Blocker – Avoid see-through prints and get a perfect result every time

At signproduction.co.uk, you’ll find high-quality Blocker material – specially designed to prevent color show-through when printing on garments and fabrics. With a blockout transfer film, you ensure that even dark or brightly colored textiles do not affect the colors in your design. This means your print remains vibrant, sharp, and true-to-color – no matter the fabric you work with.

Our Blocker for textile printing is the perfect choice when working with sportswear, workwear, or synthetic materials like polyester, where color migration can often be a challenge. The blocker layer creates a barrier between the textile and the print, preventing the colors from "bleeding” over time.

The blocker is easy to work with, suitable for both hobbyists and professionals. It can be used with HTV (heat transfer vinyl), printable films, and other textile printing methods. Combined with a heat press, it delivers results that are durable, flexible, and wash-resistant.

Order Blocker for textile printing from signproduction.co.uk and make your prints even more professional. We offer fast delivery, great prices, and materials that ensure perfect results every time.

    Textile Foil Hotmark SIR - Sublimation - (White) 710
    from £50
    £63 incl. vat

      Blocker – Prevent Color Migration and Achieve Sharp, Professional Textile Prints

      With Blocker material from signproduction.co.uk, you get the perfect solution to ensure your textile prints remain sharp – even on dark fabrics or polyester. Blocker acts as a protective barrier under your design, preventing colors from the fabric from bleeding through and compromising your print. This means your designs maintain clear lines, sharp contrasts, and vibrant colors, even after multiple washes.
      Blocker is primarily used with HTV (heat transfer vinyl), DTF, printable films, and textile prints on materials prone to color migration – for example, sportswear and workwear in polyester. By adding a blocker layer, you guarantee a professional result that lasts and looks consistent across all textile types.

      Benefits of Blocker from signproduction.co.uk

      • Prevents color migration: Protects against show-through and ensures a perfect finish.
      • Professional finish: Provides a smooth, even surface – ideal for names, logos, and graphics.
      • Suitable for polyester and sportswear: Perfect for textiles where sublimated fibers can bleed into the print.
      • Durable and washable: Withstands repeated washing without losing color or shape.
      • Easy to work with: Suitable for both hobbyists and professional print shops.

      How to Use Blocker

      Achieving a stable and professional result is simple:
      1. Cut the blocker material to the same shape as your final design.
      2. Apply the blocker with a heat press at the recommended temperature and time.
      3. Allow it to cool, then carefully remove the carrier sheet.
      4. Place your final design on top of the blocker and press again.
      5. Cool down and finish the print – your design is now protected against color migration.
      This method ensures a durable, clear, and professional finish every time.

      When to Use Blocker

      Blocker is especially useful for projects such as:
      • Sportswear with sublimated colors
      • Polyester jackets and workwear
      • Team jerseys and club apparel with names and numbers
      • Prints on dark textiles where high contrast is desired
      • DTF, HTV, and printable film applications that need an extra barrier
      If you’ve ever seen yellow turn green or white turn pink due to fabric color – Blocker is the solution.

      Choose Professional Quality Blocker

      At signproduction.co.uk, we provide high-quality materials that deliver consistent results. Our Blocker products are used by professional print shops, schools, sports clubs, and creative DIY designers who want to ensure maximum quality in their textile prints.

      Tips for the Best Results

      • Always test on the same type of fabric before full production.
      • Use a heat press for even heat distribution.
      • Ensure correct temperature and press time for both blocker and final design.
      • Wash garments inside out for longer-lasting results.

      Questions? We’re Here to Help

      If you’re unsure which type of Blocker to use or how to achieve the best results, our team is ready to advise you. Contact us at [email protected] or call +44 20 1234 5678 for free support.
      signproduction.co.uk – your supplier of high-quality materials for textile printing, signage, and creative projects.