Japanese irogane alloys and patination – a study of production and application

O'DUBHGHAILL, Coilin and JONES, Alan Hywel (2009). Japanese irogane alloys and patination – a study of production and application. In: BELL, Eddie, (ed.) Santa Fe Symposium on Jewelry Manufacturing Technology 2009: proceedings of the twenty-third Santa Fe Symposium in Albuquerque, New Mexico. Albuquerque, N.M., Met-Chem Research, 289-324.

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Japanese metalworkers use a wide range of irogane alloys (shakudo, shibuichi), which are colored with a single patination solution (niiro). This approach allows different alloys to be combined in one piece and patinated, producing a multi-colored piece of metalwork.

At present the production of irogane alloys and their patination is an unreliable process. This study aims to develop reliable alloy production and a safe, easy-to use and repeatable patination process using standard ingredients available from chemical suppliers.

The study has examined the production of shakudo and shibuichi alloys, characterizing the alloys produced by casting into cloth molds in hot water, into steel molds, and produced using continuous casting. The influence of traditional polishing methods was assessed using surface texture (Sa) measurements. Traditional rokusho, an ingredient of the niiro solution, was analyzed by XRF and XRD. Niiro patinated surfaces on a range of alloys were examined using XRD and L*a*b* color measurements.

Item Type: Book Section
Additional Information: Paper presented at the 23rd Santa Fe Symposium on Jewelry Manufacturing Technology, May 2009.
Research Institute, Centre or Group - Does NOT include content added after October 2018: Cultural Communication and Computing Research Institute > Art and Design Research Centre
Page Range: 289-324
Depositing User: Ann Betterton
Date Deposited: 10 Jun 2009
Last Modified: 18 Mar 2021 14:32
URI: https://shura.shu.ac.uk/id/eprint/971

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