护版液是印刷工业照像制版工艺中,为保护玻璃原版图案不受损坏而涂布的一种防护材料。多年来,采用的防护液以聚苯乙烯为溶质、以苯和乙醚为溶剂,不但成本高,而且毒性大。 天津市人民印刷厂工程师张春羽、化验员黄桂芳二同志,在厂党组织及工人同志的热情支持下,经过反复试验,终 Retaining solution is a kind of protective material which is applied in industrial photographic platemaking process to protect the original glass pattern from damage. Over the years, the protective solution used polystyrene as a solute, benzene and ether as a solvent, not only high cost, but also toxic. Zhang Chunyu, an engineer of Tianjin People’s Printing Factory, and two comrades of laboratory technician Huang Gui-fang, under the enthusiastic support of the factory party organizations and workers’ comrades, after repeated tests and finally