How to determine the amount of oil repellent to be added?
Determining the amount of oil repellent to be added is a process that requires consideration
of multiple factors. Here are some recommended steps and methods:
1. Understand the basic properties of oil repellent
First, you need to understand the basic properties of the oil repellent used, including its chemical
composition, active ingredients, recommended range of use, etc. This information can usually be
found in the product manual or technical data of the oil repellent.
2. Consider the type of ink
Different types of inks may have different requirements and compatibility with oil repellents. For
example, water-based inks, solvent-based inks, and powder inks have different formulations and
performance characteristics, so the amount of oil repellent added also needs to be adjusted accordingly.
Generally speaking, the amount of water-based ink added is lower, solvent-based inks can be controlled
within a certain range, and the amount of powder ink added is between the two.
3. Consider the material of the substrate
The material of the substrate will also affect the amount of oil repellent added. Different materials have
different characteristics such as adsorption capacity and surface tension of inks, so the amount of oil
repellent added needs to be adjusted according to the specific material of the substrate. For example,
for materials that easily absorb ink, it may be necessary to reduce the amount of oil-repellent added to
avoid overdrying; while for materials that are not easy to absorb ink, it may be necessary to increase the
amount of oil-repellent added to improve the adhesion and oil-proof performance of the ink.
4. Conduct experiments to determine the optimal amount of addition
After determining the approximate addition range of the oil-repellent, it is necessary to conduct actual
printing tests to verify the effect. The amount of oil-repellent added can be gradually adjusted to observe
the changes in indicators such as the printing effect, drying speed, adhesion and oil-proof performance
of the ink. By comparing the printing effects under different addition amounts, the optimal amount of
oil-repellent added can be determined.
5. Refer to product instructions or technical data
In addition to the above steps, you can also refer to the recommended addition amount in the product
instructions or technical data of the oil-repellent. These recommended values are usually based on the
manufacturer's test and experimental data and have certain reference value. However, it should be noted
that due to differences in factors such as ink type, substrate material and printing conditions, the actual
amount of addition during use may need to be adjusted according to specific circumstances.
6. Pay attention to the control of the amount of addition
When adding oil-repellent, the amount of addition should be strictly controlled to avoid excessive or insufficient
addition. Excessive addition may lead to ink performance degradation or printing failure, while insufficient addition
may fail to achieve the expected oil-proof effect. Therefore, precise metering tools should be used during the addition
process, and the manufacturer's recommended addition amount should be followed.
In summary
Determining the amount of oil-proof agent to be added requires comprehensive consideration of multiple factors,
including the basic properties of the oil-proof agent, ink type, substrate material, and actual printing test results. Through
scientific testing and adjustment processes, the optimal amount of oil-proof agent can be determined to improve the printing
effect and oil-proof performance of the ink.
