The historical origin of jelly glue
The history of jelly jelly was found in the pyramids built in Egypt around the 27th century BC. China's "Kao Gong Ji" in the year 500 BC had records such as "Lujiao Qingbai, Majiao Chibai, Niujiao Chichi, Rat Gel Black, Fish Gel Bait, Rhinoceros Yellow". It is illustrated that over 2000 years ago, China began to manufacture and apply jelly glue, which is mainly used for medicinal, ink and adhesive purposes. In the early 18th century, Europe began extracting gelatin from calf bone as an additive to food. In 1847, France first used gelatin for photographic paper production. In 1871, the United Kingdom officially developed a camera-specific gelatin.
The above is Zhongbang jelly glue, animal glue, gel glue for you to share!
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1. shutters blade: It is the main component of the blind, used to adjust the angle of sunlight and control the brightness of indoor light.
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