自从1840年5月6日英国发行一便士黑色邮票以来,已经过去160多年了。从一开始的普通邮票、纪念邮票到特种邮票,以及各种首日封、集邮卡等,林林总总,不胜枚举。 以前,用来印刷邮票的纸张是不怎么讲究的,但是在邮票流通过程中出现了一些问题,如经常有人不小心把邮票撕破、偶尔沾上水邮票就不好 More than 160 years have passed since the British issued a penny stamp on May 6, 1840. From the beginning of the ordinary stamps, commemorative stamps to special stamps, as well as a variety of first day cover, philately cards, there are numerous, too numerous to mention. In the past, the paper used for printing stamps was not very particular, but some problems appeared during the circulation of the stamps. For example, some people often accidentally torn the stamps and occasionally stained the water stamps