NTN - 2-Component Glass Backing Ink
1. Overview & Applications
The NTN Series is a specialized 2-component screen printing ink formulated explicitly as a protective backing layer (cover layer) for decorative appliance glass.
Performance Highlights:
- Anti-Yellowing: Demonstrates outstanding resistance to yellowing during high-temperature baking.
- High Surface Tension: Once fully cured, the ink layer achieves a surface tension of > 40 dyne, ensuring superior bonding strength with industrial mounting adhesives and double-sided tapes.
- Inter-Layer Compatibility: Exhibits exceptional inter-layer adhesion when printed over our NHB and NCD glass ink series.
2. Physical & Chemical Performance
Testing Conditions: 1st Layer: NHB 9002 Clear (baked 180°C/7 min) -> 2nd Layer: NHB 102 White (baked 180°C/7 min) -> 3rd Layer: NTN 002 Gray Backing (baked 180°C/12 min). Substrate: 5mm Glass. Mesh: 150.
| Gloss Finish | Matte |
|---|---|
| Environmental Compliance | Complies with EU RoHS directives. |
| Adhesion (Cross-Hatch Test) | 3M Tape Peel Test: 100% Retention (No peeling) |
| Boiling Water Resistance | Submersed in boiling water for 1 hour: No abnormalities |
| Cold Water Submersion | Soaked for 100 hours: No abnormalities |
| Acid & Alkali Resistance | Soaked in 5% H₂SO₄ and 5% NaOH for 24 hours respectively: No abnormalities |
| Detergent / Soap Resistance | Soaked in 10% soap water for 96 hours: No abnormalities |
| MEK (Solvent) Resistance | Cotton swab with MEK, 1000g load, 200 rubs: No abnormalities |
| Thermal Cycling | -20°C to +70°C for 10 cycles: No loss of adhesion |
| High-Temp Anti-Yellowing | White and Clear Varnish baked at 180°C for 30 minutes: No yellowing detected |
3. Standard Color Series
While typically used as a backing layer (Gray, White, or Black), the NTN series is available in a full spectrum of standard colors for specialized design requirements.
- Base Colors: 102 Extra White, 704 Insulating Black.
- Warm Tones: 201 Lemon Yellow, 202 Original Yellow, 203 Deep Yellow, 204 Orange, 301 Bright Red, 302 Deep Red, 303 Rose Red, 304 Peach, 307 Bright Peach.
- Cool Tones: 401 Purple, 502 Heliogen Blue, 504 Ultramarine Blue, 602 Extra Green.
*Additional custom and specialty colors are available upon request.
4. Mixing & Processing Instructions
Mixing Formula
| NTN Glass Ink | 100 Parts |
|---|---|
| B-11 Hardener | 10 Parts |
| JD-100 Slow-Dry Thinner | 15 - 25 Parts (Adjust to proper printing viscosity) |
Processing Guidelines & Pot Life
- Pot Life: Once the B-11 hardener is added, the ink viscosity will gradually increase until it gels. Pot life is 8 to 10 hours at 25°C. (This time decreases in hotter summer environments). For maximum stability, we recommend mixing only a 4-to-5-hour supply at a time.
- Printing Sequence: Applied as the final protective backing layer in the decorative glass printing sequence.
- Baking Conditions: Must be baked at 180°C for 12 to 15 minutes.
- Storage & Shelf Life: Store in a cool, dry place away from open flames. Shelf life is 12 months at standard room temperature.
Curing Verification Test
NTN ink must be thoroughly baked to achieve full cross-linking. Failure to fully cure will severely compromise performance. To verify full curing, perform the following test:
Take a cotton cloth soaked in MEK (Methyl Ethyl Ketone). Apply 2-3 kg of pressure and rub the ink surface back and forth at a speed of 1 cycle per second for 100 cycles. If the ink layer remains intact, it is fully cured. If the ink wipes off, the baking time or temperature must be increased.
Want to see commercial applications and packaging examples for this backing ink?
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