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簡(jiǎn)體中文|
English發(fā)布日期:2022-07-11 瀏覽:2008次 |
關(guān)鍵詞:顏料鑒別;古畫修復(fù);拉曼光譜。
摘要:意大利羅馬世界物質(zhì)文化遺產(chǎn)保護(hù)組織使用如海光電便攜式拉曼光譜儀785nm檢測(cè)Morte di Santa Orsola 。測(cè)得的拉曼圖譜與數(shù)據(jù)庫(kù)rruff及文獻(xiàn)對(duì)比,可鑒別破損及褪色部分的顏料,維持原畫作的藝術(shù)效果。
古畫是珍貴的文物,具備優(yōu)質(zhì)的藝術(shù)欣賞價(jià)值與科學(xué)研究?jī)r(jià)值。因環(huán)境因素、人為因素的影響,經(jīng)常會(huì)出現(xiàn)污損、蟲蛀及發(fā)霉等情況,必須對(duì)古畫進(jìn)行修復(fù)處理。古畫修復(fù)中會(huì)面臨不能取樣,或由于尺寸、脆性和安全性等問題無法移動(dòng)。如海光電和Youth in Conservation of Cultural Heritage - YOCOCU APS合作,選用便攜式拉曼光譜儀Oceanhood’s portable 785 nm Raman Spectrometer RK785-II instrument用于十八世紀(jì)下半葉Morte di Santa Orsola古畫修復(fù)研究。
顏料是古畫美感呈現(xiàn)的重要載體,在古畫修復(fù)中全色屬于主要環(huán)節(jié)之一,在破損或者褪色的部位填涂顏色相同的顏料,以維持原畫作的藝術(shù)效果。實(shí)驗(yàn)表明,基于多光譜技術(shù)對(duì)古畫進(jìn)行修復(fù),不僅可以在保證不修改古畫的本來風(fēng)貌的基礎(chǔ)上還原載體和各顏料的顏色,而且不依賴于人的主觀意向,因此這種方法更為精確。
拉曼光譜證實(shí)了通過XRF分析獲得的結(jié)果。藝術(shù)家調(diào)色板主要是由赭石組成的。使用朱砂作為紅色,是通過拉曼光譜中存在253、282和343 cm?1的特征峰驗(yàn)證的;通過224和404cm?1證實(shí)混合的有紅赭石。
Colour | Points of analysis | Elemental composition by XRF | Molecular identification by Raman spectroscopy | Identification by Reflectance spectroscopy |
Blue, sky | Mis. 1 | Pb (+++), W (++), Fe (++), Cu (+), S, Ca, Ar | Fluorescence | - |
Red, mantle of Saint Orsola | Mis. 2 | Pb (+++), Hg (+++), W (++), Fe (+), Cu (+), Ar, S, Ca/ Sb | Cinnabar and red earth | Cinnabar and white lead |
Pink, cheek of the cherub | Mis. 3 | - | cinnabar | Cinnabar and white lead |
Green, palm leaf | Mis. 4 | Pb (+++), Fe (++), W (+), Cu, Sb, S, Ar, Ba/Ti | Green earth | White lead, green earth or malachite |
Pink, cheek of the angel | Mis. 5 | Pb (+++), Hg (++), W (++), Fe(+), Cu (+), S, Ca, Ar | cinnabar | Cinnabar and white lead |
White, mantle of Saint Orsola | Mis. 6_1 | Pb (+++), W (++), Cu (+), Fe (+), S (+), Ca, Ar | fluorescence | White lead |
White, mantle retouch of Saint Orsola | Mis. 6_2 | Pb (+++), W (++), Cu (+), S (+), Ar, Ca, Fe | - | - |
Yellow, mantle detail | Mis. 7 | Pb (+++), Fe (++), W (++), Zn (+), Sb (+), Cu (+), Ba/Ti, S, Ar | Yellow ochre | White lead, yellow ochre or Naples yellow |
Green, mantle of handmaid | Mis. 8 | Pb (+++), Fe (+++), W (++), Cu, Sb, Ar, S, Ba/Ti | fluorescence | White lead, green earth or malachite |
Blue, handmaid’s ribbon | Mis. 9 | Pb (+++), Fe (++), W (++), Cu (+), Ca (+), S, Ar | fluorescence | - |
Blue, mantle of angel | Mis. 10_1 | Pb (+++), Fe (++), W (++), Cu (+), Ca (+), Ar, S | fluorescence | - |
Light blue, mantle of angel | Mis. 10_2 | Pb (+++), Fe (++), W (++), Cu (+), Ca (+), Ar, S | - | - |
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