Measuring the pH of a pigment becomes very important when it comes to the stability of the pigment, the performance of the coating and the control of the production process. The pH of the pigment can affect its dispersibility and tinting strength in the pigment dispersion, and it may also affect the viscosity, covering power and other properties of the paint. By measuring the pH of the pigment dispersion, the production process can be effectively controlled to ensure the quality and stability of the pigment.
Measuring the pH of a pigment is usually achieved by measuring the pH of the pigment dispersion. In general, the measurement method is as follows:
Prepare a certain amount of pigment dispersion, then use a pH meter or pH test paper to measure the pH of the liquid.
Be sure to pay attention to the treatment method of the sample before the test. If it needs to be diluted, add other reagents, etc., it needs to be processed according to the test requirements.
Make sure that the pH meter or test paper used is suitable for the pH range of the pigment dispersion, otherwise errors may occur.
When measuring the pH value, the pH meter or test paper should be immersed in the liquid first, and the result should be read after a few seconds. If you use test paper, you also need to compare it with the corresponding pH table according to the color of the test paper.
Beichao reminds you: Different pigments and pigment dispersions may have different requirements and methods when measuring pH, which needs to be selected and operated according to specific conditions.
