Title:
NOBLE METAL-PLATED PERSONAL ORNAMENT
Document Type and Number:
Japanese Patent JPH07188945
Kind Code:
A
Abstract:
PURPOSE: To obtain a noble metal-plated personal ornament hardly causing metal allergy and to reduce the cost by thinning the noble metal plating.
CONSTITUTION: A copper-tin alloy plating 5 contg. 30-50% tin is formed as a substrate plating in ≥0.5μm thickness, and a palladium plating 3 not contg. nickel is formed as a white finish plating in 0.1-5μm thickness. A gold plating 6 not contg. nickel is formed, as required, on the palladium plating 3 in 0.1-5μm thickness.
Inventors:
SHOJI KAZUMASA
AKAZA TOSHIYUKI
AKAZA TOSHIYUKI
Application Number:
JP33542293A
Publication Date:
July 25, 1995
Filing Date:
December 28, 1993
Export Citation:
Assignee:
SEIKO INSTR INC
BIKUTORIA KK
BIKUTORIA KK
International Classes:
G04B37/22; C23C28/02; C25D3/48; C25D3/50; C25D3/56; C25D5/10; (IPC1-7): C23C28/02; C25D5/10; G04B37/22
Attorney, Agent or Firm:
Keinosuke Hayashi