The advent of the tablet press1
Tablet presses appeared earlier in Europe and the United States, with a history of nearly a hundred years. In China, in 1949, the Tianxiang Huaji Iron Factory in Shanghai imitated the British 33 punching tablet machine; in 1951, it was transformed into a domestic 18 punching tablet machine based on the American 16 punching machine, which is the earliest pharmaceutical machinery made in China. ; In 1957, designed and manufactured the ZP25-4 tablet press; in 1960, successfully designed and manufactured the 60-30 tablet press, which has the function of automatic rotation and tablet pressing, and the pressed varieties include pills, sugar tablets, and calcium tablets , coffee tablets, etc. In the same year, ZP33 and ZP19 tablet presses were also designed and manufactured. Shanghai Pharmaceutical Machinery started in the 1970s
In clean area management and quality control, laminar flow interference testing has received much attention, and whether it is only applicable to Class A laminar flow remains to be considered.