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Heritage Preservation 

Deacidification system

Movable, efficient, automatic, single-leaf
  • RCICN accomplished deacidification of manuscripts of Qian Xuesen, Guo Yonghuai, etc.
  • Observations of paper aging and acidity
  • How to Stop Yellowing and Make Books Last
  • What Can We Do to Protect Paper From Acids
  • There are two principal chemical degradation pathways of paper
  • Acidic Paper and the More Rapid Degradation of Books
About us
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Reli Heritage Preservation Technologies Co.,Ltd.
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Reli Heritage Preservation (RCICN) the partner of PTLP in China, is the first professional company in China that has mastered the advanced technology of PTLP and has accumulated relative professionals and managements. PTLP is the leading company in the field of deacidification and reinforcement technology. Its advanced Bookkeeper technology won the majority of the global market with its excellent performance in safety, environmental protection and high quality.

By using Bookkeeper deacidification technology, Reli provide professional, safe and efficient services for deacidification and reinforcement of various kinds of paper documents, such as ancient books, calligraphy and paintings, data periodicals, drawing documents and map scriptures, etc., for all kinds of archives, libraries, colleges and universities, press and publication organizations, research institutes and design institutes in China, so as to save endangered documents with obvious and practical results and lay a foundation for the restoration and protection of documents and cultural relics. We have developed massive single-leaf deacidification system, continuous convoying deacidification system, and soaking deacidification system to deal with paper archives of various binding methods and sizes. The systems are    high efficient, low wastage, full-rounded and highly automatic.

The cooperation started in 2015, China Reli Heritage Preservation and PTLP hosted a paper deacidification technology seminar at National Library of China in Beijing.The advanced technology of Bookkeeper has attracted the attention of expert committee on the work of  Documentation protection plan in the republic of China. Since then, we have successfully carried out deacidification technical exchanges and cooperation with The State Archives Administration of the People's Republic of China and Beijing Municipal Archives Bureau.

In 2015, the Second Historical Archives of China had a trial deacidification treatment for 16,000 pages of archives adopting PTLP technology.Results were satisfying and won approval from the director of National Archives Administration.

A joint research team on deacidification was set up by the National Archives Administration, Reli and Beijing municipal archives administration in Jan.,2017. In July 2018, we successfully conducted a comprehensive investigation on the acidification of paper in archives of Beijing municipal archives bureau and its 16 branches. In 2019, we performed a verification test on sampled archives deacidificated with Bookkeeper Spray.

n July 2019, China Reli Heritage Preservation and Tibet Library conducted an acidification survey on buddhist scroll paper made by hand from roots of Stellera chamaejasme Linn. in Tashi Lhunpo Monastery in Shigatse, Tibet, and obtained acidification data of these paper in the past 600 years, 15th to 20th century in specific.

In September 2019, China Reli Heritage Preservation carried out an acidification research with  Chinese ancient book center of Sun Yat-sen University Libraries on the collection of rubbings in the center. The paper used in rubbings are called Xuan paper, a paper specially handmade from barks of Pteroceltis tatarinowii.,in a way passed down from more than one thousand years. We successfully acquired acidification condition data of these paper dating from Qing dynasty to 1980.

Picture of deacidification system