Tattoo Needles and Tips - Tattoo Needles and Tips

Understanding Tattoo Needle Configurations and Cartridge Tips

Round Liners (RL) deliver precise linework in the tightest groupings. Straight Round Liners (SRL) use a lower soldering point for bolder lines with faster ink delivery. Hollow Round Liners (HRL) remove the centre needle for bold lines with less skin trauma and fewer passes. Each delivers a different line quality from the same round format.

Curved Magnums (soft edge) handle smooth shading and body contour work, the most versatile shading configuration. Standard Magnums deliver sharp, defined edges and geometric shading. Round Shaders (RS) work for detail shading in smaller areas where a magnum would be too wide.

In cartridge format, these configurations come with integrated components: the sealed bladder membrane provides needle return and machine protection, the housing controls ink delivery, and clear tips let you see needle placement and confirm the cartridge is clean. In cartridge liners, Eikon includes a stabilisation system that keeps the needle running straight on every stroke.

Eikon carries both cartridges and traditional pre-made bar needles (Hydra Needles). Cartridges combine needle, tip, housing, and membrane into one disposable unit, no tube matching, no autoclave sterilisation of reusable tubes. Traditional setups use separate needles and reusable tubes that the artist assembles and sterilises between clients.

Choosing the Right Tattoo Needle for Your Work

Match configuration to the job: tight round liners (3RL-7RL) for fine-line work and details, larger liners (9RL-14RL) for bold traditional outlines, round shaders for soft colour transitions, curved magnums for large-area shading and colour packing.

Needle count determines line weight or coverage within a configuration, but count is only half the equation. A 5RL in 0.25mm produces a finer line than a 3RL in 0.35mm because count and diameter interact to determine actual line weight on skin.

Bugpin (0.25mm) creates the finest puncture and tightest groupings, one of Eikon's top-selling diameters, used for everyday lining as well as detail and micro-realism work. Standard (0.35mm) works for bold tattooing with maximum ink per pass. The 0.30mm offers a middle option.

Taper determines how the needle enters the skin: long taper for less resistance and less trauma (the default for most work), medium taper for more pigment per pass in colour packing. In Eikon's cartridge lineup, medium taper appears in select curved magnums. Other brands Eikon carries offer a medium taper across more configurations.

Needle Diameter: What Artists Need to Know

Needle diameter is the thickness of the individual wire; it determines puncture size, ink deposit per pass, and how fine or bold the result is. Eikon offers three diameters: 0.25mm (bugpin), 0.30mm, and 0.35mm (standard). Diameter is not a quality ranking; each serves a different purpose. Gauge numbers (8, 10, 12) correspond to these diameters but artists typically reference millimeters. 

Smaller diameter needles pack closer together at the same soldering point, creating tighter groupings. This is why bugpin configurations are the tightest and produce the finest lines. Larger diameters deliver more ink per pass but create larger puncture holes.

Eikon's colour-coded cartridge housings identify diameter at a glance: Purple (0.25mm), Blue (0.30mm), Red (0.35mm). The colour travels from the box to the cartridge base, visible even when cartridges are loose on your station. Diameter is the one specification you cannot see on the needle itself, which is why Eikon chose to colour-code for it.

Diameter and needle count together determine actual line weight: a 5RL in 0.25mm produces a finer line than a 3RL in 0.35mm. Artists who understand this can shift the diameter up or down to get the line weight they want without changing technique.

Taper Length and Its Impact on Tattooing

Taper is the length of the sharpened point of the individual needle, from the very tip to where the needle reaches its full diameter. It determines how the needle enters the skin: a longer, finer point creates less resistance per strike, while a shorter, blunter point pushes more ink into the skin with each pass.

Long taper is the default, 90% of Eikon's needle line uses long taper. The finer point creates less resistance per strike, less trauma, and smaller puncture holes. For linework, long taper paired with a tight configuration produces smooth, controlled lines that heal clean. The reduced resistance also means less fatigue for both the artist's hand and the client's skin over long sessions.

Medium taper has a blunter tip that holds more ink right at the point of contact, depositing more pigment per pass. It is about saturation efficiency, not depth control. In Eikon's cartridge lineup, medium taper appears in select curved magnums (Red Label) designed for colour packing. Other brands Eikon carries offer medium taper across more configurations.

Taper affects how the needle enters the skin, not the final working depth. Artists control depth through technique regardless of taper. Taper and soldering are independent variables: taper is the individual needle's point geometry, and soldering determines how tightly the grouping is held together.

Quality Features in Professional Tattoo Needles and Cartridges

Needle sharpness and consistency: quality needles maintain their edge throughout the session, no rough passes from dull points, no variation between cartridges in the same box. Diameter consistency between batches matters just as much: you do not want to buy bugpins and find the thickness varies. All needles are stainless steel, but the precision of the manufacturing determines consistency.

In cartridge liners, stability is the quality differentiator; the needle should run straight whether you are working on slow detail or pushing through longer lines. Eikon includes a stabilisation system in every liner cartridge that reduces chatter and keeps lining needles sharper longer.

Housing and tip design: one-piece molded tips will not pop off when you wipe down during colour changes, a known issue with two-piece designs. Clear tips let you see needle placement, monitor needle extension, and confirm the cartridge is clean. Anti-roll grooves on the housing body keep the cartridge from rolling on your station.

A quality membrane delivers consistent recoil from the first cartridge to the last; the hit should feel the same at hour six as at hour one. The sealed design keeps ink and blood out of the machine motor. Check with your local health department for sealed system requirements in your jurisdiction.

Proper Technique: Push or Pull When Tattooing?

Most artists pull the machine toward themselves for linework, better visibility of the line being created, and more consistent control. Pushing works for certain body contours and angles where pulling would be ergonomically difficult. Both are valid techniques that experienced artists switch between.

What the product affects: liner cartridges with Eikon's stabilisation system maintain consistent line quality regardless of direction, whether pulling or pushing, the needle stays straight in the housing. This is a meaningful improvement over early cartridges with elastic membranes, where pulling was more reliable than pushing.

Curved magnums accommodate both pushing and pulling on body contours without catching edges; the curved profile follows the skin's surface in either direction. Standard magnums require more care with direction because the flat edges can dig in if the angle is wrong.

The product choice that matters most for technique flexibility is cartridge quality: consistent membrane recoil, stable needle path, and a housing that does not shift during use. With quality cartridges, technique is about the artist's preference, not about compensating for the equipment.

Needle and Cartridge Compatibility with Tattoo Machines

All cartridge needles Eikon carries are compatible with all pen-style and rotary tattoo machines, Bishop, Cheyenne, and every other standard cartridge grip. The cartridge-to-grip interface is standardised across the industry. If a cartridge feels loose or pops off, check the grip and machine tolerances first. Machines connect to power supplies that control voltage and needle speed.

Traditional needle-and-tube setups require matching tube sizes to needle configurations; liners need tighter tubes, magnums need wider tubes. Cartridges eliminate this entirely: the tip comes factory-matched to the configuration, so the needle runs straight out of the box. Grips for cartridges are simpler and easier to clean than traditional tube grips.

Eikon carries both cartridge and traditional options: Eikon Cartridges, Kwadron, Cheyenne, TEX, and Lotus cartridges alongside Eikon's own Hydra pre-made bar needles. All cartridges work with Bishop and Cheyenne rotary machines and other cartridge grips we carry. For permanent makeup (PMU) and microblading, Eikon stocks specialised PMU cartridges and machines designed for cosmetic tattooing. 

Packaging Options: Boxes & Bulk

Eikon cartridges come in boxes of 20, with each cartridge individually sealed in its own blister pack. The configurations you stock depend on the art you do, a fine-line specialist may work with 5-6 configurations, while an artist covering multiple styles and sizes might have 10-15 different configurations at their station. Assorted sample packs let you test configurations before committing to full boxes.

Eikon's colour coding makes managing that variety practical: Purple (0.25mm), Blue (0.30mm), Red (0.35mm), visible on the box, on the blister pack, and on the cartridge base itself. You can spot the right diameter at a glance whether the cartridge is on the shelf, in the blister pack, or already out and loose on your station.

Eikon keeps the full cartridge lineup in stock, and artists can reorder their exact configurations without worrying about backorders. Buy More Save More on Eikon cartridges: 10% off when you pick up 5 or more boxes, mix and match across any combination of configurations.

Safety and Single-Use Standards

All professional tattoo needles and cartridges are single-use and must be discarded after each client session. Needles lose sharpness through use, and cartridges cannot be sterilised for reuse. Proper sharps disposal should follow your local health department regulations. Aftercare instructions for clients should include keeping the tattoo clean and moisturised during healing.

Quality needles with consistent sharpness create cleaner punctures that heal with less trauma; this is where needle quality directly affects client outcomes, not just the artist's experience during the session. Aftercare products and barrier film are available separately.

All cartridges and professional tattoo needles Eikon carries arrive individually packaged and pre-sterilised. Eikon does not sell products with less than 6 months until expiry; everything on the shelf has usable life remaining. Check packaging integrity before use. For complete tattoo supply needs, including aftercare, ink, and other essentials, Eikon ships across Canada from Kingston, Ontario.