玻璃底片的修護保存與數位化──以桃園市政府收藏古廟影像為例

Conservation, Preservation and Digitization of Glass Plate Negatives: Ancient Temples Images Collected by Taoyuan City Government as a Case Study

2021年桃園市政府文化局發現39件玻璃底片，狀況包含玻璃破損、銀粒子析出、影像被加工修整
等狀況。影像包含現今航空城計畫徵收區域內的百年前寺廟，例如大園區福海宮、大眾廟、貴文宮等。
其中應以景福宮最早於嘉慶十六年（1811年）興建完成，且最原始的原貌影像已多不可考，明膠乾版底片的紀實功能，以及年代特性及稀有性，恰好正是這些桃園廟宇文化資產最佳的佐證影像資料。
本文主要介紹這批玻璃底片保存現況與數位化過程中，進行「加固玻璃裂紋」及「移除銀粒子析
出」處理，以及依「國際色彩聯盟（International Color Consortium, ICC）」色彩特性定義「目標設備色
彩空間對於特性文件空間（Profile Connection Space, PCS）」色彩轉換進行數位化等，妥善保存玻璃底片的原始物質與數位影像資產。

In 2021, a collection of 39 glass plate negatives, discovered by the Taoyuan City Government’s Cultural Affairs Department, was severely damaged. The negatives had suffered from glass fractures, silver image deterioration, and post-production modifications. These images include century-old temples such as Fuhai Temple, Dazhong Temple, Guiwen Temple in Dayuan District, which are now slated for redevelopment as part of the Taoyuan Airport City project. Among them, Jingfu Temple was initially completed in the 16th year of Jiaqing era (1811). As the original appearance of the temple is no longer extant, the recording function, as well as the age and rarity of the gelatin dry plate negatives, serve as invaluable visual evidence of Taoyuan’s temple heritage.
This article primarily introduces the current preservation status and digitalization process of a collection of glass plate negatives. It also discusses the specific treatments undertaken, such as glass crack stabilization and silver halide removal. Moreover, the digitalization process adhered to the International Color Consortium (ICC)’s Profile Connection Space”(PCS) to ensure the proper preservation of both the physical artifacts and digital image assets of the glass plate negatives.