Reliable irogane alloys and niiro patination—further study of production and application to jewelry

JONES, Alan Hywel and O'DUBHGHAILL, Coilin (2010). Reliable irogane alloys and niiro patination—further study of production and application to jewelry. In: Santa Fe Symposium on Jewelry Manufacturing Technology 2010: proceedings of the twenty-fourth Santa Fe Symposium in Albuquerque, New Mexico. Albuquerque, N.M., Met-Chem Research, 253-286.

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Japanese metalworkers use a wide range of irogane alloys (shakudo, shibuichi), which are colored with a single patination solution (niiro eki). This approach allows different alloys to be combined in one piece and patinated, producing a multi-colored piece of metalwork. At present the niiro patination process is unreliable. In this study we develop a deeper understanding of the effect of patination solution ingredients on color. We have tested a synthetic niiro solution, comparing the color results with traditional niiro solution patination. Surface products have been analyzed to determine how they are influenced by both the niiro solution and cleaning procedures during patination. A large range of shibuichi and shakudo alloys have been produced to determine the full color pallette. This work also explores the use of alternative processes for the patination of irogane alloys, examining the effect of laser marking and anodizing on irogane alloys.

Item Type: Book Section
Research Institute, Centre or Group - Does NOT include content added after October 2018: Cultural Communication and Computing Research Institute > Art and Design Research Centre
Materials and Engineering Research Institute > Advanced Coatings and Composites Research Centre > Nanotechnology Centre for PVD Research
Page Range: 253-286
Depositing User: Coilin O'Dubhghaill
Date Deposited: 31 Jan 2012 16:05
Last Modified: 18 Mar 2021 05:03

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