What is a densitometer, colorimeter, hardness tester?
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What is a densitometer? What is the use of a densitometer?
Densitometers are commonly used original measuring instruments in printing houses. It is an optoelectronic measuring instrument that measures the gray value of black and white originals and measures continuous or dot values. The densitometer is divided into a transmissive densitometer and a reflective densitometer. Transmissive densitometers are suitable for measuring transparent originals, and reflective densitometers are suitable for measuring solid originals. The measurement range of the densitometer is 0-2.5. The higher the number, the higher the blackness. The basic principle of measurement is to measure the degree of blackening, that is, blackness, after exposure and development of the photosensitive material. At the time of plate making, the silver bromide on the photosensitive material is subjected to light irradiation, and is reduced to metal silver after development to form a certain opacity. Blackness is high, density is high; blackness is small and density is low. A gauge with a filter can also measure the color density of a color original. The measurement principle is similar to the above basic principle.
What is a colorimeter and what is its purpose?
The colorimeter is also known as a colorimeter. It is an instrument that measures the color characteristics of a material. The main purpose of the colorimeter is to measure and analyze the color, hue and color value of the measured material. If the colorimeter is connected to the computer, the color analysis and processing capabilities can be improved, and the user can find and retrieve various data from the color storage library of the microcomputer as needed.
What is a hardness tester and what is its use?
The hardness tester is an instrument for measuring the hardness of an object, and can be classified into a simple hardness tester and a complex hardness tester according to the degree of complexity. Hardness gauges are widely used in the rubber industry. In the screen printing process, the hardness tester is mainly used to detect the hardness of the scraper material.