Effects of Different Pre-freezing Methods on the Drying Quality of Books Processed by Aquatic Deacidification
In this paper,vacuum freezing drying was selected as the research of whole books processed by deacidification.Liquid nitrogen pre-freezing and slow-rate pre-freezing were compared in terms of brightness,color,tensile strength,tearing strength,folding strength and sensory evaluation of books.The results showed that slow-rate freezing shortened drying time.Liquid nitrogen freezing was better than slow-rate freezing in terms of optical quality and appearance,while slow-rate freezing was better in terms of mechanical quality.Considering economical efficiency and long-term conservation of books,slow-rate pre-freezing is recommended.
国家科技期刊平台
NSTL
万方数据
维普
