TW Graphics UV Standard Colors – NXG-21 Opaque White Gallon | High-Opacity UV Screen Printing Ink for Signage & Plastics

Name: TW Graphics UV Standard Colors – NXG-21 Opaque White Gallon | High-Opacity UV Screen Printing Ink for Signage &amp; Plastics
SKU: TW NXG-21-01
Availability: InStock

TW Graphics

TW Graphics NXG-21 Opaque White is a high-opacity, UV-curable screen printing ink designed for strong white coverage on signage, plastics, vinyl, coated board, and corrugated plastic. This production-grade UV white ink delivers excellent hiding power, bright white color, and reliable adhesion across a wide range of commercial printing substrates.

Engineered for professional sign shops and production screen printers, NXG-21 provides smooth laydown, stable viscosity, and consistent UV curing performance for both manual and automated in-line press systems.

$191.66

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SKU: TW NXG-21-01 Category: UV Inks Tags: high opacity UV white ink, Nazdar UV white alternative, NXG-21 Opaque White, TW Graphics NXG UV ink, UV ink for plastics and vinyl, UV opaque white ink, UV screen printing ink for signage, UV white ink for Coroplast, UV white ink gallon, UV white screen printing ink

Description

What Is NXG-21 Opaque White Used For?

TW Graphics NXG-21 Opaque White is formulated for applications requiring solid white coverage and strong opacity, especially on darker or transparent substrates.

This UV opaque white ink is commonly used for:

White underbases for multi-color prints
Political yard signs
Real estate signs
Retail signage
POP displays
Industrial and safety graphics
Window decals and static cling
Menu boards and panel graphics

NXG-21 is ideal when you need bold, bright white coverage with excellent hiding power and clean edge definition.

Designed for Sign Shops & Production Screen Printers:

Part of the TW Graphics NXG UV ink system, NXG-21 is engineered for stable viscosity and smooth ink transfer throughout long production runs. It performs reliably on manual presses and high-speed automated UV lines.

This product is commonly used as a:

UV opaque white ink
High-opacity UV white screen printing ink
UV white ink for Coroplast signage
UV white ink for plastics and vinyl
Production UV white screen ink

Where It Performs Best:

NXG-21 Opaque White adheres to properly treated substrates including:

Treated polyethylene (PE)
High-density polyethylene (HDPE)
Polycarbonate (PC)
Polystyrene / Styrene
Pressure-sensitive vinyl
Static cling vinyl
Reinforced vinyl banners
Coated paper and board stocks
Corrugated plastic (Coroplast™)

For polyethylene substrates, surface tension should be 42–46 dynes/cm or higher. Always perform adhesion testing before full production runs.

How It Cures:

This is a true UV-curable ink. It does not air dry.

NXG-21 cures under focused medium-pressure mercury vapor UV lamps in the 250–360nm spectral range.

Typical UV energy requirements:

150–300 mJ/cm² at 365nm (depending on ink film thickness)

Always verify cure using cross-hatch adhesion testing after full cooldown.

Pantone Equivalent:

Pantone Equivalent – N/A (White)
Closest Visual Reference – Bright neutral white
Color Type – High-opacity white
Intended Use – Solid coverage and underbase applications

Why Screen Printers Choose NXG-21 Opaque White:

High opacity – Excellent hiding power on dark substrates
Bright white tone – Clean, vibrant coverage
Stable viscosity – Consistent performance in long production runs
Broad substrate compatibility – Vinyl, plastics, Coroplast, coated board
Fully compatible with NXG UV system – Interprintable with NXG colors

NXG-21 Opaque White is ideal for commercial sign shops requiring durable, high-coverage white graphics and strong underbase performance.

Nazdar® Cross-Reference – Comparable UV Opaque White:

Looking for a Nazdar UV white alternative?

TW Graphics NXG-21 Opaque White functions similarly to high-opacity UV white inks used in Nazdar UV ink systems. Both are UV-curable inks designed for strong coverage and production efficiency across signage and plastic substrates.

As with any ink substitution, adhesion and cure testing should be completed prior to full production runs.

Ordering & Shipping Information:

Drop Ship Item – This product drop ships directly from TW Graphics in Commerce, California
Processing Time – Please allow additional time for handling and shipment
Final Sale – Non-returnable and non-refundable
Orders Must Be Placed Online – Colors cannot be changed after ordering

Technical Specifications

TW Graphics NXG UV Standard Colors – Technical Specs & Usage Guide

Technical Specifications:

Ink Type: UV Curable Screen Printing Ink
Viscosity: Optimized for multi-color in-line presses
Curing Method: UV light exposure
Curing Energy Requirement: 150-300 mJ/cm²
Adhesion: Bonds to treated plastics, vinyl, and various rigid substrates
Durability: Up to 2 years light-fastness with automotive-grade pigments
Resistance: Water-resistant and highly durable for indoor & outdoor applications
Finish: Satin/Gloss (varies by substrate and curing conditions)
Printability: Low pile height rheology for smooth ink laydown
Thinner/Additives: NXG Series Reducer (use sparingly)

How to Use TW Graphics NXG UV Standard Colors

Step 1: Screen Preparation

Use a properly tensioned screen for optimal results.
Recommended mesh count: 230-355 tpi (90-140 tpcm), depending on image detail.
Coat the screen with a UV-compatible emulsion, ensuring full stencil adhesion.

Step 2: Ink Application

Stir the ink thoroughly before use.
Print using a 70-80 durometer squeegee with a sharp edge for crisp details.
Use a medium squeegee pressure for optimal ink deposition.

Step 3: Curing Process

Cure under UV light exposure at 150-300 mJ/cm² for full adhesion.
Ensure proper exposure time in the dryer to avoid under-curing.
Avoid excessive UV exposure, which can overcure and affect adhesion properties.

Step 4: Testing & Post-Curing Considerations

Always perform an adhesion test on a sample print to verify cure levels.
Allow the print to cool before stacking or packaging.
NXG inks are designed for optimal adhesion, but post-treatment options (such as flame or corona treatment) may be required for certain non-porous substrates.

Recommended Printing Substrates:

✅ Plastics & Synthetics: Treated Polyethylene, HDPE, Polycarbonate, Polystyrene (Styrene), Static Cling Vinyl
✅ Rigid Boards & Papers: Coated Board Stocks, Cardstock, Pressure-Sensitive Vinyl
✅ Banners & Signage: Reinforced Vinyl Banners, Coroplast™, Transit & Point-of-Purchase Displays

⚠ Important Notes:

This ink requires UV curing and will not air-dry.
Do not mix with solvent-based inks or non-UV-compatible additives.
Store in a cool, dry environment away from direct sunlight.

TW Graphics NXG UV Standard Colors deliver fast-curing, high-adhesion, and long-lasting performance, making them the perfect choice for screen printers working with plastic, vinyl, banners, and signage applications.

Technical Sheets / Safety Data Sheets / Documents

NXG UV Screen Printing Ink Technical Data Sheet

NXG UV Screen Printing Ink Safety Data Sheet

FREQUENTLY ASKED QUESTIONS

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