Inklove Screen Printing Optical Variable Ink Green to Blue
Brand Inklove
Product origin Guangzhou,China
Delivery time 7-15 working days
Supply capacity 50 ton per one month
Optically variable ink is also called optically color-changing ink and chameleon. The printed product color block presents a pair of colors, such as red-green, green-blue, gold-silver and so on. When looking directly or sideways under white light, as the viewing angle of the human eye changes, it presents two different colors. The light change characteristics are strong, the chromatic aberration changes greatly, and the characteristics are obvious.
It can be recognized without any equipment and the color angle effect is impossible. Reproduced with any high-definition scanner, color copier and other equipment, the printing features cannot be imitated with any other ink and printing method, and the anti-counterfeiting reliability is extremely strong, so it is designated by many countries in the world for the most stringent and difficult requirements. For the anti-counterfeiting of the largest currencies and securities, some well-known manufacturers have also used them for packaging anti-counterfeiting.
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Inklove Screen Printing Optical Variable Ink
1. Product Overview
Optical Variable Ink (OVI) is an advanced multi-layer thin-film interference pigment-based ink that exhibits dynamic color shifts when viewed from different angles (e.g., gold → green → blue). Widely used in banknotes, passports, and luxury packaging, it combines aesthetic appeal with high-level anti-counterfeiting functionality.
Optical Variable Ink Types:
Optically variable materials are widely used in the field of printing inks. According to their different uses, there are water-based inks, ink-based inks, plastic inks, and interference inks.
Features of anti-counterfeiting digital printed with optically variable ink:
*The color can be developed quickly in the sun, and the colorless state can be restored in a short time after shading (different colors have different colors, yellow can be completed in an instant after 2 to 3 minutes);
*Dispersion performance, can get uniform color printing;
*Good color rendering and friction fastness;
*This water-based ink is a liquid type ink;
* Good storage stability and easy operation.
2. Key Features
| Feature | Description |
|---|---|
| Angle-Dependent Color Shift | Dramatic color transition with viewing angle change (e.g., 15°: red → 45°: gold → 75°: green) |
| Optical Interference Principle | Nano-layer structure reflects specific wavelengths, producing pure, vibrant colors (non-pigment based) |
| Enhanced Under Light | Effect intensifies under natural or point light sources |
| High Adhesion | Compatible with glass, metal, plastics (PC/PET), paper, etc. – scratch-resistant |
| Anti-Counterfeiting Level | Internationally recognized Class B1 security (difficult to replicate, requires specialized equipment) |
3. Standard Color-Shift Options
Gold ↔ Green (Most common, e.g., currency)
Purple ↔ Blue (Luxury packaging)
Red ↔ Gold (Automotive logos, certificates)
Custom Color Systems (Pantone-matching available)
4. Applications
✅ Security & Anti-Counterfeiting: Banknotes (USD, EUR), passport visa pages, tax stamps.
✅ Premium Packaging: Cosmetic caps, tobacco/alcohol labels, electronics holographic tags.
✅ Industrial Design: Color-shifting logos on automotive parts, smart appliance surfaces.
✅ Cultural Products: Commemorative coins, trading cards with dynamic effects.
5. Printing Guidelines
Substrate Prep: Smooth surfaces (gloss/matte acceptable; affects color-shift intensity).
Screen Mesh: 250-350 stainless steel mesh recommended (400+ for fine details).
Ink Thickness: 8-12μm per layer (too thin reduces effect; too thick impacts adhesion).
Curing: UV (3 sec) or thermal (120°C × 30 min).
6. vs. Photochromic Inks
| Criteria | Optical Variable Ink (OVI) | Photochromic Ink |
|---|---|---|
| Trigger | Viewing angle change | UV/sunlight exposure |
| Color Shift | Angular color transition (e.g., gold→green) | Color appearance/disappearance (e.g., clear→purple) |
| Durability | Permanent (unless physically damaged) | Fades over time (2-3 years) |
| Security Level | Extreme (Class B1) | Medium-high (Class A2) |
7. Notes
⚠️ Design Limits: Minimum line width ≥0.2mm for continuous effect.
⚠️ Lighting: Best under white LED/natural light; avoid monochromatic sources.
⚠️ Batch Consistency: Control environment (23±2°C, RH50±5%).
Custom Solutions:
Tailored color-shift trajectories (e.g., specific angle sequences).
Hybrid anti-counterfeiting (e.g., combined with holographic foiling).
Technical datasheet (chromaticity coordinates, abrasion resistance data) available.
Request samples or anti-counterfeiting verification – physical color cards provided!
Contact Person:Caroline Lin
Tel:+86 18026391301
Email:fluorescentink@yyink.com
Website:www.printarea.cn
