Kwadron RM (Round Magnum) has needles arranged in a fan with curved tips, providing soft transitions and gradual shading. Kwadron M1 (Magnum) has needles arranged flat in two rows, providing denser, more uniform coverage. RM is preferred for portraits and realism, while M1 is chosen for dense color packing and large uniform areas.

For portraits, we recommend Kwadron RM in 9RM or 11RM configurations with 0.30mm needles. These configurations offer the ideal balance between coverage and fine transition control. For small areas and details, a 7RM is perfect, while for large background areas, a 15RM or 17RM will speed up the process without sacrificing quality.

Technically, RMs can be used for whip shading techniques or textured lines, but they are not designed for classic lining. The curved configuration distributes ink over too wide an area for precise lines. For lining, always use Kwadron RL. However, experienced artists use small RMs (7RM) for specific textural effects.

For Kwadron RM, the optimal pen speed ranges from 6-8V for delicate shading and 8-10V for dense color packing. Lower speed allows softer transitions and superior control, while higher speed saturates faster. We recommend starting at low voltage and gradually increasing until you achieve the desired result on the specific skin type.

Kwadron RM stands out through the precise and consistent curvature of needles, achieved through a controlled manufacturing process in Poland. Unlike generic brands, each needle is individually polished, eliminating micro-imperfections that cause skin trauma. The Kwadron membrane has superior sealing, and the 316L steel is certified medical grade.

Kwadron RM is available in configurations starting from 7RM (7 needles) up to 23RM (23 needles) and even higher. The most popular are 9RM and 11RM for medium-sized work, 13RM-15RM for large areas, and 17RM-23RM for rapid background fills. The number before RM indicates exactly how many needles the grouping contains.

Yes, Kwadron RM is an excellent choice for peppered shading due to the curved configuration that allows partial needle contact with the skin. Using a rapid in-and-out motion with minimal needle exposure, you achieve the specific textured effect. Smaller configurations like 7RM or 9RM are ideal for this technique.

For Kwadron RM, the optimal penetration depth is 1.5-2mm into the dermis, adjusted from the pen. For delicate shading, reduce needle exposure to 1-1.5mm. For dense color packing, increase to 2-2.5mm. The correct depth depends on the body area and skin type — areas with thin skin require less penetration to avoid blow-out.

After using Kwadron RM cartridges, remove the used cartridge and dispose of it in the biological waste container. Fully disinfect the pen with an approved disinfectant solution. Wipe the grip and body with disinfectant wipes. Autoclave detachable components if the pen manufacturer allows it. Never reuse a cartridge — they are strictly single-use.

Kwadron RM cartridges offer major advantages: instant switching between configurations without stopping the machine, anti-contamination safety membrane absent in bar needles, much faster setup and cleanup, compatibility with modern pens that are quieter and lighter. The minor disadvantage is slightly higher per-unit cost, offset by superior operational efficiency.