Complete guide: Tattoo Needle Cartridge Hummingbird RM
Hummingbird RM cartridges are disposable tattoo needles in a Round Magnum configuration with a soft edge ("Soft Edge"), designed for shading and fine gradients. The progressively shorter outer needles create smooth transitions, without hard edges, from dense ink to clean skin. They are made of stainless steel, have a safety membrane that prevents blood and ink from entering the machine, and come individually sterilized, with a medical-grade plastic tip and biodegradable packaging. They suit both beginners practicing shading and professionals seeking an affordable consumable for daily work.
How to use
- Wash your hands, put on new gloves, and set up your workstation with disposable protective barriers (wrap on the machine, cover on the clip cord or battery).
- Check the cartridge blister: it must be sealed, intact, and within its expiration date. If it is unsealed or damaged, do not use it.
- Remove the cartridge from the blister without touching the tip and insert it into the pen-style machine grip until it is firmly secured.
- Adjust the needle protrusion and voltage — for RM shading, a guideline is 7–9V, fine-tuned based on your machine, cartridge size, and technique.
- Dip the tip into the ink cup and test the flow on artificial skin before working on a client.
- Shade with smooth motions (circular or pendulum-like), letting the RM configuration's soft edge build the gradient — do not press excessively.
- During the session, wipe off excess ink with a disposable tissue and re-dip the tip into the cup as needed.
- At the end of the session, remove the cartridge from the grip and discard it in a sharps container — it is strictly single-use.
Tips from us
- Choose the size based on the area: the range goes from 7RM to 15RM — small configurations for tight spaces and details, large ones for broad surfaces; 9RM is considered the most versatile for general shading.
- For very soft effects or watercolor style, dilute the ink and work at moderate voltage with fluid motions and light passes.
- Practice gradients on artificial skin until you achieve clean, consistent transitions — technique matters more than equipment.
- Keep a stock of the sizes you use frequently so you don't run out of consumables in the middle of a job.
- Store cartridges in their original packaging, in a dry place, away from moisture and direct light.
- The safety membrane protects the machine from backflow but does not replace sanitizing the grip and using protective barriers — use them together, not as alternatives.
Warning: Cartridges are sterile and strictly single-use: do not reuse them or attempt to re-sterilize them. Do not use a cartridge if the blister is unsealed, perforated, or expired. After the session, discard it in a designated sharps container according to biosafety regulations. The internal membrane limits the entry of blood and ink into the machine, but disinfecting the equipment and changing protective barriers remain mandatory for each client.
Frequently asked questions
Which machines are Hummingbird RM cartridges compatible with?▾
They are standard-system cartridges compatible with pen-style machines that accept universal cartridges. If your machine works with standard cartridges from other brands, it will most likely accept Hummingbird RM as well — however, check your grip's specifications before ordering.
What does "RM" mean and when should I choose it over an RL?▾
RM stands for Round Magnum with Soft Edge: the needles are arranged in a rounded pattern, with the outer needles progressively shorter, creating soft shades and gradients without harsh lines. RL (Round Liner) groups needles tightly in a circle for precise outlines. In short: RL for lines, RM for shading, smooth fills, and transitions — many jobs use both configurations.
What sizes are available and where should I start?▾
The Hummingbird RM range covers 7RM to 15RM, with needles of 0.35 mm (#12) diameter and medium taper. For small areas and details, choose 7RM–9RM, and for large surfaces, 13RM–15RM. If you are a beginner, 9RM is the most versatile choice, possibly complemented by 11RM for medium areas.
What voltage should I use with an RM cartridge?▾
A guideline for shading is 7–9V: toward the lower end for very soft shades and diluted ink, toward the upper end for denser fills. The optimal voltage depends on your machine, cartridge size, and hand speed, so always test on artificial skin and fine-tune before working on a client.
Can I reuse a cartridge if I only used it on artificial skin?▾
It is not recommended. Cartridges are designed as single-use products: after use, the tip wears, ink flow becomes unpredictable, and sterility is permanently lost. Even when practicing, get used to opening a fresh cartridge for each session — this builds the right hygiene reflexes for working on clients.
How do I check that a cartridge is sterile before use?▾
Each cartridge comes individually sterilized in blister packaging. Before use, inspect the blister: it must be completely sealed, without perforations or signs of moisture, and within the expiration date. Any cartridge with compromised packaging should be discarded — it is not worth the risk of contamination for a consumable.
Product description
Cartridge needles The needles have a safety membrane that prevents blood and ink from entering the handle. Precision is the strong point when it comes to cutting needles. The packaging is biodegradable and the plastic from which the tip is made is medical. Material: Stainless steel The needles are single-use and sterile packaged The price is per piece
Hummingbird RM Cartridge Needles are Round Magnum (Soft Edge) cartridges from the value Hummingbird range, delivering smooth shading at the most accessible price in the quality cartridge segment. The RM configuration with progressively shorter outer needles creates gradients without hard edges, enabling natural transitions from dense ink to clean skin. The functional safety membrane prevents backflow and ensures adequate ink flow, while surgical steel with #12 gauge (0.35mm) and medium taper provides constant penetration. Universal compatibility with all pen-style machines — works on Cheyenne Sol Nova, FK Irons Xion, Bishop Fantom, Dragonhawk Mast, EZ P2S, and any other machine with standard cartridge grip. Available from 7RM through 15RM, covering everything from small detailed areas to large surfaces for sleeves and back pieces. At Hummingbird pricing (45-70 RON for 20 cartridges), you get a functional RM covering most artists' soft shading needs. Compared to Da Vinci V2 RM, Hummingbird loses slightly on ink flow but wins on price. Against Cheyenne Craft RM, loses on brand and consistency but at significantly lower cost. Not at the premium level of Cheyenne Safety RM or Kwadron RM, but sufficient for neo-traditional, semi-realism, watercolor, and intensive shading practice. Box of 20 individually EO-sterilized cartridges, CE compliant. Pricing allows generous consumption without financial pressure — invest the difference in quality ink and practice.
Frequently Asked Questions Does Hummingbird RM produce acceptable gradients? Yes, Hummingbird RM produces functional gradients acceptable for most styles. The soft edge configuration creates transitions without hard edges, even if not at the finesse of Cheyenne Safety or Kwadron. For neo-traditional, semi-realism, and general shading, results are satisfactory. For competition realism portraits or ultra-fine work, invest in premium brands. Good technique compensates for equipment differences — a skilled artist with Hummingbird RM beats a mediocre artist with Cheyenne Capillary. What voltage for Hummingbird RM? Optimal voltage: 7-9V. Soft shading: 7-7.5V. Standard shading: 7.5-8.5V. Soft color packing: 8.5-9V. Hummingbird membrane may require slightly higher voltages than premium. Test and adjust. What Hummingbird RM sizes are available? Hummingbird RM: 7RM, 9RM, 11RM, 13RM, 15RM. 9RM most versatile. #12 gauge, medium taper. Recommended stock: 9RM + 11RM. Hummingbird RM vs Da Vinci V2 RM? Da Vinci V2 RM has slightly better ink flow (Bishop membrane) and brand recognition. Hummingbird RM wins on price (15-25% cheaper). Practical difference: small. If budget is tight → Hummingbird. If you can invest slightly more → Da Vinci V2. Does Hummingbird RM work on all machines? Yes, universal compatibility with all standard pen-style machines. Works on all brands: Cheyenne, FK Irons, Bishop, Dragonhawk, EZ, and others. Popular entry-level combination: Dragonhawk Mast + Hummingbird RM — complete shading setup at minimum price. Is Hummingbird RM sterilized? Yes, individual EO sterilization, hermetic blister, sterilization indicator, lot number, expiration date. CE. Biosafety guaranteed. Is Hummingbird RM good for neo-traditional? Yes, Hummingbird RM at 8-9V with vibrant inks (Eternal, World Famous) produces colored fills with acceptable soft transitions for neo-traditional. Combined with Hummingbird RL for outlines, you have a complete neo-traditional setup at minimum price. Results will not match Cheyenne Safety, but will be completely acceptable for studio work. How much does Hummingbird RM cost?45-70 RON / 20 pcs — the most accessible quality RM on the market. At this price, invest saved money in quality ink and practice skin. Can Hummingbird RM be used for watercolor? Yes, Hummingbird RM 7RM-9RM with diluted ink works acceptably for watercolor. The soft edges of RM create the desired effect. Hummingbird membrane handles diluted inks at moderate dilutions (1:1, 1:2). Moderate voltage (7-7.5V), fluid movements. Is upgrading from Hummingbird RM to Cheyenne Safety RM worth it? If you tattoo professionally daily, yes. The price difference per cartridge (5-7 RON) is felt in gradient quality and consistency. If you tattoo occasionally or are starting out, Hummingbird RM provides a solid foundation. Tip: when you can create 10 distinct tonal levels on practice skin, you are ready for the upgrade.
