Tea has been popular as a natural beverage since ancient times, and with the development of tea consumption, the evaluation of tea quality has become more and more important. Color, aroma and taste are important indicators for evaluating the quality of tea. Especially the color is a necessary condition for judging the quality of the tea.
The visual method is an ancient traditional color measurement method. The specific method is that a standard chromaticity observer visually inspects the product under specific lighting conditions, and compares it with the CIE standard color chart to obtain the color parameters. Although human eyes have excellent visual functions, they cannot accurately identify subtle color differences, and color judgment errors often occur. The results measured by this method are of low accuracy and troublesome operation, and the results obtained by different people are often not the same.
In order to be able to detect the color of tea leaves accurately, quickly, and in batches, and then quickly classify them into different grades according to the color, more and more tea merchants use Spectrophotometer s for instrument detection.
The following describes the specific operation method:
1. First prepare the tea leaves and the powder test box (due to the rough surface of the tea leaves, this will cause measurement errors, so use the powder test box to press the tea surface as flat as possible);
2. Put the tea leaves into the powder test box and compact them to make the surface of the tea leaves smooth and opaque, otherwise the measurement results will be affected;
3. Carry out black and white calibration of the CS-600 portable Spectrophotometer ;
4. Then use the CS-600 portable Spectrophotometer to measure the tea leaves
At the end of the experiment, the following is the measurement result of the tea leaves. The CS-600 portable Spectrophotometer successfully graded the tea leaves according to the measured values.
Compared with the traditional visual method, the CS-600 portable Spectrophotometer method for measuring the surface color of tea leaves has the characteristics of strong objectivity, fast and easy operation, and high repeatability and accuracy. It can help tea producers to measure and grade tea more quickly and effectively.
