Matsui WS0482 Under Base Blocker 301 Gray Screen Printing Ink


Matsui Under Base Blocker 301 Gray is not only an excellent foundation for achieving vibrant prints on dark-colored fabrics but also a reliable solution to prevent dye migration on 100% polyester and fabrics prone to bleeding. By using this water-based ink as an under base blocker, you can effectively inhibit color bleeding, ensuring clean and sharp designs on challenging fabrics.

Moreover, Under Base Blocker 301 Gray serves as a versatile option for plastisol ink users. It can be used as an under base blocker for plastisol inks to be printed on top, enabling smooth and consistent layering for multi-color designs. This compatibility with plastisol inks extends the usability of the product, making it a valuable addition to any screen printer’s toolkit.

Experience enhanced print clarity, improved opacity, and effective dye migration prevention with Matsui Under Base Blocker 301 Gray. Elevate your printing projects and enjoy the freedom to create stunning designs on a wide range of fabrics, while ensuring the highest level of color fidelity and durability. Trust in this high-performance under base blocker to achieve exceptional results, whether you are working with water-based or plastisol inks.


SKU: MAT Under Base Gray Blocker Category: Tags: , ,


Key Features of Matsui Under Base Blocker 301 Gray:

  1. Dye Migration Prevention: Specially formulated to inhibit dye migration on 100% polyester and fabrics prone to bleeding, ensuring crisp and clean prints even on challenging materials.
  2. Versatile Application: Functions as an under base blocker for water-based and plastisol inks, offering seamless layering for multi-color designs with excellent compatibility.
  3. Enhanced Opacity: Provides improved coverage and opacity, creating a solid foundation for vibrant and vivid prints on dark-colored fabrics.
  4. Reliable Performance: Offers consistent and reliable results, making it a trusted choice for screen printers seeking high-quality and professional outcomes.
  5. Water-Based Formula: Environmentally friendly and PVC-free, complying with strict environmental regulations such as OEKO-TEX Standard 100, CPSIA, and HR4040.
  6. Easy to Use: User-friendly and easy to mix, ensuring a hassle-free printing process for both seasoned printers and beginners.
  7. Exceptional Print Clarity: Produces sharp and detailed designs, delivering outstanding print clarity and visual impact.

Elevate your printing projects with Matsui Under Base Blocker 301 Gray, a versatile and reliable solution designed to address common challenges in screen printing. With its outstanding dye migration prevention and compatibility with various inks, this product empowers you to achieve exceptional results on a wide range of fabrics, all while adhering to environmental standards for sustainable printing practices.

Technical Specifications

Technical Specifications: Matsui 301 Blocker Gray

Experience the convenience of purchasing 301 Gray Blocker right out of the bucket or unleash your creativity by making it yourself. Blend 90% Matsui Blocker Black LG with 10% Matsui Stretch White to achieve excellent under base results and prevent dye migration on various fabric types. Elevate your screen prints with this versatile and customizable combination.

Application: Print through fine screen mesh (110~305/inch recommended) when cured at 320°F (160°C), Matsui 301 Blocker Gray provides exceptional under base results, preventing dye migration on 100% polyester and fabrics prone to bleeding. It can also serve as an effective under base blocker for plastisol inks.

Mixing Ratio for 301 Gray Blocker: To create the 301 Gray Blocker, blend 90% Matsui Blocker Black LG with 10% Matsui Stretch White. This combination offers versatility and allows for customized printing solutions.

Special Recommendations: Matsui 301 Blocker Gray should be mixed in clean vessels using clean mixing blades and utensils. Any contamination from other ink sources or non-approved additives could affect its performance.

For enhanced printing capabilities and longevity of your prints, consider the following special recommendations:

  1. Dry Cleaning and Ironing: Prints made with Under Base Blocker Gray can be safely dry cleaned or ironed, preserving the quality and appearance of your designs.
  2. Retarder MG: Incorporate 1-5% of Retarder MG to extend the open time in the screen, allowing for smoother and more controlled printing.
  3. Fixer WF-N: Boost the wash fastness of your prints by adding 1-5% of Fixer WF-N to the ink, ensuring that your designs withstand repeated washings without compromising on vibrancy.
  4. Softener MG: Achieve better penetration into the garment by adding 1-4% of Softener MG to the ink, resulting in long-lasting and vivid prints with an exceptional soft hand feel.
  5. Thickener B: To adjust the ink’s consistency according to your printing needs, consider adding 0.25-1% of Thickener B to thicken the ink.
  6. RV Additive: Fine-tune the viscosity of Under Base Blocker Gray with 1-3% of RV Additive, enhancing control and printability during the printing process.

Additionally, you have the option to add 6%-9% Quick Additive, which contains Fixer WF-N, Retarder MG, and Softener MG, to further enhance performance and achieve desired printing effects.

Technical Data Sheet:

  • Wet Ink Tack: Low After
  • Flash Tack: Low
  • Printability: Excellent
  • Surface Appearance: Gray
  • Opacity/Viscosity: High/Medium
  • Bleed Resistance: None
  • Flash Temperature: 160°F (71°C) / decreases with deposit thickness
  • Cure Temperature: 320°F (160°C)
  • Squeegee Hardness: Medium
  • Squeegee Blade: Sharp
  • Squeegee Angle: 45 degrees to screen
  • Squeegee Speed:
  • Medium Emulsion: Direct or indirect
  • Mesh Count: 86-120/inch (43-120/cm)
  • Thinner: RV Additive
  • Thickener: Thickener B
  • Storage: 65°F to 95°F (18°C to 35°C). Avoid direct sunlight.
  • Cleanup: Water and mild soap or detergent
  • Color Range: Gray
  • Substrate Type: Polyester and fabrics prone to bleeding
  • Substrate Color(s): Light, Medium, and Dark Fabrics

Make the most of Matsui 301 Blocker Gray’s exceptional properties to enhance your screen printing results and achieve professional-quality prints.

Note: The printer must test the ink before a production run. River City Supply and affiliates are not responsible for dye migration or misuse of this product. It is imperative for the printer to test and ensure the ink is properly cured and opaque enough to prevent dye migration on particular fabrics.


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