In wide-format printing, ink isn’t just a consumable—it’s a performance decision. The wrong choice can lead to scuffing, odor complaints, clogged heads, or premature fading. The right choice keeps production smooth, installs clean, and customers happy. When shops start comparing SS21, ES3, and BS4, they’re usually trying to solve something specific: durability, ventilation concerns, cost control, or machine compatibility.

If you’ve been asking, What’s the difference between SS21, ES3, and BS4 inks? you’re not alone. These three Mimaki solvent ink families serve similar markets but behave differently in real-world production. Let’s break them down in practical, production-focused terms so you can choose confidently—especially if you’re actively searching for Mimaki Solvent Inks for sale.

What’s the difference between SS21, ES3, and BS4 inks? A practical overview

At a high level, all three are solvent-based pigment ink systems designed for signage, decals, banners, and graphics. They’re built for durability and media versatility. But they are not interchangeable, and they are not identical in performance.

SS21 is widely considered a production-standard solvent ink. It’s known for strong outdoor durability, good scratch resistance, and broad media compatibility. Many shops use SS21 as their everyday workhorse for signage and wraps because it’s consistent and predictable.

ES3 is typically positioned as an eco-solvent alternative. It focuses on lower odor and a more office-friendly printing environment while still delivering solid color and outdoor performance. In many workflows, ES3 benefits from lamination when abrasion resistance is critical.

BS4 is a solvent pigment ink system often supplied in bag-based formats for certain Mimaki platforms. It is designed for stable signage production with indoor and outdoor capability. Like the others, it must match your specific printer configuration.

The biggest mistake we see? Assuming you can casually swap between them. You can’t. Ink system compatibility matters.

Compatibility comes first

Before comparing durability or cost, you must confirm printer compatibility. Mimaki machines are configured for specific ink systems. Switching families may require proper flushing, maintenance liquid, and system preparation. Skipping this process risks clogs, contamination, and expensive downtime.

Always verify compatibility directly with Mimaki or your authorized supplier– we recommend DPI Supply for Mimaki products.

If your printer is configured for SS21, that’s typically the safest long-term route unless you intentionally plan a controlled changeover. The same logic applies to ES3 and BS4. Compatibility is not optional—it’s foundational.

When people ask, What’s the difference between SS21, ES3, and BS4 inks? the honest first answer is: “Which one is your printer designed to run?”

-Which ink gives the best outdoor durability?

Outdoor durability is where most comparisons get serious.

In general production conversations, SS21 is often viewed as the durability-forward option. It is commonly used for vehicle graphics, long-term signage, and decals that may face UV exposure and abrasion. Many shops rely on it when they need strong outdoor performance without overthinking every job.

ES3 can absolutely be used outdoors. However, many operators treat lamination as essential when using ES3 for high-abrasion or extended outdoor exposure. With proper media and finishing, ES3 performs well, but it may not be chosen as the default for heavy-duty fleet work without laminate.

BS4 is also marketed for indoor and outdoor signage durability within supported systems. Like the others, real-world lifespan depends on exposure conditions, media choice, and whether lamination is applied.

Here’s the truth most suppliers won’t overcomplicate: durability isn’t just ink. It’s ink + media + environment + finishing. But if you’re ranking strictly on common shop reputation for toughness, SS21 often leads that conversation.

Scratch resistance and handling

Scratch resistance matters more than people admit. Prints look perfect on the take-up reel. Then they get trimmed, rolled, transported, installed—and suddenly the surface tells a different story.

SS21 is widely recognized for solid handling durability. Many installers feel comfortable working with it, especially when time is tight and lamination isn’t immediate.

ES3 prints can look excellent but may benefit more from lamination in abrasion-heavy environments. If you laminate everything anyway, this becomes less of a concern.

BS4, like most solvent pigment inks, performs well for signage production but should still follow best practices when handling high-contact graphics.

In practical terms: if your shop routinely produces vehicle wraps, high-touch decals, or exterior graphics, prioritize scratch resistance in your decision-making process.

Odor and work environment

Production environment comfort is real. Solvent inks naturally produce odor, but formulations differ.

ES3 is typically associated with a more eco-solvent-friendly printing environment. Shops operating in tighter spaces or shared commercial buildings may appreciate this aspect. Reduced odor can improve overall shop comfort, especially during long runs.

SS21 is a true solvent ink and may produce stronger odor compared to eco-solvent formulations. Proper ventilation is important.

BS4 also falls within solvent-based systems and should be handled with appropriate ventilation and safety procedures.

If your workspace is enclosed or customer-facing, ES3 may be attractive. If your facility is fully ventilated industrial space, odor may not weigh heavily in your decision.

Color consistency and profiling

Color quality is rarely about ink alone. It’s about profiling discipline.

SS21 is often praised for predictable output once profiles are dialed in. Many production shops stick with it because they’ve already invested time perfecting their color workflows.

ES3 can deliver vibrant, accurate results on the right coated media. However, it may require updated profiles if switching from another ink system.

BS4 also supports vivid signage production but, like any solvent system, depends heavily on proper RIP configuration.

If you change ink families and keep old profiles, expect inconsistent color. Profiling is not optional. It’s part of the investment.

Making the right decision when comparing Mimaki Solvent Inks for sale

When you see listings for Mimaki Solvent Inks for sale, don’t focus solely on price per cartridge or bag. The real cost includes:

• Printer compatibility
• Downtime risk
• Reprints due to scuffing
• Lamination requirements
• Ventilation needs

If your shop prioritizes durability and production reliability, SS21 is often the safe, widely trusted option.
If environmental comfort and lower odor matter most—and you laminate regularly—ES3 may fit well.
If your system supports BS4 and you want a solvent-based signage solution in that configuration, it can be a strong choice.

The best ink is not the one with the lowest price tag. It’s the one that supports your workflow with the fewest surprises.

Final Thoughts

Choosing between these three options isn’t about hype—it’s about alignment. When someone asks, What’s the difference between SS21, ES3, and BS4 inks? the answer depends on what you print, how you finish it, and how your shop is set up.

SS21 is often associated with durability and production strength.
ES3 leans toward eco-solvent comfort with solid performance.
BS4 serves supported Mimaki systems with reliable signage output.

If you understand your workflow and respect compatibility, the decision becomes straightforward. Ink isn’t just fluid in a cartridge. It’s the foundation of every print leaving your shop.