古代壁画、彩绘显现剂应用机理和性能研究

Mechanism and performance of enhancement reagent applied to ancient Frescos and colored drawing

针对粘结硬质、钙化土锈的壁画和彩绘在保护修复中使用的去除剂和显现加固剂复合应用后对其性能进行了研究测试。从光学角度对明胶膜和加样后膜折射率进行测试,对土锈剩余层粒径与厚度进行测试,又从耐久性、柔韧性等方面对两种试剂复合用的模拟壁画进行了系统评价。结果表明:两种膜的折射率几乎相同,当土锈剩余层粒径在120μm以内,厚度在70μm内的土粒都可以通过显现加固剂进行显现,恢复其古朴原貌,且不触及颜料层。复合应用后对模拟样板老化后性能测试,数据显示各方面性能良好。

Rust- cleaning and enhancement reagents were applied to mural and colored drawings with calcified soils. After the treatment, the properties of the mixed film were tested. The optical properties of the gelatin film and enhancement reagent film were tested and their refractive indexes were recorded. The thickness and grain diameter of soil rust layer were measured. The durability and flexibility of the gelatin and the enhancement reagent films ap- plied to simulated mural paintings were also systematically compared. The results showed that the two films have a- bout the same refractive indexes and that when the soil rust layer is less than 120 μm thick, the soil particles on the top 70 μm can be recovered using the reinforcement reagent without interference with the paint layer. The reagent helps to restore mural painting＇s original appearance. Performance test of the painting was artificially aged. The data show good performance of the painting after aging.