PCB Legend Ink
CAS Number: 25036-25-3
PCB legend ink is a screen-printable or inkjet-printable epoxy or acrylic ink used to print component reference designators, polarity marks, and logos on PCB surfaces. It must adhere strongly to solder mask, resist soldering temperatures, and remain legible after assembly processes. Available in white, yellow, and black formulations for both conventional and UV-cure printing methods.
Technical Specifications
| adhesion | Cross-cut 0 (ISO 2409) on solder mask |
| hardness | 4H pencil hardness |
| viscosity | 50–150 Pa·s |
| appearance | White, yellow, or black paste |
| resolution | ≤100 µm (inkjet grade) |
| solderHeatResistance | 288°C / 10s |
Applications
- Component reference designator printing on PCBs
- Polarity and orientation marking
- Logo and barcode printing on PCBs
- High-density PCB inkjet legend printing
- Flexible PCB legend marking
Key Features
- High contrast and legibility after assembly
- Strong adhesion to all common solder mask types
- UV-cure option for fast-curing inline processes
- Chemical resistant to fluxes and cleaning agents