The leveling property of the leveling agent is usually evaluated by comparing the skin surface after construction. But this method for the construction of relatively high requirements, there are many ways to measure the leveling agent of different film thickness, determine the leveling agent, in addition to these, should also take into account the compatibility of the system, the type of leveling agent, such as acrylate leveling agent applied in polyurethane system, acrylic system is more suitable, fluorocarbon modified leveling agent can be applied in fluorocarbon coatings, And silicone oil leveling agent is generally not suitable for medium primer.

Cost factors should also be considered comprehensively, such as different leveling agents to achieve the same or close leveling effect, the amount added is different, the cost is also different.

For leveling agent, different systems should choose different leveling agent. For a certain system, this leveling agent is very suitable, comprehensive performance is good, but for other systems, it is not necessarily suitable. Do not apply previous experience when designing the formula.

Choose a good leveling agent, should also take into account the paint flow hanging property, adhesion, surface gloss and surface hardness. Through comprehensive comparison, can select the leveling agent more suitable for the whole system.

The usual evaluation methods for leveling agents are: The use of flow hang instrument scraping, measuring the surface tension of leveling agent, the use of applicator coating method, the use of spray plate experiment method, through the orange peel instrument test, compare the compatibility of leveling agent, compare the foaming or foaming inhibition of leveling agent, compare the recoating property, the wettability of the substrate, shrinkage porosity resistance, on aluminum powder or extinction powder directional arrangement effect, etc., At the same time, it is also necessary to consider the influence of other auxiliaries, as well as the influence of different auxiliaries combined with the use of convecting agent.