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来源:百度知道 编辑:UC知道 时间:2024/05/31 09:04:49
美元纸币是采用棉纤维和麻制成的。棉纤维长使纸张不易断裂,吸墨好、不易掉色。麻纤维结实坚韧,使纸张挺括,经久流通不起毛,对水、油及一些化学物质有一定的抵抗能力。美元纸张中没有添加增白剂,呈本白色,在紫光灯下不反光。自1880年起,美钞纸张内夹有红蓝纤维丝,这种纤维丝是在造纸时掺入纸浆的。因此,纤维丝有的夹在纸中,有的浮于表面,用针尖可以把纤维丝挑出来。1928年以前,红兰纤维丝分布在钞票的正中,由上至下狭长的一条。1928年及以后各版,纤维丝漫布全版。1990年起,美元纸张中(人像左侧)加入了一条被称为“迈拉”的聚酯类高分子物质制成的安全线,安全线上有美元符号及面额数字,迎光透视清晰可见。 美元正面油墨为黑色稍深,略带灰色,背面为绿色。1934年以后各版,油墨中添加了磁物质,具有磁性真美钞采用荧光油墨和磁性油墨等专用油墨特制,故美钞正面右侧的绿色徽记和绿色号码,在白纸上用力擦拭后,纸上能留下“绿痕”。1996年以后发行的部分美元会随光线角度不同而显示一会黑一会绿。美元的主要图案是雕刻凹版印刷,库印及连号等为凸印。1990年版以后,下面肖像窗周围加有缩微文字。

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U.S. dollar notes is made from cotton fiber and Ma's. Long cotton fibers to make paper difficult to break, ink, fade easily. Ma solid fiber tenacity, so that keeps the paper, circulation can not afford long hair, water, oil and some chemicals have a certain resistance. U.S. paper did not add a whitening agent, this was a white, non-reflective light in the morning. Since 1880, bills have red and blue paper folder with silk fibers, silk Fiber in this paper when The introduction of the pulp. As a result, some caught in the silk fiber paper, some floating on the surface, with silk fiber tip can be singled out. Before 1928, Hung Lan silk fibers in the middle of the notes, a top-down strip. In 1928 and subsequent versions, silk Fiber-man full-page cloth. Starting in 1990, the U.S. dollar in the paper (on the left side of face) to join a referred to as "Myra" polyester-type material made of polymer security thread, security l