Flat Shader (F) Tattoo Cartridges for Bold Lines & Solid Fills
R&G Bio manufactures flat shader tattoo cartridges for brands, distributors and studios that need sharp edge control and strong color packing — with stable, factory-direct quality.
Each cartridge holds a single straight row of needles soldered in line for a blade-like edge: crisp lines, geometric shapes and solid color fills. We run the full flat line from 4F to 15F in #10 and #12 gauge.
Every cartridge is EO gas sterilized, batch-coded for full traceability, and produced in ISO Class 7 cleanrooms under an ISO 13485 quality system. Review our certifications and compliance documents and see how we manufacture before you place a bulk order.
We support full OEM/ODM programs — housing colors, private labeling and custom packaging built around your brand, with factory-direct MOQs and tiered wholesale pricing.
Model Reference
For example – 1005F
10 – Needle Diameter (Gauge)
05 – Needle Count
F – Needle Configuration
Needle Diameter (Gauge)
10 = #10 (Standard, approx. 0.30 mm)
12 = #12 (Standard, approx. 0.35 mm)
Needle Count
05 / 07 / 09 / 11 / 13 / 15
Needle Type
RL = Round Liner
RS = Round Shader
M1 = Magnum (Double Stack)
RM = Round Magnum
CM = Curved Magnum
F = Flat Shader
RLT = Textured Round Liner
TRL = Turbo Round Liner
STL = Super Tight Liner
#10 SERIES · 0.30MM BUGPIN — FINER MARKS, SOFTER SATURATION
|
MODEL |
GAUGE |
TAPER |
NEEDLE COUNT |
MEMBRANE |
STERILIZATION |
FIT |
TYPICAL USE |
|---|---|---|---|---|---|---|---|
|
1004F |
#10 · 0.30mm |
Short 0.4mm/0.7mm |
4 |
Yes |
EO Gas · ISO 11135 |
Universal cartridge grip |
Fine detail lines, small geometric accents, lettering touches |
|
1005F |
#10 · 0.30mm |
Short 0.4mm/0.7mm |
5 |
Yes |
EO Gas · ISO 11135 |
Universal cartridge grip |
Thin bold lines, small fills, tight corners |
|
1007F |
#10 · 0.30mm |
Short 0.4mm/0.7mm |
7 |
Yes |
EO Gas · ISO 11135 |
Universal cartridge grip |
Detail shading, smaller geometric fills, fine blackwork |
|
1009F |
#10 · 0.30mm |
Short 0.4mm/0.7mm |
9 |
Yes |
EO Gas · ISO 11135 |
Universal cartridge grip |
Smooth tonal shading, medium geometric fills |
|
1011F |
#10 · 0.30mm |
Short 0.4mm/0.7mm |
11 |
Yes |
EO Gas · ISO 11135 |
Universal cartridge grip |
Medium color packing with defined edges |
|
1013F |
#10 · 0.30mm |
Short 0.4mm/0.7mm |
13 |
Yes |
EO Gas · ISO 11135 |
Universal cartridge grip |
Larger fills with full edge control |
|
1015F |
#10 · 0.30mm |
Short 0.4mm/0.7mm |
15 |
Yes |
EO Gas · ISO 11135 |
Universal cartridge grip |
Maximum bugpin flat coverage for solid work |
#12 SERIES · 0.35MM STANDARD — STRONGER INK FLOW, BOLDER MARKS
|
MODEL |
GAUGE |
TAPER |
NEEDLE COUNT |
MEMBRANE |
STERILIZATION |
FIT |
TYPICAL USE |
|---|---|---|---|---|---|---|---|
|
1204F |
#12 · 0.35mm |
Short 0.4mm/0.7mm |
4 |
Yes |
EO Gas · ISO 11135 |
Universal cartridge grip |
Bold fine lines, detail work, sharp corners and edges |
|
1205F |
#12 · 0.35mm |
Short 0.4mm/0.7mm |
5 |
Yes |
EO Gas · ISO 11135 |
Universal cartridge grip |
Strong lines, small traditional fills, blackwork details |
|
1206F |
#12 · 0.35mm |
Short 0.4mm/0.7mm |
6 |
Yes |
EO Gas · ISO 11135 |
Universal cartridge grip |
Thicker lines, shading, small color fills |
|
1207F |
#12 · 0.35mm |
Short 0.4mm/0.7mm |
7 |
Yes |
EO Gas · ISO 11135 |
Universal cartridge grip |
The all-round flat: lines, shading, and color fill in one size |
|
1208F |
#12 · 0.35mm |
Short 0.4mm/0.7mm |
8 |
Yes |
EO Gas · ISO 11135 |
Universal cartridge grip |
Heavier shading, geometric fills, mandala work |
|
1209F |
#12 · 0.35mm |
Short 0.4mm/0.7mm |
9 |
Yes |
EO Gas · ISO 11135 |
Universal cartridge grip |
Solid fills, blackwork, strong color packing |
|
1211F |
#12 · 0.35mm |
Short 0.4mm/0.7mm |
11 |
Yes |
EO Gas · ISO 11135 |
Universal cartridge grip |
Fast medium-area packing, dark backgrounds |
|
1213F |
#12 · 0.35mm |
Short 0.4mm/0.7mm |
13 |
Yes |
EO Gas · ISO 11135 |
Universal cartridge grip |
Large solid fills, heavy background coverage |
|
1215F |
#12 · 0.35mm |
Short 0.4mm/0.7mm |
15 |
Yes |
EO Gas · ISO 11135 |
Universal cartridge grip |
Maximum single-row coverage for big color fields |
Built Like a Medical Device, Priced for Wholesale
We control every step in our own factory, from needle grinding to sterile packing.
01 Safety Membrane System
A medical-grade elastic membrane sits inside every cartridge. It keeps needle tension steady during long sessions and stops ink and body fluids from flowing back into the grip and machine. No backflow, no cross-contamination.
02 Polished Needle Tips
We use 316L surgical stainless steel with a mirror-polish finish. Smooth tips mean less friction in the skin and cleaner healed results. Each row is soldered in line by mold, so the straight edge stays identical across every batch.
03 Medical-Grade Housing
The shell is medical-grade polymer with a clear tip. Artists see the ink flow while they work. The body has a non-slip grip design, and the standard fitting works with most rotary machines and cartridge grips on the market.
04 EO Gas Sterilization
Every cartridge is sealed in its own blister pack and sterilized with EO gas. Our sterilization process is validated under ISO 11135, with batch records kept for full traceability.
05 Two-Stage Quality Control
Every unit passes 100% visual inspection on the line. Then 30% of each batch is checked again under 100x microscopy for tip shape, solder quality, and row alignment. Bent or dull needles never ship.
Why a Single Row?
A magnum spreads needles across two rows. A flat shader puts them all on one line. That single edge works almost like a blade: it cuts a clean border, fills corners without overflow, and lays down dense, even saturation along the full width of the row. Artists rotate the wrist to work with the flat side for fills, or ride the edge for sharp detail. That is why flat shaders stay in every blackwork, geometric, and traditional artist’s setup — no other configuration gives this level of edge control.
Where Curved Magnums Work Best
One configuration, four core jobs. If the work needs soft edges and smooth tone, this is the needle.
Large-Area Color Packing
The single row drives dense, even saturation with a clean border. Ideal for solid color fields in traditional, neo-traditional, and Japanese work where edges must stay crisp.
Backgrounds & Blackwork
Heavy black backgrounds, tribal fields, and blackout panels. Larger flats like 11F to 15F lay down solid black fast, with sharp borders around the existing design.
Black & Grey Tonal Work
Realism artists use flats for tonal gradations and layered shading where structure matters. The straight edge builds value in controlled layers instead of soft feathering.
Geometric, Corners & Edges
Mandalas, geometric patterns, and any design with tight corners. The straight row reaches into angles and traces sharp borders that round needles simply cannot hit.
Small Number, Detail Work. Big Number, Solid Coverage.
Needle count sets the row width. Match it to the job — that is the whole logic.
4F – 5F
Lines, details, tight corners
6F – 9F
Shading, thicker lines, medium fills
11F – 13F
Large fills, solid backgrounds
15F
Maximum coverage, big color fields
Weaved Magnum (M1) vs Flat Shader (F/M2)
Both fill and shade. The difference is the structure: M1 spreads needles over two staggered rows for fast, forgiving coverage; the flat shader concentrates them in one row for sharp edges and maximum control.
|
FLAT SHADER (F/M2) |
WEAVED MAGNUM (M1) |
|
|---|---|---|
|
Needle Layout |
Single straight row |
Two staggered rows, zipper weave |
|
Coverage Speed |
Fast on small to medium zones |
Faster on large areas |
|
Ink Saturation |
Dense per point, along a narrow band |
Even across a wide band, fewer gaps |
|
Edge Character |
Sharp, defined borders |
Clean fills, no striping |
|
Skin Trauma |
Needs a skilled hand — the edge can cut like a blade if dragged |
Lower — pressure spread over two rows |
|
Best For |
Geometric work, corners, bold lines, blackwork, tonal detail |
Large-area packing, backgrounds, fast fills |
|
Body Areas |
Flat skin zones, straight edges, corners |
Large flat zones, general coverage |
Need faster large-area coverage? See our Weaved Magnum (M1) cartridges.
Our Certifications
R&G Bio is an integrated manufacturer with verified FDA registration, ISO 13485 / ISO 9001 certification and EU RoHS compliance — the documentation your market actually requires.
Wholesale & OEM Programs
Factory-direct supply with full batch traceability. Tell us your sizes and target volume — we reply within 12 hours with a full quotation.
MOQ from 1,000 pcs
Standard sizes start low; mixed sizes allowed in one order.
Tiered Factory Pricing
The more you take, the lower the unit cost. Full price ladder with every quotation.
Fast Lead Time
Standard sizes ship from running production; OEM timelines confirmed with your quote.
Private Label & OEM
Your brand, built on our production lines — in-house design and engineering support.
Qualified B2B buyers can request a free sample kit before committing to an order.
FAQs
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Find Expert insights
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.
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.