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Determination of tea polyphenols in milk tea based on spectrophotometer

In this study, the characteristics of colorimetric change in turbid solution can be determined by spectrophotometer. The content of tea polyphenols in milk tea without protein precipitation is determined by using ferrous tartrate solution as the chromogenic agent at a certain temperature. The influence of dilution ratio of milk tea, the amount of chromogenic agent, the chromogenic time and the chromogenic temperature on the determination result is explored, and the analytical method for determining the content of tea polyphenols in milk tea and other tea drinks by spectrophotometer is established. The results showed that the best test results were obtained […]

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Application of color measurement in wood science

Color is the basic attribute of wood. The color of wood and its products after dyeing or painting is more complex and changeable. Color measurement is very important in wood science research. The development and classification of color measurement methods are summarized, and the principles and characteristics of photoelectric integration, spectrophotometry and digital color measurement are summarized; On this basis, the application status of these three kinds of analyzers in wood science is expounded; Finally, the three types of colorimeters are compared and analyzed from four evaluation indexes of portability, speed, price and accuracy by using radar chart method, and […]

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Color difference control of automobile body and exterior trim

This paper mainly introduces the causes of color difference between car body and exterior trim, color difference measuring instruments and standards, visual matching and judgment of color difference, and the control methods of color difference between car body and exterior trim in the production process. Introduction With the continuous development of China’s automobile industry, consumers’ requirements for the appearance quality of automobiles are getting higher and higher, and the color consistency of automobile body and exterior parts is getting more and more attention and importance from consumers. At the same time, modern car body painting also shows the development direction […]

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The color of clothes is measured by spectrophotometer

Some people like blue, some people like red, everyone has different feelings about color, and there will be differences in the degree of love. In order to meet the various choices of consumers, clothing is usually made into different color styles, if the clothing has a color difference, consumers are certainly very difficult to accept, want to solve the problem of clothing color matching, we need to use the power of professional spectrophotometer! BENCH-TOP SPECTROPHOTOMETER CS-826 Why do we need to do color matching? Summer is coming, fairies, who still do not prepare a few good-looking dresses. But the yellowish […]

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What are the advantages of benchtop spectrophotometer

We live in a colorful world, although the color is a human visual effect of light, subjective factors, but the substance is objective physical characteristics of color. In order to solve the error of the naked eye on the color judgment, we have to use professional color detection instruments to calibrate the color, so what are the advantages of desktop spectrophotometer in color calibration? BENCH-TOP SPECTROPHOTOMETER CS-828 What are the classifications of color testing instruments? There are many kinds of testing equipment in the field of color management, but according to the way of detection to distinguish, there are two […]

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What is the unit of measurement result of colorimeter

How to see the measurement result of colorimeter? What is the unit? Many users in the use of colorimeter, do not know the above measurement results of each unit and the specific meaning of the representation, this article will provide a brief introduction to the basic knowledge of colorimeter. COLOR METER MAX What is the unit of color difference? Colorimeter is widely used in plastic, printing and dyeing industries in the field of color management, it is mainly based on the CIE color space Lab, Lch principle to detect the degree of color difference between the sample and the item […]

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What is a haze meter

What is a haze meter? A haze meter, also known as a haze tester, is used to determine the optical properties of transparent and translucent parallel planar materials and plastic films. A haze meter is an optical instrument; it is not a measuring weather device. What people call haze, is also called turbidity. Transparent materials are produced in such a way that a cloudy or hazy appearance occurs inside or on the surface of the material due to light scattering. Haze can be expressed as a percentage of the ratio of the scattered light flux to the light flux through […]

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What is a glossmeter

What is a glossmeter? Gloss meter is an instrument used to determine the surface gloss of ceramics, paints, inks, plastics, marble, aluminum, hardware and other materials. High precision gloss meter is divided into three types according to the angle: high gloss, medium gloss and low gloss.   Principle of glossmeter The light source G emits a beam of light through the lens L1 to reach the measured surface P, the measured surface P reflects the light to the lens L2, the lens L2 converges the beam to the photocell located at the light bar B. The photocell carries out photoelectric […]

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How is chromatic aberration in photography formed

What is chromatic aberration? Chromatic Aberration, also known as color aberration, is a common optical problem, due to different wavelengths of light so that the lens can not gather all wavelengths of color to the same focal plane, or when the wavelengths of color gathered to a different focal plane position and the formation of chromatic aberration. The wavelength of visible light for the average person is between 400nm (violet) and 700nm (red). The refractive index of a material (optical glass) varies with the wavelength of the passing light wave, and is called “dispersion”. The famous “trigonometry” experiment proves the […]

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What is a spectrophotometer

What is a spectrophotometer? A spectrophotometer is a measurement product that brings a high-performance, easy-to-use colorimeter to the market in a lightweight and compact form. Portable spectrophotometer is a measurement product that brings excellent performance and easy-to-use colorimeter to the market in a lightweight and compact way. It can be used for color measurement in automotive, new materials, new energy, plastic, leather, hardware, textile, food, pharmaceutical R&D, aviation and other industries. Features of spectrophotometer Can be measured in any position. Can simulate a variety of light sources. Can measure the “reflectance curve” of each color point (10nm or 20nm wavelength […]

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