Champion Inks® OPTI-920 Slow Thinner – Precision Ink Control for Extended Open Time | 40000 Series
Keep screens open. Keep details sharp.
Champion Inks® OPTI-920 Slow Thinner is a high-performance solvent additive engineered to extend ink open time, improve flow, and enhance adhesion on flexible vinyl, rigid PVC, pressure-sensitive decals, and coated polyester (Mylar®). Purpose-built for 40000 Series vinyl inks, OPTI-920 prevents premature on-screen drying in hot or humid shops for consistent, professional results.
Fully compliant with California Proposition 65 and RoHS, it delivers longer working time, cleaner edges, and reliable performance on demanding substrates.
Key Features
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Extends Open Time – Prevents on-screen drying for stable halftones and fine detail.
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Smoother Ink Flow – Optimizes printability on vinyl, PVC, and coated polyester.
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Improved Adhesion & Flexibility – Promotes durable bonding on challenging materials.
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Tuned for 40000 Series – Optimized for Champion Inks® vinyl systems.
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Prop 65 & RoHS Compliant – Meets strict safety and environmental standards.
Recommended Substrates
- Flexible Vinyl Substrates
- Rigid PVC
- Pressure-Sensitive Decals
- Coated Polyester (Mylar®)
Product Compatibility
Designed for use with 40000 Series Screen Inks, ensuring longer screen open time, improved flow, and consistent print quality on vinyl-based applications.
Pre-Test Recommended: Always perform substrate testing to confirm adhesion and drying performance before full-scale production.
Screen Printing Guidelines
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Coverage: ~1,000 sq. ft. per gallon (250-mesh screen)
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Mesh Compatibility: 230–280 (92T–112T/cm European)
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Stencil Type: Optima EM-500, SBQ, or solvent-resistant emulsions
Drying Instructions
| Method |
Time & Temperature |
| Air Dry |
20–30 minutes (solvent evaporation) |
| Jet Dry |
40–60 seconds @ 150°F–180°F (66°C–82°C) |
Ink Modification & Additive Guide
| Modifier |
Purpose |
Recommended Use |
| OPTI-920 Slow Thinner |
Extend open time & prevent premature drying |
5–10% by weight |
| T-182 or T-975 |
Reduce viscosity & improve flow |
5–10% by weight |
| T-922 or T-934B Retarder |
Control drying in hot/humid conditions |
3–5% by weight |
| FA-011 Flow Agent |
Refine flow & leveling |
0.5–1% by weight |
| 40928 Match Base |
Extend color / reduce pigmentation |
As needed |
| 40PC850 Halftone Base |
Enhance fine-detail printing |
As needed |
Clean-Up Recommendations
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Primary Solvent Options: T-902, T-911, or T-925 Wash-Up
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Eco Alternatives: SC-500 Bio Wash-Up or SC-510 Instant Bio Wash-Up
- Keeps screens, squeegees, and presses clean for optimal workflow.
Available Packaging
- 1-Quart (0.945 L)
- 1-Gallon (3.78 L)
Safety & Handling
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Refer to MSDS: Review all safety instructions prior to use.
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Protective Gear: Use gloves, goggles, and proper ventilation during application.
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Storage: Keep sealed in a cool, dry, and ventilated area away from heat & sunlight.
Why Choose Champion Inks® OPTI-920 Slow Thinner?
Champion Inks® OPTI-920 delivers longer screen time, smoother flow, and stronger adhesion on vinyl and PVC—exactly what you need for crisp detail and reliable production.
Champion Inks® — precision control for flawless prints.
