Visual quantification of texture of Natsume in black Urushi (Asian Lacquer) and 3DCG reproduction

2022 Fiscal Year Final Research Report

• Project/Area Number: 19K02326
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 08030:Family and consumer sciences, and culture and living-related
• Research Institution: Kio University
• Principal Investigator: LEE WONJOUNG 畿央大学, 健康科学部, 准教授 (50388906)
• Co-Investigator(Kenkyū-buntansha): 望月 宏祐 長野大学, 企業情報学部, 准教授 (30760326)
• Project Period (FY): 2019-04-01 – 2023-03-31
• Keywords: 光反射特性 / 漆塗膜 / カシュー樹脂塗料 / ウレタン樹脂塗料 / ロイロ仕上げ / 質感 / 棗

Outline of Final Research Achievements

The correspondence between subjective expression (psychological quantity) and physical information (physical quantity) of the texture of black Roiro lacquer film was examined in relation to the sensitivity evaluation and light reflection characteristics of Roiro finish lacquer film, using Urushi (Asian lacquer), cashew resin paint, and polyurethane resin paint as the coating film and surface polishing used for finishing in the freshly painted finish and black Roiro finish. As a result, in the black Roiro (polished black color) finish, a coating film with low light scattering and a strong sense of blackness was evaluated as "blackness" and "glossiness." The black lacquer coating film in the Roiro finish is assumed to be an effect of the top-sliding process using Japanese Urushi in the lacquer coating process.

Free Research Field

色彩

Academic Significance and Societal Importance of the Research Achievements

黒呂色仕上げにおいては、光散乱が小さく黒みを強く感じる塗膜を「黒み感」「つや感」として評価される。これらは漆膜特有の表面特性として考えることより、国産生漆の上摺りの仕上げによるものと推測することができる。また、艶消し～半艶塗りたて仕上げの黒漆塗り膜は漆膜固有の特徴として捉えることができることとともに、呂色仕上げの黒漆塗り膜は、漆塗り工程における国産生漆による上摺り工程上の効果であることが考えられる。