MEDICAL-GRADE MANUFACTURING
ROUND SHADER TATTOO CARTRIDGES FOR SOFT SHADING & SMOOTH GRADIENTS
At R&G Bio, we manufacture disposable tattoo needle cartridges for shops, distributors, and permanent makeup artists worldwide. Our focus is simple: consistent performance and safety standards you can rely on.
The round shader (RS) line is built for shading and color packing. The needles sit in a round formation with slightly wider spacing than our round liners—so the ink deposits softer and blends more evenly. Artists reach for these on greyscale work, portraits, black and grey pieces, or anywhere they need smooth transitions. We carry 3RS through 14RS, with diameters from #08 (0.25mm) to #12 (0.35mm). Delicate shading or bold fills, you’ve got options.
Safety details matter. Each cartridge uses a membrane system to prevent backflow. Every unit gets individual EO gas sterilization and its own packaging. Full batch traceability comes standard. The needles are 316L surgical stainless steel in medical-grade polymer housings, manufactured in ISO Class 7 cleanrooms under ISO 13485 standards.
We also run OEM and ODM services: private labeling, custom configurations, and MOQ starting at 20,000 units.
Loose Circular Grouping
Smooth Gradients
Safety Membrane
OEM/ODM Ready
Model Reference
For example – 0803RS
08 – Needle Diameter (Gauge)
03 – Needle Count
RS – Needle Configuration
Needle Diameter (Gauge)
08 = #8 (Bugpin, approx. 0.25 mm)
10 = #10 (Standard, approx. 0.30 mm)
12 = #12 (Standard, approx. 0.35 mm)
Needle Count
01 / 03 / 05 / 07 / 09 / 11 / 13 / 14 / 15 / 17 / 18 / 23 / 27
Needle Type
RL = Round Liner
RS = Round Shader
M1 = Magnum (Double Stack)
RM = Round Magnum
What Are Round shader cartridges?
🔬 Needle Structure
Round Shaders use the same circular layout as Round Liners, just with the needle tips spaced a hair wider apart. That slight gap diffuses the ink, so you get a softer deposit instead of the tight, concentrated hit of an RL.
The number tells you the needle count—5RS means five needles, 7RS means seven. Smaller groupings like 3RS and 5RS give you tighter control for fine shading. Step up to 9RS, 11RS, or 14RS when you need to cover more skin and blend gradients faster. RS needles fall somewhere between the pinpoint accuracy of a liner and the broad sweep of a magnum.
Primary Uses & Applications
Soft Shading & Gradients: Creating smooth black & grey transitions and subtle color blends
Small Area Fills: Filling confined spaces where magnums are too large and RL too concentrated
Portrait Greyscale: Achieving realistic skin tones and delicate shadow work in portraits
Detail Shadows: Adding depth and dimension without harsh lines or edges
Color Blending: Mixing and transitioning between colors in neo-traditional and watercolor styles
PMU Shading: Soft powder brows, lip blush gradients, and delicate PMU effects
RS vs RL vs Magnum Comparison
|
Needle Spacing |
Looser than RL, tighter than Magnum |
|---|---|
|
Ink Deposit |
Soft, diffused, blendable |
|
Best For |
Shading, gradients, small fills |
|
Skin Trauma |
Low to moderate — gentler than magnums |
|
Line Quality |
No hard lines — creates soft edges |
Common RS Configurations
* 1RS – “1” indicates Needle Count
3RS
Fine Shading
Details
5RS
Light Shading
Grey Wash
7RS
Standard
Shading
9RS
Large Area
Blending
14RS
Max Coverage
Fast Fills
Technical Specifications
|
Material |
316L Medical Stainless Steel |
|---|---|
|
Needle Diameter |
#08 (0.25mm) / #10 (0.30mm) / #12 (0.35mm) |
|
Taper Length |
Long (5.5mm) / Medium (3.5mm) / Short |
|
Needle Spacing |
Looser than RL, tighter than Magnum |
|
Safety Feature |
Patented anti-backflow membrane |
|
Sterilization |
EO Gas, individually blister packed |
|
Packaging |
20 pcs/box (standard) / Custom OEM |
Explore Different Cartridges
Tattoo Cartridges with Membrane
Magnum tattoo cartridges
Round shader tattoo cartridges
Round liner tattoo cartridges
Round Magnum Tattoo Cartridges
Tight Round liner tattoo cartridges
Hollow Round liner tattoo cartridges
Bugpin Round liner tattoo cartridges
About R&G Bio
Built on Precision.
Trusted Globally.
Where Precision Meets Medical-Grade Standards
ISO 13485 certified facility with ISO Class 100,000 cleanrooms. 316L surgical steel, complete traceability.
End-to-End Manufacturing Control
From needle configuration to sterile packaging, every step is precision-controlled with automated assembly and batch tracking.
Meeting International Regulatory Standards
CE Mark, FDA Registered, KFDA Approved, ISO 13485, RoHS Compliant. Full documentation for global market entry.
Trusted Tattoo Needle Manufacturer Since 2009
15+ years serving 50+ countries with premium cartridge tattoo needles and flexible OEM/ODM solutions.
FAQs
OEM / ODM SERVICES
Contact us for wholesale pricing and custom configurations
Get In Touch
Request a Quotation
Tell us about your requirements and our team will respond within 24 hours with a detailed quote including pricing, lead times, and customization options.