What color inkpad is used for the signature seal of the works written on Lanting Preface Batik Stationery?

Red. Seal is an important part of China traditional culture, which has a long history and rich cultural connotation. In calligraphy and painting, seal is one of the most common forms of inscription. Red inkpad is used to seal works to increase their artistic value and ornamental value. Therefore, the works written on the batik stationery of Lanting Preface are engraved with red inkpad.