... Xinxiang Wende Xiangchuan Printing Ink Co ., Ltd is one of the large-scaled ,professional and hi-tech enterprises in China ... ink, plates, printing materials, etc; 2,The PH value of the buffer system is efficient, and the PH value can be controlled to ... effectively, therefore, to avoid voids caused by the indian version of oxidation, PH value of the instability and odor problems;4,No crystallization ...