Funding for this research was provided by:
Conservation Science and Technology Project of Zhejiang Provincial Administration of Cultural Heritage (2016).
Article History
Received: 9 June 2020
Accepted: 15 October 2020
First Online: 2 November 2020
Ethics approval and consent to participate
: This article does not contain any studies with human participants or animals performed by any of the authors.
: The consent for the publication of details and images in the manuscript are obtained from all participants.
: The authors declare that they have no competing interests.