TECHNOLOGIES

Three cyanide-free electroforming processes

Covering the industrial needs of gold, platinum and silver jewelry manufacturing — and extending into new-energy electroplating.

CORE PROCESSES

Gold · Platinum · Silver

5D Hard Gold
Au

5D Hard Gold

99.9% pure gold, 120HV+ hardness, cyanide-free, high fineness, simple wastewater.

  • 99.9% gold purity
  • 120HV+ hardness
  • Cyanide-free
5D Platinum
Pt

5D Platinum

Cracked platinum electroforming — 99.9%+ purity, cyanide-free, industrial-scale.

  • 99.9%+ Pt content
  • Industrial ready
  • Cyanide-free
5D Hard Silver
Ag

5D Hard Silver

Cyanide-free 5D hard silver process — safer, eco-friendly silver jewelry making.

  • 5D hard silver
  • Cyanide-free
  • Eco-safe
PROCESS LIBRARY

Eight cyanide-free processes

Cyanide-Free 14K & 18K Gold

Cyanide-Free 14K & 18K Gold

Cyanide-free 14K/18K electroforming produces Au-Cu or Au-Cu-In coatings above 100 µm thick at 58.5% (14K) and 75.0% (18K) purity, with stable, controllable K values.

Features
  • Mature; no KCN / NaCN
  • Stable 58.5% / 75.0% K value
  • Cyanide-free & eco-friendly
  • Uses Sn-Bi alloy blanks
  • Scales to any volume
Materials & equipment
  • Make-up solution
  • Brightener
  • Cyanide-free complexing salt
  • pH adjustment agent
  • Gold replenishing agent + training
  • Cyanide-free 14K & 18K electroforming machine
Cyanide-Free 21K & 22K Gold

Cyanide-Free 21K & 22K Gold

Cyanide-free 21K/22K electroforming produces Au-Cu or Au-Cu-In coatings above 100 µm thick at 87.5% (21K) and 91.6% (22K) purity, with stable, controllable K values.

Features
  • Mature; no KCN / NaCN
  • Stable 87.5% / 91.6% K value
  • Cyanide-free & eco-friendly
  • Uses Sn-Bi alloy blanks
  • Scales to any volume
Materials & equipment
  • Make-up solution
  • Brightener
  • Cyanide-free complexing salt
  • pH adjustment agent
  • Gold replenishing agent + training
  • Cyanide-free 21K & 22K electroforming machine
Cyanide-Free 5D Hard Gold

Cyanide-Free 5D Hard Gold

5D hard gold is a popular 99.9% pure-gold product in the jewelry industry. Traditional methods use large amounts of potassium cyanide; our cyanide-free 5D hard-gold process is a truly cyanide-free, eco-friendly process.

Features
  • Mature, stable, industrial-scale
  • Over 99.9% gold content
  • Hardness above 120 HV
  • Cyanide-free & eco-friendly
  • Simple wastewater treatment
Materials & equipment
  • Make-up solution
  • Brightener
  • Conductive salt
  • Gold replenishing agent + gold solution training
  • 5D hard-gold electroforming machine
Cyanide-Free 5D Hard Silver

Cyanide-Free 5D Hard Silver

A 5D silver product made by electroforming. With the same weight it reaches roughly 4× the volume of conventional silver, while solving silver softness and reaching 3× the hardness.

Features
  • Mature, stable, industrial-scale
  • Over 99.9% silver content
  • Hardness above 130 HV
  • Free of arsenic / lead / cadmium
  • Cyanide-free & simple wastewater
Materials & equipment
  • Make-up solution
  • Brightener
  • Conductive salt
  • Silver nitrate production training
  • Cyanide-free 5D hard-silver electroforming machine
5D Platinum Electroforming

5D Platinum Electroforming

Platinum is dense, silver-white and chemically stable, yet extremely hard to process. We overcame the long-standing challenge of 5D-hard-gold-style platinum electroforming and opened a new direction for platinum jewelry.

Features
  • Mature, stable, industrial-scale
  • Over 99.9% platinum content
  • Cyanide-free & eco-friendly
  • No highly toxic cyanide
Materials & equipment
  • Make-up solution
  • Brightener
  • Conductive salt
  • Platinum salt + platinum-salt preparation training
  • Platinum electroforming machine
Velvet Gold Electroforming

Velvet Gold Electroforming

Pure-gold decorative electroforming produces a beautiful velvet-like surface at 99.99% gold purity, designed for gold ornaments and art pieces.

Features
  • Mature; no KCN / NaCN
  • Gold purity 99.99%
  • Cyanide-free & eco-friendly
  • Uses wax-model blanks
  • Scales to any volume
Materials & equipment
  • Make-up solution
  • Brightener
  • Cyanide-free complexing salt
  • pH adjustment agent
  • Gold replenishing agent + training
  • Velvet-gold electroforming machine
Black Ruthenium Electroplating

Black Ruthenium Electroplating

Black ruthenium electroplating yields a deep, bright black finish with excellent color stability, widely used for black-tone jewelry.

Features
  • Mature, stable black tone
  • Wear-resistant, anti-tarnish
  • Cyanide-free, non-hazardous
  • Scales to any volume
Materials & equipment
  • Black ruthenium solution
  • Blackening agent
  • Conductive salt
  • Ruthenium replenishing agent + training
  • Black electroplating machine
Blue Rhodium Electroplating

Blue Rhodium Electroplating

Blue rhodium electroplating yields a bright light-blue finish with excellent color stability, widely used for blue-tone jewelry.

Features
  • Mature, stable blue tone
  • Wear-resistant, anti-tarnish
  • Cyanide-free, non-hazardous
  • Scales to any volume
Materials & equipment
  • Blue rhodium solution
  • Blue coloring agent
  • Conductive salt
  • Rhodium solution + training
  • Blue-rhodium electroplating machine

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