US 11,999,859 B1
Preparation method of copper green rust pigment that can replace Hayeob pigment in traditional Dancheong
Yeong Seok Kang, Daejeon (KR); Sun Myung Lee, Daejeon (KR); Ju Hyun Park, Daejeon (KR); and Seong Woo Mun, Daejeon (KR)
Assigned to National Research Institute of Cultural Heritage, Daejeon (KR)
Filed by National Research Institute of Cultural Heritage, Daejeon (KR)
Filed on Aug. 16, 2023, as Appl. No. 18/450,965.
Claims priority of application No. 10-2023-0050520 (KR), filed on Apr. 18, 2023.
Int. Cl. C09C 1/62 (2006.01); B22F 1/145 (2022.01); B22F 9/04 (2006.01); C09C 3/00 (2006.01); C09C 3/04 (2006.01); C09C 3/06 (2006.01); C22C 9/02 (2006.01); C22C 9/04 (2006.01)
CPC C09C 1/627 (2013.01) [B22F 1/145 (2022.01); B22F 9/04 (2013.01); C09C 1/622 (2013.01); C09C 3/006 (2013.01); C09C 3/041 (2013.01); C09C 3/06 (2013.01); C22C 9/02 (2013.01); C22C 9/04 (2013.01); B22F 2301/10 (2013.01); B22F 2998/10 (2013.01); B22F 2999/00 (2013.01); C01P 2002/72 (2013.01); C01P 2004/03 (2013.01); C01P 2006/63 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A preparation method of a copper green rust pigment that can replace traditional Hayeob pigments comprising the following steps:
a step of preparing a copper powder comprising at least one of copper and a copper alloy comprising copper and at least one of tin (Sn), zinc (Zn), and lead (Pb); and
a step of corroding the copper powder by mixing the copper powder with a corrosive agent containing sodium chloride and ammonium chloride, in which the corrosive agent includes 75 to 90 weight % of the sodium chloride and 10 to 25 weight % of the ammonium chloride based on the total weight.