How to evaluate the penetration depth and durability of stone protective agents?
Publish Time: 2025-02-12
Stone protective agents play a vital role in protecting stone from stains, moisture and pollutants. Among them, penetration depth and durability are two key indicators to measure the performance of stone protective agents. This article will introduce in detail how to evaluate these two important characteristics of stone protective agents.
The penetration depth is an indicator of whether the stone protective agent can effectively enter the interior of the stone and form a protective layer. In order to evaluate the penetration depth, a laboratory test method is usually used. The tester will evenly apply two coats of protective agent on the surface of the stone and wait for it to dry completely. Subsequently, the stone is broken and the cross section is immersed in water. At this time, by observing the cross section of the stone, it can be clearly seen that the area where the surface has not changed color is the penetration area of the protective agent. By measuring the depth of this area, the penetration depth of the protective agent can be obtained. It is worth noting that a high-quality protective agent should have a deeper penetration ability to ensure that there is still enough protective layer inside even after the stone surface is worn.
Persistence reflects the ability of the stone protective agent to maintain its protective effect under long-term use and environmental changes. Evaluating durability usually involves tests that simulate environmental aging and actual use conditions. A common test method is to place a stone sample coated with a protective agent in a simulated environment and conduct accelerated aging tests such as high temperature, low temperature, and humidity. By regularly testing the permeability and stain resistance of the protective agent, its performance changes over time can be evaluated. In addition, the durability evaluation in practical applications also needs to consider factors such as the use environment of the stone, the frequency of cleaning, and the re-coating cycle of the protective agent.
When evaluating the penetration depth and durability of stone protective agents, the following points should also be noted: First, the test method should be standardized to ensure the comparability of the results; second, the characteristics of the stone itself, such as porosity and hardness, should be considered during the evaluation process, which may affect the performance of the protective agent; finally, the evaluation in practical applications should be combined with long-term observation and regular testing to fully reflect the actual effect of the protective agent.
In summary, the penetration depth and durability evaluation of stone protective agents are important links to ensure their performance and quality. Through standardized test methods and a comprehensive evaluation process, the performance characteristics of the protective agent can be accurately understood, providing strong support for the long-term protection of stone.
