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nature : a special paper on the Jenny : paper at its side do not see a transparent graphics; For a paper-Ying, to see clear patterns. For example, the 1990 version of 50 yuan unsold space on the left, there will be a steelworker graphics, which is watermarking. The watermark is the earliest the end of August or the beginning of the ninth century, the Tang Dynasty in China created by the artisans of recycled paper. When the curtain on the thread lock weave pattern. Department curtain patterns than face outstanding, as it should be relatively permits for the site of fibers intertwined into thin some, a higher degree of transparency. So we will have a watermark effect. The 13th century Italian craftsman additive-line weaving out letters, numbers or graphics, pages have a watermark on as a trademark. In modern paper machine using the modified roller (Watermark roll) to suppress wet pages created watermark. Roller can be modified as needed carving out various patterns or designs.
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