What is the material of ancient tarpaulin?

The earliest oilcloth umbrellas in China were made of cotton cloth, and then a layer of cooked tung oil was brushed on the cotton cloth. The cooked tung oil can dry quickly and prevent rain. 【Material】: cotton cloth, cooked tung oil. [Oil-paper umbrella process]: 1. Brush tung oil on the cotton cloth, and the first pass of cooked tung oil completely penetrates into the cotton cloth, which plays a role in deep maintenance and strengthens the tension and toughness of the tissue paper. 2. Brush the cooked tung oil again. Since the cooked tung oil applied in the first pass has saturated the tissue paper, the cooked tung oil in the second pass will only stay on the surface. After drying, the conjunctiva will form a protective layer, and the oil and water will not mix. As soon as the water comes into contact with the protective layer formed by the cooked tung oil, it slides off immediately, and it can play a waterproof effect. [Oilcloth]: (yóubù) refers to a kind of cloth composed of oil and cloth, which is generally obtained by immersing the fabric in oil. The oil cloth in the factory mainly refers to the oil-impregnated cloth fabric, which is generally used for handling to prevent abrasion during handling, or for heavy-duty mechanical equipment, such as the buffer lubrication layer of mechanical components such as aircraft landing gear, and is generally discarded at one time. [Note]: No matter what kind of tarpaulin, it is easy to catch fire, and they are all dangerous items with high flammability, and they are all important hidden dangers for fire safety. Famous tarpaulin fire incidents include: New York Queens Bridge fire, Shanghai Luojing port cargo ship fire and so on.

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