Evaluate the speed and efficiency of defoamers in eliminating bubbles. Examine the ability of defoamers to prevent the generation of new bubbles over a period of time. Test the compatibility of defoamers with the materials and additives used to ensure no side effects. Evaluate the stability of defoamers under different temperature, humidity,

and other conditions.

Observe with the naked eye whether there are defects such as bubbles and pores on the surface of the finished construction product. Measure the number, size, and distribution of bubbles using instruments such as microscopes and bubble meters. Conduct strength, density and other performance tests on the materials after using defoamers

to verify the defoaming effect.