| Paper and silk are characterized by the highest light sensitivity level specified by the International Commission on Illumination,and they are extremely susceptible to yellowing,embrittlement,chalking and other damages caused by the influence of light.However,in museum exhibitions,traditional Chinese paintings on paper and silk are indispensable for viewing.Therefore,studying the law of light damage on paper and silk is of great significance to the appreciation and protection of traditional Chinese paintings on paper or silk.The current lighting quantity standards in the museum field have problems such as inconsistent standards,lack of accuracy,failure to comprehensively consider protection and viewing needs,and long-term renewal.Therefore,it is necessary and practical to accurately and scientifically calibrate traditional Chinese painting works on paper or silk.For the ancient paper and silk relics in the museum,this study selected D55 light source with nearly equal radiation effect in each spectral band as the experimental light source,and the original paper and silk in the 19 th century as samples.The irradiation experiments were carried out under five different illuminances of 0 lx,50 lx,100 lx,150 lx and 200 lx.At the end of each cycle,infrared spectrometer was used to test the internal conformation changes of samples,and the changes of oxidation index and crystallinity were used to characterize the damage of paper and silk respectively.The relationship between the degree of light damage and irradiation time and illumination was obtained,and the damage-irradiation time-illumination three-dimensional visualization surface model and mathematical model were established.By substituting the average annual exhibition time of these exhibits in the museum,the binary mathematical model of damage irradiation time illumination is transformed into a unitary function of damage illumination.According to the characteristics of the function curve of paper and silk,different ways are adopted to determine the lighting quantity index.Based on the widely used 50 lx illumination index,the maximum illumination under the same acceptable damage is obtained to balance the dual needs of viewing and protection in museum exhibition,and the corresponding exposure index is obtained by calculation.It is a general lighting quantity index with universality.At the same time,considering the special protection needs of precious cultural relics,the calculation method of targeted lighting quantity index in different lighting situations was given.Based on the results of this study and the previous accumulation of the research group,combined with the actual display of light source spectrum,the general lighting quantity index under the illumination of D55 light source is converted to obtain the targeted lighting quantity index under the illumination of the actual light source.Taking the commonly used LED light source as an example,the process was described in detail.In this study,modern paper and silk were selected as the experimental samples to carry out the irradiation experiment of D55 light source under different illuminations.Through processing and analyzing the data measured by infrared spectrometer,the recommended value of lighting quantity index of modern paper and silk art products was obtained.It provides theoretical support for the exhibition and protection of modern works with huge stock and considerable value.In this study,the light aging experiment method was used to study the traditional Chinese painting works on paper and silk.The recommended values of lighting quantity index of ancient paper and silk cultural relics and modern paper and silk works were given respectively.This study is of great significance for the exhibition and protection of traditional Chinese painting works,and provides a theoretical basis for the revision of relevant standards,It also provides a method reference for other types of art calibration. |
PDF Full Text Request