Matsui Under Base Blocker 301-LG Black Water Base Screen Printing Ink


Under Base Blocker LG (Black Paste) is a base that is printed down first to block dye sublimation on polyester fabrics.



SKU: MAT Under Base Blocker Black LG Category:



  • Easy to mix and print
  • Prevents dye migration in to colors printed on top of Under Base Blocker
  • Great for printing on 100% Polyester, Performance Fabrics and Sublimation
  •  Excellent matte down characteristics to push the nap of the fabric down
  • Is “PVC Free” and environmentally safe

Technical Specifications


Print Under Base Blocker LG up to 120 mc in (47 mc cm) and cure at 320°F (160°C). A thicker stencil is preferred to achieve a heavier deposit of Under Base Blocker LG to provide better coverage of the fabric and prevent migration. Note: Due to variations in dyed polyesters, any application whether referenced or not in this technical data sheet should be pre-tested for suitability on the actual production fabric and/or consultation sought with Matsui International prior to printing.

Special Recommendations:

Under Base Blocker LG should be mixed in clean vessels using clean mixing blades and utensils. Any contamination from other ink sources or non-approved additives could make Under Base Blocker LG test positive for restricted PVC’s.

  • Use Retarder MG 1-5% to help with open time in the screen
  • Use Fixer WF-N 1-5% to help with wash fastness
  • Use Fixer L 1-3% to help with wash fastness(Low cure crosslinking additive)
  • Use Thickener B .25-1% to help thicken the ink
  • Use RV Additive 1-3% to reduce viscosity

Technical Data Sheet:

  • Wet Ink Tack | Low
  • After Flash Tack | Low
  • Printability | Excellent
  • Surface Appearance | Matte
  • Opacity/Viscosity | High/Medium
  • Bleed Resistance | Excellent
  • 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
  • Underlay | N/A
  • Emulsion | Direct or indirect
  • Mesh Count | 80-120 mc in (32-47 mc cm)
  • Thinner | RV Additive
  • Thickener | Thickener B
  • Storage | 65°F to 95°F (18°C to 35°C). Avoid direct sun.
  • Cleanup | Water and mild soap or detergent
  • Color Range | Black
  • Substrate Type | Cotton/Poly, Polyester
  • Substrate Color(s) | Light, Medium and Dark Fabrics


Product categories

You May Also Like

Additional Options