In color measurement, a colorimeter is a commonly used measurement tool to measure and compare the differences between various colors. In order to ensure the accuracy and reliability of the measurement results, certain test judgment standards need to be followed. This article will introduce in detail the basis for the formulation of the colorimeter test judgment standard, the test method and the specific content of the judgment standard.
First, the basis for formulation.
The basis for the formulation of the colorimeter test judgment standard mainly includes the following aspects:
1.International standards and domestic standards: Internationally, ISO, CIE and other organizations have formulated relevant color measurement standards, and domestic standards have also been formulated according to national conditions. These standards are the basis for the development of colorimeter test judgment criteria.
2.Practical application requirements: Different industries have different requirements for color measurement, so it is necessary to formulate corresponding judgment standards according to actual application requirements. For example, in the textile, cosmetics, printing and other industries, the accuracy of color measurement is required, so the judgment standard should be improved accordingly.
3.Performance parameters of the instrument: The performance parameters of the colorimeter are also an important basis for formulating judgment standards. Different models and brands of colorimeters have different performance indicators such as measurement accuracy and stability, so it is necessary to formulate corresponding judgment standards according to the performance of the instrument.
2. Test method.
The test method of the colorimeter test judgment standard mainly includes the following steps:
1.Prepare the sample: A certain number of standard samples are selected to test the measurement accuracy and stability of the colorimeter. Samples should cover a wide range of colors and color aberrations and be representative.
2.Set the test conditions: According to the performance of the instrument and the actual application requirements, set the corresponding test conditions, such as measurement angle, light source, measurement times, etc.
3.Perform the test: Use a colorimeter to take multiple measurements of each sample and record the measurement data according to the set test conditions.
4.Analysis data: According to the measurement data, the color difference value between each sample is calculated, and the color difference distribution is analyzed.
5.Judging criteria: According to the test results and analysis data, the corresponding judgment criteria are formulated. The judging criteria should include the tolerance range, pass rate requirements, etc.
3. The specific content of the judgment criteria.
The specific content of the colorimeter test judgment standard mainly includes the following aspects:
1.Tolerance range: According to the actual application requirements and the performance of the instrument, the tolerance range between the colors is formulated. The tolerance range should take into account the influence of various factors, such as light source, measurement angle, etc. When setting tolerances, full reference should be made to relevant international and national standards.
2.Pass rate requirements: When judging the test results, you need to set the pass rate requirements. The pass rate requirements should be set according to the actual application needs and industry characteristics. Generally speaking, the higher the pass rate requirement, the higher the accuracy of color measurement.
3.Repeatability requirements: The repeatability requirements of a colorimeter refer to the consistency of the results of multiple measurements of the same color under the same conditions. Repeatability requirements are an important indicator to ensure the stability and reliability of measurement results. When setting the criteria, the repetitive requirements should be clearly defined.
4.Accuracy requirements: Accuracy requirements refer to the difference between the measurement results of the colorimeter and the actual color value. When developing the judgment criteria, the accuracy requirements should be clearly defined to ensure the reliability of the measurement results.
5.Operability requirements: When formulating judgment criteria, operability in actual operation should also be taken into account. The judging criteria should be actionable and easy to implement and enforce. At the same time, operators should be trained and assessed to ensure that they master the correct operation methods and judgment standards.
To sum up, the formulation of colorimeter test judgment standards needs to comprehensively consider international and domestic standards, practical application needs, instrument performance parameters and test methods. When formulating judgment standards, attention should be paid to ensuring the accuracy and reliability of measurement results, while taking into account the operability in actual operation.