The purpose of testing the stain resistance of architectural coatings is to ensure that the coating can maintain its performance and appearance when attacked by various pollutants, and will not cause fading, peeling, discoloration or damage due to the attack of pollutants. Architectural coatings are exposed to various pollutants, such as rain, dust, dirt, vehicle exhaust, etc., which may cause damage to the surface of the coating. By testing the pollution resistance of the coating, it is possible to evaluate the performance of the coating under the attack of different pollutants and determine whether it is suitable for use in such an environment. This can help ensure the appearance and performance of the building are preserved and extend the life of the coating.
The stain resistance of architectural coatings can be tested by the following methods:
Simulated weather test: Expose the paint sample to simulated weather environment, such as salt spray, sunlight, rain and high temperature, to simulate the actual environmental conditions. Over a certain period of time, the durability of the coating under the attack of pollutants is evaluated by observing the changes of the coating surface, such as color change, whitening, peeling or damage, etc.
Contaminant testing: Expose paint samples to different types of pollutants, such as paints, pigments, chemicals and other pollutants, to evaluate the stability of the coating under the attack of pollutants. Different types of pollutants can be used in the test process to simulate the actual use environment.
Washing test: Place the paint sample in an environment that simulates polluting substances, such as paints, pigments, chemicals and other polluting substances, and then conduct a washing test. Over a certain period of time, the durability of the coating during cleaning is evaluated by observing the changes on the coating surface, such as color change, whitening, peeling or damage, etc.
After these tests, color, appearance, adhesion and scratch resistance can be checked. The results of these tests can be used to determine the coating's stain resistance and suitability for specific polluted environments, thereby enabling the selection of better architectural coatings. Beichao reminds you: Different types of pollutants and environmental conditions have different effects on the coating, so it is necessary to choose a suitable test method according to the actual use environment and the type of pollutants. At the same time, the test time and the concentration of pollutants also need to be set according to the actual usage.