Siser Ink Block PS LT (EasyWeed) is a specialist cut-only heat transfer vinyl (HTV) designed for one of the most common challenges in modern garment decoration: dye migration on polyester fabrics. When printing or applying heat transfer vinyl to polyester garments — especially those coloured using sublimation inks — dyes can rise to the surface during heat pressing, causing colours to “bleed” into the vinyl and change the appearance of the finished design. Siser Ink Block PS LT is engineered to stop this, giving you clean, consistent results even on difficult textiles.

This material is a premium PU plotter-cut heat seal film with an adhesive polyester backing, making it easy to cut, weed and handle. It is specifically conceived for low-temperature transfers, which is crucial when working with sensitive polyester fabrics. Lower temperature application helps reduce the risk of dye activation, scorching, fabric distortion and unwanted colour shift — while still delivering a strong, durable bond.

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The key performance benefit is the film’s ink-blocking barrier layer. Through its special structure and processing, Ink Block PS LT creates a protective shield between the fabric dye and the vinyl. This barrier prevents the “migration” effect, ensuring the colour of your transfer remains stable and your finished design looks exactly as intended — even after repeated wear and washing.

Siser Ink Block PS LT is ideal for:

Polyester garments and sportswear
Workwear and performance clothing
Sublimation-dyed textiles
Difficult, high-migration fabrics (often red, navy, black and bright colours)
Logos, names, numbers and branding graphics

Because it’s part of the EasyWeed family, it retains the user-friendly benefits that professionals love: smooth cutting, simple weeding, and clean application, making it suitable for both production environments and smaller businesses that need professional reliability. It’s particularly valuable for printers and garment decorators who want to confidently offer polyester jobs without worrying about call-backs due to colour bleed, discolouration, or poor durability.

If your business works with sports kits, polyester uniforms, performance apparel or sublimation-dyed garments, Siser Ink Block PS LT is a must-have heat transfer vinyl that protects your work, preserves colour accuracy and helps you deliver consistently professional results.

Product Overview

Composition: Polyurethane (PU)
Thickness: 110 µm (average)
Features: Laser friendly and durable thicker profile.

Cutting Instructions

Blade: 45°
Cut Pressure: 60g

Application Settings

Temperature: 135°C
Time: 15 seconds
Pressure: Medium (3/4 bar)
Carrier Removal: Peel Hot or Cold

Care & Maintenance

Initial Wait: Wait 24 hours before first wash.
Max Temperature: 40°C
Tumble Dry: Do not tumble dry.
Dry Cleaning: Not suitable for dry cleaning.
Chemicals: Do not use bleach or aggressive chemical agents.

Siser Ink Block PS LT | Cut-Only Heat Transfer Vinyl

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