In China in the 1980s, the color sorters introduced by domestic grain processing companies were all produced by advanced foreign countries, mainly Japan (Anzai and Toyo) and the United Kingdom (Sorters). These color sorters are still in use at present, and most of them have been replaced by subsequent new models. The main reason is that the color sorting technology at that time was not very advanced compared with the present, and the equipment introduced at that time They are all foreign molded products in the 1970s, and the models are relatively small. No matter in terms of control and operation, or performance and effects, they are not comparable to current color sorters.

The 1990s was a decade of rapid development in China's grain industry, which led to the rapid rise of the grain machinery industry.

In addition, foreign grain machine manufacturers have also entered China one after another, investing in building factories or opening offices. This also provides a great opportunity for domestic grain machine manufacturers to learn and develop, especially the color sorting machine, which has become the focus and focus. In the late 1990s, after the official institutions of several well-known foreign color sorter manufacturers stationed in China, comprehensive and clear guidance and publicity coupled with changes in rice consumption concepts, rice color sorting machines have gradually become more and more important in process design and practical application. An important process in Chinese rice processing.

During this period, the main color sorter manufacturers were still a few foreign manufacturers, plus a small number of domestic manufacturers, but there was a big gap between domestic and foreign equipment in terms of product quality. The main reason is that the foreign products at that time were synchronized products in the Chinese market and foreign markets, and they were all the most advanced technology at the time. For example, the second multiple selection greatly reduced the proportion of carry-out, and the double-sided lens and special wavelength light source were used to improve the recognition accuracy. The addition of black and white printing programs enriches the color selection functions. The domestic products are mainly semi-independent development and semi-learning and imitation. The understanding of color selection technology stays on the surface. It only uses ordinary light source, single-sided recognition, no multiple selection, simple functions, etc., so not only the product quality is not high, but also Performance is unstable.

Since 2000. China's color sorter industry has officially entered a period of rapid growth in rice processing. There are more and more domestic manufacturers, varieties and specifications are becoming more abundant, and the share of domestic equipment is gradually increasing. So far, more than 20 brands or manufacturers have appeared in the Chinese color sorting market, most of which are concentrated in Hefei, Anhui, such as GROTECH color sorters. With the increase of manufacturers, the specifications of color sorters are becoming more and more abundant, with more and more functions, from the earliest small channel models to large channel models, from the original single-selection function to simultaneous selection. From visible light recognition to infrared, ultraviolet light recognition and so on.

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