The Manufacturing Technology The important representatives of the manufacturing technology of seal paste in Shanghai are mainly Lu'an Seal Paste and Qianquan Seal Paste. The founder of Lu'an Seal Paste is Zhang Lu'an, and the founder of Qianquan Seal Paste is Wu Yin (also called Shi Qian). They has great influence on Japan, South Korea and Southeast Asia, and were welcomed by calligraphers and painters.

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