Color analysis of Shirakawa-ishi used as landscaping material and similar granites
Color analysis of Shirakawa-ishi used as landscaping material and similar granites
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园林绿化材料白川石及类似花岗岩的颜色分析
DOI：
10.5632/jila.81.467
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
S. Shibata
中科院分区：
文献类型：
--
作者：
Pingxing Zhang;K. Fukamachi;Hiromasa Amasaki;S. Shibata
白川石是产自京都的著名白色花岗岩，用于园艺石材。它的碎片被称为白川须奈，由于其美丽的颜色，已被广泛用于京都的寺庙花园作为传统的景观碎石。然而，自从白川石的采石被禁止以来，白川石的景观一直在改变或消失。本研究旨在了解白川石及类似花岗岩的颜色特征，并探讨白川石的合适替代品。我们从3个采石场收集了白川石，以及4个不同来源的类似花岗岩。利用扫描仪、AutoCAD和Adobe Photoshop对每个样品中3种主要矿物（白色长石、灰色石英和黑色云母）的颜色进行了分析。“白色：灰色：白川石的“黑色”约为6.2：3：0.8，而白黑对比强烈，这导致柔和的白色，但清晰的颜色。与白石相比，稻田石（日本）要轻得多，并显示出更大的黑白对比度，这是太白色的景观砾石。SobuG 603（中国）的云母颜色不清楚，而LeBlanc（法国）的云母颜色更深，含有更多的石英。Kitagi-ishi（日本）的整体颜色略深，但最接近白川石。它的碎片被认为是白川须奈的适当替代品。
Shirakawa-ishi is a famous white granite produced from Kyoto and used for gardening stonework. Its debris is called Shirakawa-suna and has been widely used in temple gardens of Kyoto as a traditional landscaping gravel due to its beautiful color. However, ever since the quarrying of Shirakawa-ishi was banned, landscapes made of Shirakawa-suna have been changing or lost. This study aimed to find out the color characteristics of Shirakawa-ishi and similar granites, and to discuss on appropriate substitutes for Shirakawa-suna. We collected Shirakawa-ishi from 3 quarries, and 4 similar granites of different origin. We analyzed the color of 3 main minerals (white feldspar, gray quartz, and black mica) in each sample by scanner, AutoCAD and Adobe Photoshop. The ratio of “white: gray: black” of Shirakawa-ishi was around 6.2:3:0.8, while the white-black contrast was strong, which lead to a soft white, but clear color. Compared to Shirakawa-ishi, Inada-ishi (Japan) was much lighter and showed greater black-white contrast, which was too white for landscaping gravel. The color of mica in SobuG603 (China) was unclear, while LeBlanc (France) was much darker and contained more quartz. Kitagi-ishi (Japan) was slightly darker in overall color, but closest to Shirakawa-ishi. Its debris was considered to be an appropriate substitute of Shirakawa-suna.