As the name implies, the Colorimeter is to measure the color of the object. Through the Colorimeter, the chromaticity data and even the spectral curve of the measured object under different light sources and various conditions can be easily obtained, which is conducive to color management, control and research and development.
In general, Colorimeters are used to measure leather, ceramics, rubber, textiles, building materials, printed matter, automobiles, glass, skin, plastic, paint, video, pharmaceuticals, cosmetics, etc. Colorimeters can basically measure the above, but for some special measured objects, it is necessary to choose a suitable Colorimeter according to the different characteristics and attributes of different measured objects.
1. The measured object of powder
When measuring powdery objects with a Spectrophotometer , the measured value will vary depending on the powder density and surface condition. In order to avoid large deviations, some special methods can be used, for example, a certain amount of powder can be taken, put into a container with a certain shape and size and keep the surface properties unchanged.
If the measured object is large in size, a Spectrophotometer with a large measuring aperture can be used, so that the measured surface can be more even and the repeatability of the data can be guaranteed.
2. The measured object of translucent material
When measuring translucent objects, it is necessary to take into account that light may penetrate the measured object and the measurement may be affected by the material behind the measured object. In order to solve this problem, a desktop computer can be used for transmission measurement, and the light passing through the object can be analyzed to obtain data results.
3. Objects to be tested with patterns or textures
If a small aperture Spectrophotometer is used to measure objects containing patterns or textures, the measured value will vary with the measurement location. At this time, you should use the largest possible caliber or repeat the measurement several times at different positions, and then calculate the average value. Or you can use a 45/0 optical structure instrument, ring lighting, to reduce the impact of texture on the direction of reflected light, especially suitable for leather, car interiors, etc.
4. The measured object of metallic color
In order to achieve brilliant colors, many paints, especially automotive paints, use a method of mixing dyes with metal flakes, so that the colors seen by the human eye at different angles are different. Therefore, a multi-angle Spectrophotometer is used to measure It is necessary to measure the value and the actual effect.
5. The measured object with wet or uneven surface
It is not easy to measure the results accurately with conventional measuring instruments, and it is easy to pollute the inside of the instrument. An instrument equipped with a glass cover target mask should be used to easily measure surface wet substances or to better flatten uneven surfaces to make data more stable.
The above are the selection and measurement methods for several special objects to be measured when using a Colorimeter for measurement. The purpose of using a Colorimeter to measure color is to obtain more accurate data than the human eye, and to do better color control analysis. Therefore, when measuring, we should also pay attention to minimizing some additional factors that affect the measurement results, such as the above special object properties.
