The sound of hard cash

时间:2019-03-03 02:03:13166网络整理admin

By Barry Fox UK security printer De La Rue of Basingstoke, Hampshire, has invented a banknote that helps blind people recognise which notes they are handling (GB 2400074). Its idea is to emboss a pattern of troughs and ridged lines, like miniature furrows in a field, at both ends of a banknote. When the note is folded in half,