As polyester and performance apparel continue dominating the apparel decoration industry, choosing the correct plastisol ink system has become more important than ever. Many screen printers quickly discover that not all low cure plastisol inks perform the same — especially when printing on 100% polyester garments, tri-blends, and athletic wear.
One of the most common questions printers ask is:
Why do LC/LB plastisol inks cost more than standard LC inks?
The answer comes down to chemistry, dye migration resistance, garment compatibility, and long-term print stability.
At KOLORMATRIX, we regularly help printers choose the right ink systems for cotton, polyester, tri-blends, fleece, and performance apparel. Understanding the differences between LC (Low Cure) and LC/LB (Low Cure / Low Bleed) plastisol inks can help prevent costly production problems while improving print quality and durability.
What Is LC Plastisol Ink?
LC stands for Low Cure plastisol ink. These inks are specifically formulated to fully cure at lower temperatures than traditional plastisol inks, often around 260°F–280°F instead of the standard 320°F range.
Low cure inks became increasingly popular as printers began working with:
- heat-sensitive garments,
- tri-blends,
- lightweight fabrics,
- performance apparel,
- and specialty textiles.
By reducing curing temperatures, LC inks help minimize:
- garment scorching,
- shrinkage,
- heat damage,
- and fabric distortion.
Low cure inks also allow shops to:
- increase belt speeds,
- reduce energy consumption,
- and improve production efficiency.
What Is LC/LB Plastisol Ink?
LC/LB stands for Low Cure / Low Bleed plastisol ink. These inks combine low cure technology with specialized dye migration resistance designed specifically for polyester and performance fabrics.
Polyester garments contain dyes that can migrate into plastisol ink during the curing process, especially when exposed to heat. This phenomenon, known as dye migration or dye bleeding, can cause prints to discolor, shift color, or develop unwanted staining after curing.
LC/LB inks contain advanced bleed-resistant chemistry and blocker systems that help reduce the migration of polyester dyes into the printed ink layer. These formulations are especially important when printing on:
- 100% polyester,
- athletic uniforms,
- sublimated garments,
- moisture-wicking apparel,
- and performance fabrics.
Why LC/LB Plastisol Inks Cost More
One of the primary reasons LC/LB inks cost more than standard LC inks is the complexity of the chemistry required to combat dye migration while still maintaining low cure capabilities.
Low bleed plastisol inks often contain:
- advanced resin systems,
- specialty pigments,
- dye-blocking additives,
- and higher-performance raw materials
designed to improve print stability on difficult polyester fabrics.
Balancing low cure temperatures with dye migration resistance is technically more challenging than manufacturing standard low cure inks. The formulation must:
- block migrating dyes,
- remain flexible,
- maintain opacity,
- resist wash degradation,
- and still cure properly at reduced temperatures.
This added performance comes at a higher manufacturing cost, which is reflected in the price of LC/LB ink systems.
Polyester Printing Challenges
Polyester garments are one of the most difficult materials to print successfully due to their tendency to release dyes when heated.
Common polyester printing problems include:
- dye migration,
- color shifting,
- ghosting,
- scorching,
- and inconsistent curing.
Red, maroon, black, navy, and highly saturated garments are especially prone to bleeding issues. Even after a print appears stable initially, dye migration can continue hours after production if improper ink systems or curing methods are used.
Athletic wear and performance apparel often require lower cure temperatures combined with strong bleed resistance to maintain print quality.
Tri-Blend Printing Challenges
Tri-blend garments combine cotton, polyester, and rayon fibers, creating unique printing challenges.
Many printers prefer low cure inks for tri-blends because they:
- reduce heat exposure,
- help preserve garment softness,
- minimize scorching,
- and maintain softer hand feel.
However, tri-blends can still experience mild dye migration depending on:
- polyester content,
- garment dye systems,
- and curing temperatures.
Choosing the correct ink often depends on balancing:
- softness,
- opacity,
- cure temperature,
- and bleed resistance.
Pros and Cons of LC Plastisol Inks
Advantages of LC Inks
Low cure inks offer several production advantages:
- lower curing temperatures,
- softer print feel,
- reduced scorching risk,
- faster production speeds,
- and improved energy efficiency.
They are often excellent for:
- cotton garments,
- tri-blends,
- fashion apparel,
- and lightweight fabrics.
Disadvantages of LC Inks
However, standard LC inks may provide limited dye migration resistance on polyester and polyester garments. When used on problematic fabrics, printers may experience:
- color shifting,
- bleeding,
- ghosting,
- or post-cure discoloration.
For many polyester applications, standard LC inks may not provide enough long-term protection, as you have to precisely control the cure temp. If you hit 300F or higher, you increase the chances of dye migration. If your ink temp doesn't reach the minimum cure temp, usually around 270-280F the ink will fail due to incomplete fused ink.
Pros and Cons of LC/LB Plastisol Inks
Advantages of LC/LB Inks
LC/LB inks are specifically engineered for:
- polyester printing,
- athletic apparel,
- moisture-wicking fabrics,
- team uniforms,
- and difficult synthetic garments.
Benefits include:
- improved dye migration resistance,
- lower cure temperatures,
- stronger print stability,
- better long-term durability,
- and safer polyester printing performance.
Disadvantages of LC/LB Inks
Because of the added bleed-resistant chemistry, LC/LB inks may:
- cost more,
- feel slightly firmer,
- flash differently,
- or require additional print adjustments.
Best Applications for Each Ink Type
LC Inks Are Often Best For:
- cotton garments,
- fashion apparel,
- tri-blends,
- lightweight shirts,
- and soft-hand printing.
LC/LB Inks Are Often Best For:
- 100% polyester,
- sportswear,
- athletic uniforms,
- sublimated garments,
- moisture-wicking apparel,
- and performance fabrics.
Matching the ink system to the garment type is critical for achieving consistent, durable results.
How to Prevent Dye Migration
Reducing dye migration requires more than simply choosing the correct ink. Successful polyester printing also depends on:
- proper curing temperatures,
- controlled flash settings,
- underbase selection,
- garment testing,
- and production consistency.
Many professional printers also use:
- low bleed underbases,
- blocker inks,
- lower flash temperatures,
- and reduced dryer dwell times
to further minimize migration problems.
Testing garments before large production runs is always recommended, especially when working with unfamiliar polyester fabrics.
Frequently Asked Questions
What does LC plastisol ink mean?
LC stands for Low Cure plastisol ink formulated to cure at lower temperatures than traditional plastisol inks.
What does LC/LB plastisol ink mean?
LC/LB stands for Low Cure / Low Bleed plastisol ink designed to resist dye migration on polyester garments.
Why do low bleed plastisol inks cost more?
Low bleed inks use advanced chemistry, blocker technology, and specialty raw materials to improve dye migration resistance.
Can regular plastisol ink be used on polyester?
It can, but polyester garments may experience dye migration and print discoloration if proper ink systems are not used.
What is dye migration?
Dye migration occurs when garment dyes bleed into the printed ink layer during or after curing.
What is the best ink for athletic apparel?
Many printers prefer LC/LB plastisol inks for athletic apparel because they combine low cure temperatures with improved bleed resistance.
Final Thoughts
As polyester and performance apparel continue growing in popularity, understanding the differences between LC and LC/LB plastisol inks is becoming increasingly important for professional screen printers.
While LC inks offer excellent low-temperature performance and soft-hand printing characteristics, LC/LB systems provide additional protection against dye migration on difficult polyester garments.
Choosing the correct ink system can dramatically improve:
- print durability,
- color stability,
- production consistency,
- and long-term customer satisfaction.
At KOLORMATRIX, we help printers select the right plastisol ink systems for cotton, polyester, tri-blends, sportswear, and commercial apparel production.
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