How to Choose the Right PMU (Permanent Makeup) Machine for You? 🖌️
Stroke (or "needle throw") refers to the distance the needle travels from its highest to lowest position. In rotary machines, stroke depends on the distance between the bearing and cam center: the farther the bearing is from the cam, the longer the stroke.
Common stroke ranges:
Short stroke (1.8mm–2.5mm)
Medium stroke (3.0mm–3.5mm)
Long stroke (4.0mm+)
- Determines needle force: Longer strokes = greater needle impulse and power. This helps larger needle groups penetrate thicker skin but risks over-traumatizing delicate areas. Short/medium strokes are ideal for facial zones.
- Affects needle speed: Longer strokes may reduce needle retraction speed.
- Limits penetration depth: Short strokes restrict needle extension, ensuring consistent pigment pickup and minimizing skin trauma.
| Stroke Type | Applications | Limitations | Recommended Machines |
|
Short (1.8mm–2.5mm) |
Thin or sensitive skin. Gentle "ombre shading" techniques Layered, natural effects (e.g., soft powder brows/lips). |
Limited for line work or dense shading. Requires multiple passes for full saturation. Over-extended needles risk pigment buildup. |
Biomaser U1 |
|
Medium (3.0mm–3.5mm) |
Medium-thick skin. Efficient pigment packing and blending. Versatile for shading and line work. |
Not ideal for extremely thick skin. |
Biomaser U1 |
|
Long (4.0mm+) |
All skin types (with controlled pressure). Bold lines and deep pigment implantation Suitable for resilient skin. |
High risk of over-trauma in sensitive areas. Requires light pressure to avoid over-pigmentation. |
Atto Origin Pro |
Biomaser P90 Pro (3.0mm stroke) 🏆: Perfect for balanced power and precision.
Low voltage (3–7V): Slower needle movement → lighter shading, perfect for soft gradients.
High voltage (8V+): Faster needle movement → denser pigment packing, ideal for bold lines.
- Combine slow machine speed with fast hand speed for airy, diffused effects. 🌬️
- Pair high machine speed with slow hand speed for solid, saturated results. 🎯
- Practice on Silicone Practice Skin to master the balance! Avoid "teardrop-shaped" pigment dots—they signal mismatched speed settings.
- Beginners: Opt for adjustable short/medium-stroke machines for versatility.
- Experts: Long-stroke machines for advanced techniques and thick skin.
Share your questions or experiences below, and don’t forget to spread this guide to help others! 💬✨