Viscosity cup is a common precision testing instrument in the coating chemical industry. Although the structure is very simple, the rigor of manufacturing and production is different. Even two products with the same specifications may be very different when measured. Therefore, the difference in the manufacturing workmanship of the Viscosity Cup has a relatively large impact on the measurement accuracy. However, in addition to the product quality problems of the Viscosity Cup itself, users often make mistakes on two points during the selection and use process!
First, choose the Viscosity Cup according to different standards
One of the conditions for the selection of Viscosity Cups is what standard the viscosity test is based on, which has a certain impact on the correctness of the viscosity test. Therefore, what the laboratory test standard requires is a Viscosity Cup that meets the national or international standard, and then choose it according to the standard, which can further ensure more accurate test results. Therefore, what standard Viscosity Cup is used for the first time, then the same sample for subsequent tests should be selected according to the standard Viscosity Cup, so as to ensure the consistency of test results and the continuity of comparison .
Second, the test results of different brands with the same cup number are different
From time to time, there are user feedbacks that the measurement of the Viscosity Cup is not accurate. But if you ask carefully, you used to use the No. 3 Viscosity Cup of brand A, but this time you choose the No. 3 Viscosity Cup of brand B. What's more, I used to use imported brand Viscosity Cups, but now I have replaced domestic brand Viscosity Cups.
To be honest, it is normal that the measurement is not the same. Different brands, the fineness of the workmanship, the material of the Viscosity measurement Cup, the accuracy of the aperture, etc. are more or less different. Even the same brand and the same batch may have a slight difference between the two cups, but this difference will not affect the test results. However, different brands of Viscosity Cups cannot be guaranteed at all. Therefore, if the user has high requirements for the accuracy of the measurement results, it is recommended to choose the Viscosity Cup of the same brand and model to be more guaranteed. The measurement results of Viscosity Cups of the same brand will not vary greatly, and are relatively consistent.
