跨湖桥遗址考古木材的二次保护

Re-conservation of archaeological wood excavated from Kuahuqiao Sites

跨湖桥遗址考古木材出土后经过脱盐处理,然后采用聚乙二醇(PEG)进行定形加固。保护后的考古木材存在色泽变深的问题,需要对这些考古木材进行二次保护。在二次保护过程中,选用1,2-二甲基-3-羟基-4(1H)-吡啶酮复配溶液作为脱盐脱色络合溶液,以PEG为定形加固剂,采用真空冷冻方式进行脱水干燥。二次保护取得了良好的效果,考古木材尺寸和形状基本保持不变,色泽更为自然,木材纹理清晰可见。

Archaeological timbers were desalinated and then stabilized and consolidated with polyethylene glycol(PEG)after being excavated from Kuahuqiao Sites.However,due to darkening after conservation,the archaeological timbers needed to be re-conserved.In the process of re-conservation,a solution of 1,2-dimethyl-3-hydroxy-4(1H)-pyridone was selected for desalting and decolorizing,PEG was used as a stabilizing and consolidating agent,and the vacuum freezing method was used for dehydration and drying.The re-conservation has achieved good results.The dimension and shape of the archaeological wood remain unchanged,the color is more natural,and the wood texture is clear and visible.