Tattoo Liner Cartridges - Tattoo Liner Cartridges

What Are Tattoo Liner Cartridges?

Liner cartridges are self-contained, round liner systems designed specifically for creating clean, precise lines. The needle grouping, housing, tip, and membrane come factory-matched in a single disposable unit that clicks into any pen-style machine. No tube matching, no separate components to assemble, and switching between liner configurations takes seconds, especially when you stock professional tattoo cartridges for your studio.

The sealed bladder membrane inside each liner cartridge serves as the needle's return spring; it pulls the needle bar back after each machine stroke, and a quality membrane delivers consistent recoil from the first cartridge to the last so the hit feels the same throughout the session. The sealed design also prevents ink and blood from reaching the machine motor, and meets health department requirements where sealed barrier systems are mandated for tattoo cartridges.

Liner stability is what matters most in a liner cartridge; the needle configuration must run straight on every stroke, whether you are working on slow detail or pushing through longer lines. Not all cartridge brands include a stabilisation system in their liners. Eikon includes one in every liner cartridge (RL, SRL, and HRL), and we hear from artists who said they could never line with cartridges, or would only line with coils, who now use Eikon liner cartridges for all their linework.

Eikon Tattoo Supply carries liner cartridges and a full range of tattooing supplies from Kwadron, Cheyenne, TEX, and Lotus, plus our own Eikon Cartridges line with the full RL, SRL, and HRL liner progression, alongside Eikon-branded supplies trusted by professional artists across Canada. All tattoo cartridges are compatible with all pen-style machines, including Bishop and Cheyenne rotary machines we carry in-store.

Round Liner Configurations: RL, SRL, and HRL Explained

Round Liners (RL) pull needles into the tightest possible grouping for the crispest, sharpest linework. High-point soldering holds the professional tattoo needles together as close as the diameter allows, and the tighter the grouping, the more controlled the line. Available from 1RL single-needle up to 14RL for bold lines, in all three Eikon diameters (0.25mm Purple, 0.30mm Blue, 0.35mm Red).

Straight Round Liners (SRL) use a lower soldering point that allows the needles to flare more at the tip, a looser grouping that delivers bolder lines with more ink per pass. SRL is the next step when an artist wants a bolder line than a standard RL without jumping to a larger needle count or switching to tattoo shader needles. Currently available in 0.35mm Red across three counts.

Hollow Round Liners (HRL) remove the centre needle from the grouping, same tightness as a standard RL at the soldering point, but the hollow centre holds more ink and creates bold lines with less skin trauma and fewer passes needed for saturation. HRL counts are even numbers (06, 08, 10, 12) because the centre pin is removed from the odd-count RL base. Available in 0.35mm Red. 

The progression matters: RL for the crispest lines, SRL for bolder lines with more ink delivery, HRL for bold lines with less trauma. All three include Eikon's stabilisation system. Eikon's full RL to SRL to HRL progression is a signature of the house brand, and it gives liner artists specific options that a generic "round liner" listing does not cover. 

Needle Diameter Guide for Liner Cartridges

Needle diameter is the thickness of the individual wire; it determines how fine or bold your lines are, how much ink each tattoo needle cartridge carries, and how much trauma each puncture creates. Eikon offers cartridge needles in three diameters: 0.25mm (bugpin, Purple label), 0.30mm (Blue label), and 0.35mm (standard, Red label). Whether you're selecting tattoo needle cartridges for delicate fine-line work or bold traditional lining, diameter is a tool selection, not a quality ranking; each serves a different purpose.

Bugpin (0.25mm) produces the finest puncture and the tightest possible groupings because thinner wire packs closer together at the same soldering point. This is Eikon's top-selling liner diameter; artists use it for fine-line work and micro-realism, but also as their everyday liner because they prefer the finer puncture and tighter grouping. When a customer asks for bugpin, we reach for the 0.25mm Purple boxes.

Standard diameter (0.35mm) creates a bolder puncture with more ink delivered per pass, the go-to for traditional-style linework and any application where maximum ink deposit and line weight matter. The 0.30mm Blue sits between the two: fine enough for detailed work but with slightly more ink per pass than bugpin for artists who want that balance.

Needle count is only half the equation; a 5RL in 0.25mm produces a finer line than a 3RL in 0.35mm because diameter and count interact to determine the actual line weight on skin. Artists who understand this can shift the diameter up or down to get the line weight they want without changing needle count. Eikon's colour-coded housings make this practical: Purple, Blue, Red, visible from the box to the station.

Long Taper vs. Medium Taper for Liner Cartridges

Long taper is the default for liner cartridges; the sharper point creates smaller puncture holes with less resistance per strike, meaning less skin trauma and a smoother feel during extended lining sessions. 90% of Eikon's entire needle line is long taper, and every standard Eikon liner (RL, SRL, HRL) uses long taper.

The reduced resistance of a long taper also means less fatigue, and less force per stroke adds up over a full lining session. For most linework, from fine-line detail to bold lines, long taper is the right choice.

Medium taper has a blunter tip that holds more ink right at the point of contact and deposits more pigment per pass. In Eikon's cartridge lineup, medium taper appears in select Red Label curved magnums for colour packing, not in standard liner configurations. Other brands Eikon carries (Kwadron, Cheyenne Premium, Lotus) offer medium taper liners for artists who specifically want a heavier ink deposit per strike.

What Are Power Liner Cartridges?

Power liners are a cartridge category designed for bold, saturated lines. They use tight groupings in standard or larger diameter (0.35mm+) with features that maximise ink delivery for thick, consistent lines. The term comes primarily from Cheyenne, whose Power Liner and Capillary Power Liner cartridges are the most recognised in this category. Cheyenne's Capillary Power Liners feature an internal ink reservoir that holds significantly more ink than standard cartridges, allowing artists to pull longer, uninterrupted bold lines without re-dipping as often.

Power liners are popular for traditional, neo-traditional, and blackwork styles where consistent line saturation matters. The key features are tight needle groupings in 0.35mm (#12) or larger diameter for heavy ink deposit, and cartridge designs that maintain consistent ink delivery throughout longer line pulls.

Eikon carries Cheyenne Safety Cartridges, which include their Power Liner configurations. Within Eikon's own cartridge lineup, the approach to bolder linework is the RL to SRL to HRL progression: Standard Round Liners (RL) deliver the crispest lines, Straight Round Liners (SRL) use a lower soldering point for bolder lines with more ink per pass, and Hollow Round Liners (HRL) remove the centre needle for bold lines with less skin trauma and fewer passes for saturation.

What to Look for in Quality Liner Cartridges

Membrane quality shows up as consistent recoil; the hit should feel the same at hour six as it did at the start. A quality sealed bladder membrane provides firm, even needle return throughout a full session, and the sealed design keeps ink and blood out of the machine motor. Machine manufacturers void warranties for ink contamination, so this is practical protection for pen-style setups.

Stabilisation is the single biggest quality differentiator in liner cartridges. A stabilised liner runs straight on every stroke, no chatter, no wandering, consistent line quality, whether you are working on slow detail or pushing through longer lines. Not all brands include stabilisation in their liners. Eikon includes it in every liner (RL, SRL, HRL).

Needle sharpness consistency across the box matters more than steel grade claims; every cartridge should perform the same, with no dull points or barbs that force you to push harder or swap mid-section. You cannot evaluate sharpness by looking at a cartridge; it is something you only know once you try it, which is why box-to-box consistency is what builds trust in a liner brand.

Housing design is quality-of-life: a one-piece molded tip that will not pop off during cleaning, a clear tip that lets you see needle placement and confirm the cartridge is clean between colours, and anti-roll grooves that keep the cartridge secure even when lubricated with ink. These features do not affect line quality directly, but they make the session smoother. 

Professional Liner Cartridge Brands at Eikon

Eikon Cartridges, Eikon's own line, is backed by 30+ years of needle-making expertise from Eikon Device, headquartered in Kingston, ON. The internal stabilisation system in every liner, the full RL to SRL to HRL progression across three diameters, and colour-coded housings (Purple 0.25mm, Blue 0.30mm, Red 0.35mm) make this the most complete liner system in the store. 50+ configurations across 6 groupings at $27.95-33.95 CAD per box of 20. 

Kwadron Cartridges bring their own needle stabilisation system and medical-grade plastic tips designed to reduce friction and keep needles sharper longer. 50+ configurations across three diameters and two taper lengths. The broadest third-party lineup Eikon carries. Artists who want maximum configuration options across liners and mags find them here ($32.09-72.75 CAD).

Cheyenne Safety Cartridges offer a patented safety membrane design from Germany, with Standard and Premium lines. Premium features a longer taper grind, tighter soldering, and their shortest soldering length for the crispest lines, a real product decision for artists evaluating liner precision. Eikon also carries Cheyenne machines for a matched ecosystem ($32.20-40.60 CAD).

TEX Cartridges are designed by James Tex, a world-renowned tattoo artist and Ink Master contestant. 37 configurations built around the setups he uses most, with 316H steel and precision-honed tips. A Canadian brand (Deadly North), biodegradable packaging, and the most affordable third-party cartridge in the store ($28.99-36.99 CAD). 

Lotus Cartridges and Bar Needles are here. Hailed as "The World's Best Needles, crafted for the World's Best Artists," Lotus is the brainchild of tattooers Ryan Ussher (Australia) and TomTom (New Zealand). Eikon is the official and exclusive Canadian distributor. The lineup runs 60+ configurations across bars and cartridges and includes classics plus potential new favourites like Medium Taper Liners and Ultra Small 0.20mm (#06 gauge) Liners. Premium Japanese 316L stainless steel, individually checked at a 99.8% perfection rate, trusted by experienced artists around the globe. Lotus Cartridges deliver the feel and performance of a true bar needle — with zero fluff and unmatched consistency. Liner configurations include Standard, Classic, Super Tight, Fine, BugPin Tight, and Ultra Small Liners, plus Round Shader, Magnum, and Curved Magnum for cartridge setups ($35.95-40.95 CAD). 

Browse the full range across brands and diameters in our best tattoo cartridges collection. 

Buy More Save More on Eikon cartridges: 10% off when you pick up 5 or more boxes, mix and match across configurations.

Liner Cartridge Care and Replacement

Liner cartridges are single-use; each cartridge is designed for one client session and must never be reused. This is a health and safety requirement: check with your local health department for specific single-use and disposal regulations in your jurisdiction.

Within a session, needle sharpness degrades gradually as you work. Signs that it is time for a fresh cartridge: the needle feels like it is dragging rather than gliding, you need to make more passes for the same line quality, or lines are coming out rougher than they did at the start. If the cartridge is not performing the way it did when you opened it, swap it.

Changing liner cartridges between major sections or when switching between significantly different line weights is common practice. The snap-on cartridge format makes this a seconds-long change, one of the original advantages that made cartridge systems popular tools among professional artists, and having fresh cartridges ready on the station keeps the session moving.

Eikon cartridges come in boxes of 20, with each cartridge individually sealed. Eikon does not sell products with less than 6 months until expiry — everything on the shelf has usable life remaining.