Blue Thermal Labels 4×6″ (100×150 mm) for high-visibility shipping and barcode printing. Direct thermal economy paper with hot-melt adhesive and a neat perforation between each label. Ideal for ecommerce brands, warehouses and busy despatch teams using colour-coded workflows.
Confirmed in real use with Zebra GK420 (d/t), Citizen CL-S and TSC DA/TE 4″ printers. No ink or toner required — load the roll and print.
Key Features
- Size: 4×6″ (100×150 mm) — UK standard for courier labels
- Direct Thermal Economy paper — no ribbon needed
- Perforation between each label for clean tear and quick handling
- Hot-melt adhesive — strong bond on cardboard, films and plastics
- High-visibility blue stock — ideal for priority orders, returns and branded workflows
- Sharp print for barcodes and tracking codes
- Designed for short-term use (shipping, picking, returns)
- Works with Zebra GK420, Citizen CL-S and TSC 4″ thermal printers
Specifications
| Label Size | 4×6″ (100×150 mm) |
| Colour | Blue |
| Material / Type | Direct Thermal Economy paper |
| Adhesive | Hot-melt, permanent |
| Perforation | Yes — between each label |
| Core Size | 1″ (25 mm) |
| Printer Compatibility | Zebra GK420 series, Citizen CL-S series, TSC DA/TE series |
| Typical Use | Courier labels, barcodes, product ID, colour-coded workflows |
| Packs | Single roll, 10-roll, bulk trade packs |
Printer Compatibility
These labels are used daily in:
- Zebra GK420d / GK420t
- Citizen CL-S series
- TSC DA210 / DA220 and TE series
Also suitable for other 4″ direct thermal printers that accept 100 mm media width.
Common Uses
- Courier shipping labels (Royal Mail, DPD, Evri, UPS)
- Priority orders, returns and colour-coded pick waves
- Warehouse barcodes and product identification
- Box-end and shelf labels in busy fulfilment centres
Why Choose These Blue 4×6″ Labels
- UK shipping standard size with high-visibility colour
- Load-and-print simplicity — no ink or toner
- Durable hot-melt adhesive for reliable sticking
- Perforated for speed and clean separation
- Cost-effective economy stock for high-volume use
- UK stock and fast despatch for business continuity
Storage & Handling
- Store in a cool, dry place away from heat and direct sunlight
- Keep rolls in the bag/box until use to avoid dust on edges
- Use within 12–18 months for best print quality (short-term applications)
- Test adhesion on curved or low-energy plastics if critical
Helpful Links
- All Labels
- White 4×6″ Labels
- Red 4×6″ Labels
- Orange 4×6″ Labels
- Mailing Bags
- Cardboard Boxes
- Packaging Tape
- Integrated Labels
Label-size guidance: Avery UK shipping label size guide.
Trade & Bulk Orders
Supplying ecommerce brands, fulfilment centres and warehouses across the UK. Real-world tested in busy despatch environments.
- Bulk pricing tiers for 10+, 20+, 50+ rolls (mixed sizes/colours welcome)
- UK warehouse stock for reliable repeat supply
- Same-day despatch before cut-off; next-day courier options
- Pallet shipping available for larger consignments
- Purchase Orders accepted (business customers)
- VAT invoices on every order; pro-forma on request
- Samples for print and adhesion tests
- Compatibility help for Zebra GK420, Citizen CL-S, TSC DA/TE and other 4″ printers
- Colour-coding options: white, red, blue, yellow, orange
- Spec sheets on request (size, core, adhesive, perforation)
For quotes and samples, message us on WhatsApp +44 7450 981838 or email info@mrbags.co.uk.
Delivery & Service
UK stock held in our local warehouse. Orders placed before 5 pm Monday–Friday are despatched the same day.
- Royal Mail Tracked for reliable and fast delivery
- DPD Next Day for time-sensitive orders
- DPD Saturday Delivery available (paid upgrade)
- Tracking details provided automatically after despatch
- Secure packaging to protect rolls during transit
Please notify us in advance for urgent or weekend despatch so we can prioritise your order.
Customer Service & Support
Need help choosing the right size or placing a bulk order? Our team is here to assist you.
- Support – quotes and samples via WhatsApp: +44 7450 981838
- Email: info@mrbags.co.uk
- Click & Collect: 10A Locket Street, Manchester, M8 8EE
- Opening hours: Mon–Fri 10:00–19:00 | Sun 11:00–18:00
We reply quickly with clear, practical guidance.
| Size | 4x6 Inch (102x152 mm) |
| Color | Blue |
| Adhesive | Hot-melt (Permanent) |
| Core Size | 1 Inch (25 mm) |
| Perforation | Yes (Between Each Label) |
| Printer Compatibility | Citizen CL-S, TSC DA, Zebra GK420 |
| Type | Direct Thermal Economy |
Are these 4×6″ thermal labels compatible with Zebra printers?
Yes. These 4×6″ (100×150 mm) direct thermal labels work with most 4″ Zebra printers including GK420d and GK420t that accept roll-fed media.
Will these blue labels work in Citizen and TSC printers?
Yes. Widely used in Citizen CL-S series and TSC DA/TE printers for standard 4″ direct thermal operations.
Do I need ink or toner for these labels?
No. Direct thermal labels print through heat and do not require ink, ribbon or toner.
Are the labels perforated?
Yes. Each label is separated by a perforation which allows quick tear-off and fast packing.
What adhesive is used on these labels?
Hot-melt, permanent adhesive designed to stick effectively to cardboard, film and plastic surfaces.
Will the blue colour affect barcode scanning?
No. Barcodes remain clear and scannable when you use standard printer contrast settings; test a sample if unsure.
What is the core size and the size in millimetres?
Core size is 1″ (25 mm). Size is 4×6″ which equals 100×150 mm.
Are these labels waterproof or for long-term use?
They are intended for short-term applications in dry conditions. Direct thermal paper may fade when exposed to moisture, heat or sunlight.
How should I store the rolls to ensure best print quality?
Store in a cool, dry place away from heat and sunlight. Keep the rolls sealed until use and avoid dust on the edges.
Can I buy these in bulk and request samples?
Yes. Bulk and trade packs are available with VAT invoices. For samples or quotes, contact us via WhatsApp +44 7450 981838 or email info@mrbags.co.uk.
Royal Mail 24 Tracked
Dispatched same day if ordered before 5 pm Monday to Friday. Please allow up to 1-2 days for delivery.
£1.99
DPD Next Day
Dispatched same day if ordered before 3 pm Monday to Thursday. Not available to Scottish Highlands & Islands.
£4.99
Free on orders over £100