Advanced Emulsion Tech Boosts Screen Printing Density

In the world of screen printing, achieving textured patterns or the desired "thick plate" effect (HD/Puff) can often be challenging, particularly when ink layers are too thin to produce the intended dimensional quality. For printers seeking impeccable detail and tactile depth, selecting the right emulsion frequently proves more critical than adjusting ink viscosity.

Ecotex® TEX Red HV (Red High-Viscosity Emulsion) addresses this challenge directly. This pre-sensitized, ready-to-use emulsion is specifically optimized for plastisol ink systems. Its defining characteristic is an exceptionally high viscosity, enabling effortless buildup of thick emulsion layers on screens. This creates deeper printing channels, facilitating high-definition, dimensional results.

Core Performance and Advantages

TEX Red HV transcends conventional emulsions, serving as a tool to elevate print quality:

• High-Viscosity Thick-Film Technology: Its unique rheological properties allow for thicker coating layers, making it ideal for specialized techniques like puff printing or high-density (HD) applications.
• Pre-Sensitized Formula: Eliminates the need for diazo additives or complex mixing procedures. The emulsion is ready for immediate use, streamlining workflow while minimizing quality inconsistencies from improper mixing.
• Exceptional Compatibility and Durability: Demonstrates excellent performance with plastisol, UV, and solvent-based inks. Its robust solvent resistance ensures stencil integrity during long print runs without requiring additional hardeners.
• High-Resolution Capability: Despite its viscosity, it delivers sharp edges and fine details across various mesh counts, accurately reproducing intricate designs.

Standardized Operating Procedure

To maximize performance, adhere to these operational guidelines:

1. Screen Preparation: Thoroughly degrease and dry the mesh. Pre-treatment with a quality degreaser (e.g., Hyper Haze) ensures optimal emulsion adhesion.
2. Coating Environment: Perform all coating under yellow or red safelights. Exposure to natural or white light risks premature curing.
3. Coating Technique: Apply with a sharp-edged scoop coater for uniform layers. Dry screens print-side down in a ventilated area (30°C–40°C, 30%–50% humidity) for at least 12 hours.
4. Exposure Parameters: Adjust times based on light source:
   • 80W LED (2–3" distance): 13–15 seconds
   • 500W halogen (14–15" distance): 7.5–8 minutes
   • 30W UV LED exposure unit (14–15" distance): 30 seconds
   Note: Calibrate non-standard equipment with an exposure calculator.
5. Reclamation: Post-printing, clean ink with dedicated washout solutions. For screen reuse, avoid dehazing. When reclaiming, limit dehazer contact to under 1 minute to prevent mesh clogging.

Expert Maintenance Recommendations

• Storage: Keep in cool, dark conditions. Refrigeration (not freezing) extends shelf life.
• Usage Protocol: Gently stir before use. Seal containers tightly and note opening dates to prevent oxidation.
• Troubleshooting: If print quality falters, verify screen dryness and recalibrate exposure. Maintain controlled lighting and workspace hygiene for consistency.