Possible cause: insufficient yellow resistance grade of curing agent. Too much curing agent added!
Solutions: reduce the amount of curing agent, PU glue can choose yellow resistant curing agent, finished shoes with cleaning agent.
service hotline：
+086-20-37724020
Email：b@bali.cn
TEL：：020-37724020
Office address:Room 1001, No. 29, Ziwei Road, Huadu District, Guangzhou City, Guangdong Province, China
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