ISO 1004-1:2013规定了E-13B字符的形状、尺寸、磁信号水平和公差，其中包括10个数字和四个特殊符号，用磁性墨水打印，用于字符识别。它描述了各种已知类型的印刷缺陷和其他印刷注意事项，以及允许的公差。

ISO 1004-1:2013 specifies the shape, dimensions, magnetic signal level, and tolerances for the E-13B characters which include 10 numerals and four special symbols printed in magnetic ink and used for the purpose of character recognition. It describes the various known types of printing defects and other printing considerations, together with the tolerances permitted.