Title:
DECORATION MEMBER, CLOCK AND METHOD FOR MANUFACTURING DECORATION MEMBER
Document Type and Number:
Japanese Patent JP2023064859
Kind Code:
A
Abstract:
To provide a decoration member excellent in hardness and friction coefficient and having blue appearance color.SOLUTION: A decoration member is obtained by laminating a first adhesion layer, a second adhesion layer, a hard layer and the outermost layer in this order on a base material. The hard layer including diamond like carbon (hereafter, described as DLC) has a thickness of 0.4 μm or more and 1.2 μm; the outermost layer includes DLC; the hard layer formed on a laminate obtained by laminating the base material, the first adhesion layer and the second adhesion layer in this order has a L*value of 48 or more and 49 or less, a*value of 0 or more and 0.1 or less and b*value of 1.5 or more and 1.7 or less in a L*a*b*color system; and the outermost layer of the decoration member has a L*value of 30 or more and 31 or less, an a*value of 1.1 or more and 1.7 or less and a b*value of -11 or more and -9 or less in the L*a*b*color system.SELECTED DRAWING: Figure 1
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Inventors:
YOSHIDA RIKUTO
Application Number:
JP2021175276A
Publication Date:
May 12, 2023
Filing Date:
October 27, 2021
Export Citation:
Assignee:
CITIZEN WATCH CO LTD
International Classes:
C23C16/27; A44C1/00; A44C5/00; A44C25/00; C23C14/06; C23C16/50; C23C26/00; G04B45/00
Attorney, Agent or Firm:
Toranomon Intellectual Property Office
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