文章信息/Info

Title:

Study on the Measurement of Reversible Rate for Cultural Relics Preservation Materials

作者:

張秉堅; 張棟梁; 鐵景滬

( 浙江大學 文物保護材料實驗室,浙江 杭州 310027 )

Author(s):

ZHANG Bingjian; ZHANG Dongliang;  TIE Jinghu

（Laboratory of Cultural Relics Conservation Materials, Zhejiang University, Hangzhou 310027, China）

關鍵詞:

文化遺產; 保護材料; 可逆率

DOI:

10.7502/j.issn.1674-3962.2012.11.05

摘要:

在文物保護研究領域，保護材料的“可逆性”是經常爭議的問題之一：什么樣的材料是可逆性材料？能否定量地表達可逆性？可逆性材料滲入磚、石、陶等多孔性材質中還可取出來嗎？可逆性材料老化以后的可逆率會如何變化等等。為了探索這一類基礎理論問題，本實驗室提出運用“可逆率”來定量地表征材料應用過程的可逆性，可逆率可以通過清除實驗來測量。通過測定B72、氟橡膠、純丙乳液、環氧樹脂在釉面瓷片、光面大理石、山西砂巖、凝灰巖和四川沙巖表面的取出率，計算出了它們的可逆率。實驗表明許多保護材料都有一定的可逆性，其可逆率的大小與被保護基底材料的孔隙率（吸水率）呈反比，也與清除劑的種類和清除工藝有關，同時保護材料的紫外光老化過程也會明顯影響保護材料的可逆率。文物保護材料可逆率的測量將會是研究其功能和機理的重要方法。��

Abstract:

The reversibility of the preservation materials is often the controversy focus in the field of cultural heritage conservation: what kinds of materials are reversible materials? How to quantitatively express the reversible? Are reversible materials also desirable when penetrated into the microporous of brick, stone, clay，and other porous materials? How to change reversible rate after aging？In order to explore these basic theoretical problems，this work proposes that we can use the “reversible rate” to quantitatively character the reversibility of the preservation materials in the application process and the reversible rate can be measured through the clearance experiment. The reversible rate is experimentally measured by the Paraloid B72, fluorine rubber, acrylic emulsion and epoxy resin on the surface of glazed tiles, glossy marble, Sichuan sandstone, tuff and Shanxi sandstone. The experimental results show that all of these materials has a certain degree of �﹔eversibility��. The removal rate of the protective materials is inversely proportional with the porosity of the basal substrate, and relates with the removing technology and scavenger species. The ultraviolet aging process is also significantly affecting the removal rate. The measurement technology of the reversible rate may be an important method to study the function and mechanism of cultural relic protection materials.