents with different evaporation rates will cause fogging and whitening of the ink film when released in the printed ink film, thus affecting the gloss of the printed surface.
(4) Drying time: Due to differences in printing methods, printing environment, climatic conditions, and formulation requirements during printing operations, solvents with different boiling points are needed to provide appropriate drying time.
(5) Solvent retention: Some solvents with low affinity for resin help extend the open time of the printed ink film and reduce residual solvents.
Solvent Setting of Screen Printing Ink Properties
(1) Solvent: Solvents used to dissolve resins and stabilize viscosity in accordance with basic ink quality conditions during ink production.
(2) Co-solvent: Solvents with slightly weaker dissolving power used to assist in solving certain shortcomings in other conditions when the main solvent has excellent dissolving power but presents shortcomings in other aspects.
(3) Diluent: Solvents that do not have dissolving power for the ink's own resin, but when mixed with the main solvent, have dissolving functions to achieve the effect of reducing ink viscosity and diluting ink.
Analysis of the Relationship Between Screen Printing Ink and Solvents, the Relationship Between Solvent Dissolving Power and Screen Printing
(1) For the ink itself, good dissolving power makes the ink appearance have a uniform texture, gives the ink stable viscosity and flowability, is not easy to gel, and adding appropriate co-solvents can fully achieve dilution and dispersion effects.
(2) For printing equipment: Adding inappropriate solvents can cause increased equipment friction, accelerate equipment depreciation; at the same time, it may cause ink mesh clogging and frequent shutdowns, accelerate parts wear and reduce production efficiency.
(3) Relationship with printed ink film: Solvent selection must fully consider the gloss, flatness, retention, durability, extensibility, and adhesion of the printed ink film.
Precautions for Solvent Selection
(1) The commonly used solvents in screen printing ink are roughly divided into five categories: ketones, alcohols, benzene, esters, and alkanes. The main function of solvents is to dissolve resins and dilute ink. Various inks should carefully select appropriate solvents, such as in PVC systems, ketones can dissolve, benzene slightly swells, alcohols gel, and attention must be paid during selection.
(2) Dissolving power of co-solvents: The function of co-solvents is similar to that of main solvents, so the correct co-solvents must be selected to avoid causing the ink to gel, lose flowability and viscosity.
(3) Original specification purity (percentage) of solvents: The original specifications and purity of solvents directly affect the degree of ink dissolution and dilution. If not original solvents, they may contain small amounts of water or impurities, which will greatly affect the quality of printed products, potentially causing the printed surface to lose gloss, poor adhesion, and mesh clogging.
(4) The evaporation rate of solvents directly affects the drying speed of ink. Due to the rapid development of printing technology and printing speed, appropriate solvents should be carefully selected, otherwise it will greatly affect printing operability, causing ink to dry too quickly and clog the mesh, or dry too slowly and easily re-adhere.
(5) Solvent dispersion of colorants: Solvent selection has a close relationship with the dispersion of pigments contained in ink. If the wrong solvent is used, it can also cause the pigments in the ink to agglomerate (re-coarsen) and affect color strength, reduce color concentration, and even make normal printing impossible.