3M™ Circuit Board Plating Tape 851ST is a green polyester-backed masking tape engineered specifically for printed circuit board gold-finger electroplating and solder-stripping baths. Its adhesive formulation creates an impervious seal that prevents aggressive chemical bath undercutting, peeling away cleanly without adhesive transfer.
Key Performance Highlights
- Conformable green polyester backing provides excellent chemical barrier against acidic plating baths
- Specially formulated adhesive prevents plating bath undercutting and edge leakage
- Removes cleanly from PCB traces without leaving adhesive ghosting or residue
- Translucent green color allows precise visual alignment over critical contact fingers
Recommended Industrial Applications
Printed circuit board (PCB) gold finger plating masking, chemical bath protection, powder coating
Authoritative Technical Specifications
| Backing Material | Translucent green polyester blend film |
|---|---|
| Adhesive System | Formulated silicone/rubber-blend masking adhesive |
| Total Thickness | 0.100 mm (4.0 mil) |
| Operating Temperature | Up to 130°C (266°F) masking bath temperatures |
| Visual Color / Appearance | Green (Translucent Polyester) |
| Dielectric / Flame Rating | Chemical plating barrier |
| Precision Converting | Precision Rotary Slitting, Die-Cutting, Custom Widths from 2mm to Log Width |
