Washability refers to the ability of the surface of the coating film not to fall off, crack or change color when it is initialized, scrubbed or scrubbed by cleaning agents such as water and detergent. This is one of the important indicators to measure the durability and service life of the coating. Coatings with good wash resistance can better protect the surface of the coated object from damage and influence from external factors and prolong the service life of the coated object.
The method of measuring the scrubbing resistance is generally to scrub or wipe the surface of the coating film with a certain intensity, number and time, and then observe the changes of the coating film to judge the quality of its scrubbing resistance. Commonly used scrubbing resistance test methods include Bloch (Block) test, Calabry test (Scrub Test), etc.
A common way to test scrubbing resistance is to use a washability Tester. This instrument typically simulates the scrubbing process in an actual use environment in order to assess the durability and durability of the coating material.
The test steps are usually as follows:
Prepare the test board: Apply the tested coating material evenly to the test board and let it dry completely.
Install the test board: Install the test board on the test bench of the scrubbing Tester and place the test bench in a tank with water.
Washing: By rotating the test bench, the test board is continuously initialized by water in the tank to simulate the washing process in actual use. Different conditions of use can be simulated by adjusting parameters such as test time, rotation speed, and water pressure.
Observation results: After a certain period of washing, remove the test board and observe whether the coating on its surface peels, cracks or falls off to evaluate the washing resistance of the coating.
It should be noted that different types of coating materials may require different test methods and parameters. At the same time, the scrubbing Tester also needs regular calibration and maintenance to ensure the accuracy and reliability of the test results.
