无尘丝印/电镀P014

Core Introduction to Glass Electroplating and Glass Silk-Screen Printing Processes

Glass electroplating and glass silk-screen printing are two core surface processes in customized precision glass processing, and serve as key procedures for functional upgrading and appearance beautification of glass components for electronic products. Glass electroplating is a precision metallization treatment process that forms a uniform and dense metal film on the glass surface via professional electroplating technology. It delivers multiple functions including conductivity, light shielding, light reflection and anti-electromagnetic interference, while enhancing the texture and wear resistance of glass, making it suitable for various high-end precision electronic glass parts.

Glass silk-screen printing is a dust-free printing process. Adopting a dust-free production environment and high-precision screen printing technology, it enables accurate printing of patterns, borders, texts and light-shielding layers on glass surfaces. It features clear patterns, neat edges, strong adhesion and fade-free performance for long-term use. Our factory adopts standardized combination of glass electroplating and silk-screen printing processes, matched with pre-processes such as precision engraving, etching, tempering and hot bending. All operations are implemented with refined management to avoid process defects including delamination, color difference and blurry patterns, fully complying with the high-quality processing standards of the electronics industry.

Key Specifications and Process Requirements of Glass Silk-Screen Printing

Silk-screen printing is a fundamental yet critical glass processing technology. It is also auxiliary to the electroplating process, where precise sizing and color overprinting rely on sophisticated craftsmanship and professional color tuning. For accurate color matching, customers are required to provide Pantone color numbers or physical samples to ensure pure and consistent color presentation.

Strict dust-free conditions are mandatory for all silk-screen printing operations to prevent dust and impurities from being sealed under the ink layer. Both QC inspectors and printing operators must avoid leaving fingerprints on the glass surface during production and inspection procedures. Our diversified silk-screen printing solutions cover conductive silk-screen printing, semi-transparent silk-screen printing and medical-grade silk-screen printing to meet differentiated application needs.

In terms of precision standards, the minimum line width and blank spacing of high-precision electronic glass silk-screen printing are strictly controlled at no less than 0.2mm to ensure fine and uniform printing effects.

Glass Electroplating Process

Glass is an insulator and cannot be directly electroplated through conventional methods. It requires professional conductive pretreatment before metal film deposition. The mainstream glass electroplating technologies are divided into three categories: vacuum electroplating (the most widely used), chemical plating and water electroplating, which are mainly applied for decoration, light reflection, conduction, heat insulation and anti-glare purposes.

Core Working Principle

With insulating properties, glass needs a conductive base layer (nickel, copper, silver, etc.) pre-deposited on its surface. Subsequent plating of metals and alloys such as gold, chromium, titanium, aluminum and indium tin oxide is implemented to achieve mirror, colored, conductive and hydrophobic surface effects.

Comparison of Mainstream Electroplating Processes

1. Vacuum Electroplating (Preferred and Most Common for Glass)

Implementation methods include magnetron sputtering, evaporation plating and ion plating. Applicable plating materials cover aluminum, titanium, chromium, silver, ITO and titanium nitride. This process boasts outstanding advantages such as strong adhesion, uniform coating, environmental friendliness and zero wastewater discharge, and can produce colored and transparent conductive films. It is widely used for mobile phone cover plates, automotive rearview mirrors, architectural coated glass, decorative glass, as well as AR and AF anti-fingerprint films.

2. Chemical Plating (Electroless Wet Plating)

The process flow includes glass surface sensitization and activation, followed by electroless plating of silver, copper or nickel to form a conductive base layer, which can be further thickened via secondary electroplating. It is commonly applied to mirrors, conductive glass, low-reflection glass and craft glass products.

3. Water Electroplating (Rarely Used Directly on Glass)

This process requires a pre-made chemical plating base layer before hanging plating or barrel plating. Due to large wastewater output and mediocre coating adhesion, it is rarely adopted for glass component processing.

Standard Wet Process Flow for Glass Electroplating

Pre-treatment: Degreasing → Water Cleaning → Surface Roughening (hydrofluoric acid micro-etching to enhance coating adhesion) → Neutralization

Sensitization: Soaking in stannous chloride solution to adsorb tin ions on the glass surface

Activation: Treatment with silver nitrate or palladium salt to form metal crystal nuclei

Chemical Plating: Silver, copper or nickel plating to form a stable conductive base layer

Electroplating Thickening: Secondary plating with chromium, gold, nickel, titanium and other metals

Sealing Protection: Coating with varnish or silicon dioxide sealing layer for anti-oxidation and wear resistance enhancement