繪畫與書法是中華文化的精髓，然而以有機材質為主的中國書畫卻相當脆弱，易受材質本身的性質、裝裱 材料或技術、外在環境(如溫度、相對濕度、光線、污染物、有害生物等)或人為因素等影響，而決定其存世 的壽命。幸而中國書畫亦可經裱褙、修護的方式延長書畫存世年限。在古書畫的修護過程中老舊材料的來 源非常困難，若能以人工劣化處理的方式獲得古書畫修護用材，有助於保存古書畫。本研究分析書畫用材- 絹以不同的人工劣化條件：鈷60γ射線、電子線、紫外線及臭氧四種方式處理後，絹的物理與化學性質的 變化，並藉由書畫修護專家的手感分析，評估人工劣化絹在修護上的實用性。

Paintings and calligraphy are some of the most important cultural properties in Chinese culture. Being made of organic materials, characteristically silk, they are easily deteriorated by the, treatment even before they are painted/ written on. Also the environment factors, for example, temperature, relative humidity, light, air pollutants, pests, or handling etc., will affect their preservation. In Chinese culture, paintings/calligraphy can be preserved by traditional mounting techniques. However, ancient materials, such as ancient silk or paper, are difficult to obtain now. The artifi cial aging method can help to produce the substitute materials for conservation. In this study, silk is artifi cially degraded by four methods: irradiation by gamma rays, electron beam or ultra violet light; and by ozone treatment. The physical and chemical properties of the treated silk are analyzed. They are also tested by the conservator for use in the conservation of paintings/calligraphy.