Siser ColorPrint Ink Block PU LT is a specialist printable heat transfer vinyl designed to solve one of the biggest issues in garment printing: dye migration on sublimated and dyed polyester garments. When applying heat to sublimation-dyed textiles, the dyes within the fabric can rise to the surface and stain the transfer — causing colours to shift, darken or become discoloured over time. ColorPrint Ink Block PU LT is engineered to prevent this, allowing you to produce clean, vibrant prints on difficult garments with confidence.

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The key to its performance is the built-in block-out barrier layer within the film. This barrier blocks the dyes inside the garment, preventing them from migrating into the printed transfer during pressing or after repeated washes. It is a must-have printable HTV for businesses producing sportswear, teamwear, workwear and performance garments where sublimation-dyed polyester is common — especially on colours that are notorious for dye bleed, such as reds, dark blues and blacks.

Another major advantage is its low-temperature application. Many technical and sublimated garments are heat-sensitive, and pressing at standard temperatures can trigger dye migration or leave heat press marks. ColorPrint Ink Block PU LT is developed specifically for low-temperature application, reducing the risk of scorching, fabric distortion and unwanted dye activation. This makes it ideal for production environments that need consistent results across a variety of polyester garments.

Suitable for:

Sublimated garments
Dyed polyester garments
Sports kits, performance wear and technical textiles
Workwear and uniforms
Polyester blends where dye migration is a concern
Full-colour printed logos, graphics, badges and branding

ColorPrint Ink Block PU LT is compatible with Solvent, Eco-Solvent and Latex printers, making it an excellent choice for print shops using wide-format equipment and print-and-cut workflows. Designs can be printed, contour cut, weeded and heat applied like other printable HTV materials — but with the added protection of ink blocking technology.

If your business prints onto sportswear or polyester garments and you want to eliminate dye bleed, reduce reworks and maintain professional-looking transfers, Siser ColorPrint Ink Block PU LT is a reliable, production-ready printable heat transfer vinyl that protects your output and your reputation.

Cutting & Application

Composition: PU (Polyurethane)

Average Thickness: 80 µm
Blade Angle: 45°
Cut Pressure: 65g
Press Temperature: 155°C
Press Time: 15 seconds
Application Pressure: Medium pressure (3/4 bar)
Peel: Remove application tape while hot

Care & Washing

Initial Wait: 24 hours before first wash
Max Wash Temp: 60°C
Drying: Normal dryer setting
Dry Cleaning: Do not dry clean

Chemicals: Do not use bleach or aggressive chemical agents

Supportive Content

Video

Link to a Youtube video on how to use HTV

Siser ColorPrint Ink Block PU LT | Printable Heat Transfer Vinyl

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